Suspended seat and method for assembling such a seat

Abstract

This disclosure relates to a suspended seat (1) for a vehicle comprising: - a seat (2) including a seat frame (20) - a slide system having at least one slide (3, 4) - a suspension system (5) interposed between the seat frame (20) and the slide system, - a system for limiting the movement of the seat relative to the slide system having at least one flexible link (6, 7), having an untensioned state in the rest position of the suspension system, said at least one flexible link (6, 7) being configured to tighten during a tilting of the seat frame (20) relative to the slide system, limiting the amplitude of the tilting during a crash.

Description

Title of the invention: Suspended seat and method of assembling such a seat

[0001] The present disclosure relates to a suspended seat, and further relates to a method of assembling such a seat. Technical field

[0002] In the present disclosure, and in a known manner, a vehicle seat may typically comprise: - a seat, which extends in a direction X, from a front edge to a rear edge, and extends transversely in a direction Y, from a first lateral edge to a second lateral edge, - a backrest which extends in height from the rear edge of the seat, in a Z direction, vertical, or typically inclined backwards, from a lower edge to an upper edge of the backrest, and extends transversely in a Y direction, from a first lateral edge, to a second lateral edge.

[0003] The backrest can be tilted relative to the seat, typically by a pivot axis between the backrest frame and the seat frame, extending in the transverse direction Y.

[0004] The position of the seat in the vehicle can typically be adjusted, along the X direction, by means of a slide system, typically with a first slide and a second slide connecting the seat to the floor of the vehicle in parallel.

[0005] Thus, the or each of the two slides comprises two slide parts with a first slide part secured to the floor and a slide part secured to the seat base, configured to slide relative to each other in the X direction.

[0006] The present disclosure is however more particularly concerned with suspended seats, namely a seat which comprises a suspension system interposed between the slides and the seat frame, and as taught for example by US 3,957,304 B1 or US 10,155,461 B2.

[0007] Such a suspension system comprises an upper chassis secured to the seat chassis and a lower chassis, secured to the slides, and a mechanism comprising an elastic suspension member, for example a scissor arm system and a metal spring as illustrated in US 3,957,304 B1 or of the pneumatic type, ensuring the damping of the suspended part, secured to the upper chassis relative to the unsprung part secured to the lower chassis anchored to the floor.

[0008] A raising system, allowing the seat height to be adjusted, may be provided between the seat frame and the upper frame of the suspension system. As seen in the figures of US 3,957,304 B1, the raising system may comprise connecting rods connecting the upper frame and the seat frame. The connecting rods are adjustable in angle relative to the upper frame, to allow various spacings between the seat frame and the upper frame.

[0009] The seat suspension system is advantageously a comfort equipment which makes it possible to filter out road irregularities by allowing the seat to move relative to the floor of the vehicle, in particular in a vertical direction.

[0010] The mechanism of the suspension system is however the cause of a tilting of the seat relative to the slides, for example the cause of a sudden tilting of the seat forward in the event of a sharp deceleration. In the event of a frontal impact, the sudden deceleration may cause a breakage of the mechanism of the suspension system, or even the cause of a risk of submarining of the occupant, namely that the occupant may slide under the pelvic portion of the seat belt during the impact. Prior art

[0011] Document US 3,957,304 discloses such a suspended seat which comprises two flexible links, arranged respectively on both sides of the seat, connecting the lower chassis by a first end of the cable, to the seat chassis, or even the upper chassis by a second end of the cable secured to a safety belt anchoring point.

[0012] In the rest position of the seat, these flexible links, such as cables, are in an untensioned state. In the event of the seat tilting, as encountered during a frontal impact, the cables are tensioned, limiting the forward tilting of the seat. The forces of the impact pass through these cables, directly from the seat belt anchor points, on each side of the seat to the lower chassis, relieving the suspension mechanism, preventing breakage of the suspension system.

[0013] According to the inventors' findings, such a system for limiting seat tilting has certain drawbacks such as: - the obligation to use flexible links with a certain tensile strength to contain the forces during the crash, or even, - the need to provide certain anchor points, specific and dedicated to these flexible links only, which increases the cost of the seat, or even further, - when assembling the suspended seat, the dedicated time required by the operator for the anchoring of these flexible links, causing an increase in the manufacturing cycle time of the suspended seat compared to the time that would be necessary for a seat without such flexible links. Summary

[0014] The present disclosure improves the situation.

[0015] Also, the present disclosure relates to a suspended seat for a vehicle comprising: - a seat comprising a seat frame, - a slide system having at least one slide comprising a first, fixed part, intended to be anchored to the floor of the vehicle and a second, mobile part, sliding relative to the first part, - a suspension system interposed between the seat frame and the slide system, comprising an upper frame and a lower frame between which is interposed a mechanism comprising an elastic suspension member, said suspension system being fixed by its lower frame to the second, movable part of said at least one slide, said suspension system being configured to allow movement of the upper frame relative to the lower frame, - a system for limiting the movement of the seat relative to the slide system comprising at least one flexible link, having a non-tensioned state in the rest position of the suspension system, said at least one flexible link being configured to tension when the seat chassis tilts relative to the slide system, limiting the amplitude of the tilting during a crash.

[0016] According to the present disclosure, said at least one flexible link is configured to be tensioned during tilting, with tensioning of two strands of said at least one flexible link, comprising at least one first strand and at least one second strand, respectively arranged in parallel between the second movable part of said at least one slide, or a fixing portion of the lower chassis, straddling and secured to the second part, on the one hand, and the upper chassis, on the other hand, on the side of said at least one slide.

[0017] The features set out in the following paragraphs may optionally be implemented. They may be implemented independently of one another or in combination with one another: - said at least one flexible link is connected to the upper chassis by means of a guide means configured to allow limited sliding of said at least one flexible link relative to the upper chassis, or alternatively, said at least one flexible link is connected to the second part of the slide, or to the attachment portion of the lower chassis straddling and secured to the second part, by means of a guide means configured to allow limited sliding of said at least one link flexible compared to the second upper part; - said at least one slide being oriented in a direction X, said at least one first strand and said at least one second strand are in offset positions in the direction X; - the upper frame supports an anchoring hole for a seat belt, in particular an anchoring hole for the stalk of a seat belt; - said at least one first strand and the at least one second strand are arranged, in the direction X, in offset positions, on either side of said anchoring orifice; - said at least one first strand and said at least one second strand of said at least one flexible link are adjacent to each other by an intermediate portion of said at least one flexible link cooperating in sliding with the guide means, the guide means and said intermediate portion being configured to slide relative to each other in order to balance the tension of said first strand and the tension of said second strand, offset in the X direction, during tilting; - the guide means comprises a loop, or several loops offset along the X direction, such as for example a first loop and a second loop offset along the X direction, for example on either side of an anchoring hole for the seat belt, the loop(s) being formed on the upper chassis according to the first possibility, or formed on the support fixed to the second slide part according to the second possibility; - the loop(s), in particular the first loop and the second loop, are formed by one or more cutouts in a metal part of the upper frame; possibly the loops are provided with plastic inserts configured to prevent contact between the metal and said at least one link at the loop(s); - the suspension system comprises a tubular bellows protecting the mechanism comprising the suspension member received internally to the bellows, the bellows connecting the lower chassis and the upper chassis, said flexible link being engaged with the upper chassis, at the level of at least one lateral extension of the upper chassis, projecting laterally in a direction Y, perpendicular to the direction X of the slide in the rest position of the seat, said at least one lateral extension coming into overhang from the bellows, extending above said at least one slide, on the side of said at least one slide; - said lateral extension of the upper chassis supports said anchoring hole for a seat belt, in particular an anchoring hole for the peduncle of a seat belt; - the flexible link comprises a first attachment portion secured to said at least one first strand and a second attachment portion secured to said at least one second strand, attached respectively to the second movable part of the slide, or to the portion of the lower chassis secured and straddling the second part according to a first possibility, or alternatively the flexible link comprises a first attachment portion secured to said at least one first strand and a second attachment portion secured to said at least one second strand, attached respectively to the upper chassis according to a second possibility, and wherein said at least one flexible link engages with the upper frame, at an intermediate portion of said at least one flexible link between said at least one first strand and said at least one second strand according to the first possibility, or said at least one flexible link engages with a support fixed on the second part of the slide, according to the second possibility, and wherein in the case of tilting the at least one flexible link is configured to be tensioned, with tensioning of the two strands of said at least one flexible link, comprising said at least one first strand formed between the first attachment portion and said intermediate portion and said at least one second strand formed between the second attachment portion and said intermediate portion; - said at least one slide being oriented in a direction X, said at least one first strand and said at least one second strand being in offset positions in the direction X and the first attachment portion and the second attachment portion are offset in the direction X; - said at least one flexible link is a strip having two longitudinal ends respectively forming the first attachment portion and the second attachment portion; - the lower chassis of the suspension system comprises the fixing portion secured to the second part of said at least one slide by a first fixing member and a second fixing member, the first fixing member and the second fixing member being in an offset position along a direction X of said at least one slide and in which the first attachment portion is formed by a first longitudinal end of the strip which is pinched between the fixing portion of the lower chassis and the second part of said at least one slide, crossed by the first fixing member, and a second longitudinal end of the strip which is pinched between the fixing portion and the second part of the slide, crossed by the second fixing member; - the first longitudinal end of the strip forming the first attachment portion comprises a first metal eyelet crossed by the first fixing member and the second longitudinal end of the strip forming the second attachment portion comprises a second metal eyelet crossed by the second fixing member; - said at least one flexible link is a flexible loop, which is fixed by inserting the flexible loop into a rigid ring, integral with the second slide part or with said fixing portion of the lower chassis, according to a first possibility, then by folding two portions of the loop around the rigid ring, and hooking the two folded loop portions onto the upper frame, or alternatively by inserting the flexible loop into a rigid ring, secured to the upper frame according to the second possibility, then by folding two folded loop portions around the rigid ring, and hooking the two loop portions onto a support fixed to the second part of the slide; - said at least one flexible link comprises a first strap, and a second strap, and a flexible connecting portion joining the first strap and the second strap, and in which said at least one flexible link is fixed by inserting the flexible link into a rigid ring, secured to the second slide part according to the first possibility, then by folding the connecting portion around the rigid ring, and hooking the first strap and the second strap onto the upper frame, or by inserting said flexible link into a rigid ring, secured to the seat frame according to the second possibility, then by folding the connecting portion around the rigid ring, and hooking the first strap and the second strap onto the support fixed to the second part of the slide; - the two loop portions of said at least one flexible link are attached to a part of the upper chassis carrying a safety belt anchoring hole, or the first strap and the second strap are attached to a part of the upper chassis carrying a safety belt anchoring hole; - said at least one slide of the slide system comprises a first slide and a second slide, oriented longitudinally in the X direction, distributed transversely, in a Y direction, on either side of the suspension system, and in which said at least one flexible link comprises a first flexible link connecting the first slide to the upper chassis, on the side of the first slide and a second flexible link connecting the second slide to the upper chassis, on the side of the second slide; - a raising system interposed between the seat frame and the upper frame comprising connecting rods connecting the flanges of the seat frame to the upper frame in articulation.

[0018] According to a second aspect, the present disclosure relates to a method of assembling a suspended seat according to a first embodiment in which the at least one flexible link is put in place, by fixing the first longitudinal end of the strip and the second longitudinal end of the strip, during the assembly of the fixing portion of the lower chassis to the second part of said at least one slide, by pinching the first longitudinal end of the strip forming the first attachment portion and the second longitudinal end of the strip forming the second attachment portion, between the fixing portion of the lower chassis and the second slide portion and placing the first fixing member and the second fixing member respectively through the first longitudinal end and the second longitudinal end of the strip, the first fixing member and the second fixing member respectively joining the second slide portion and the fixing portion of the lower chassis.

[0019] According to a third aspect, the present disclosure relates to a method of assembling a suspended seat according to a second or even a third embodiment allowing assembly of said at least one flexible connection without tools, in which said at least one flexible connection is put in place - when said at least one flexible link is the loop, by inserting the flexible loop into a rigid ring, integral with the second part of said at least one slide according to the first possibility, then by folding two portions of the flexible loop around the rigid ring, and hooking the two folded portions of said loop onto the upper frame, or by inserting the flexible loop into a rigid ring, integral with the upper frame according to the second possibility, then by folding two portions of the loop around the rigid ring, and hooking the two folded portions onto a support fixed to the second part of the slide, or alternatively, - when said at least one flexible link comprises the first bracelet and the second bracelet as well as the flexible connecting portion joining the first and second bracelets, by inserting the flexible link into a rigid ring, secured to the second part of said at least one slide according to the first possibility, then by folding the connecting portion around the rigid ring, and hooking the first bracelet and the second bracelet onto the upper frame, or alternatively, by inserting said flexible link into a rigid ring, secured to the upper frame according to the second possibility, then by folding the connecting portion around the rigid ring, and hooking the first bracelet and the second bracelet onto a support fixed to the second part of the slide. Brief description of the drawings

[0020] Other characteristics, details and advantages will appear on reading the detailed description below, and on analyzing the attached drawings, in which: Fig.l

[0021] [Fig.l] shows a suspended seat comprising a seat and a backrest, as well as a system of slides, including a first slide and a second slide, on each side of the seat, and a suspension system interposed between the seat frame and the slide system, as well as a system for limiting the angular movement of the seat relative to the slide comprising a first flexible link in the form of a band, connecting an upper frame of the suspension system to the first slide, side of the first slide, as well as a second flexible link in the form of a strip, connecting the upper frame to the second slide on the side of the second slide, and according to a first embodiment of the present disclosure. Fig. 2

[0022] [Fig.2] is a sectional view of the seat of [Fig.l], illustrating the mechanism of the suspension system comprising an elastic suspension member, in particular at least one spring mounted in extension, and a scissor arm system. Fig. 3

[0023] [Fig.3] is a side view of the seat of [Fig.l], illustrating the second link under form of a strip, which comprises two strands with a first strand and a second strand, connecting in parallel the upper frame and the slide, the two strands being in offset positions following the direction of the slide. Fig. 4

[0024] [Fig.4] is an enlarged view of the first flexible link of the seat of [Fig.l]. Fig. 5

[0025] [Fig.5] is a sectional view along a plane parallel to the XZ plane, passing through the second flexible connection, illustrating more particularly two loops acting as a guide means on the upper chassis, including a first loop and a second loop between which extends an intermediate portion of the strip arranged between the first strand and the second strand, the first strand being terminated by a first attachment portion, pinched between the lower chassis and the upper profile of the second slide, and crossed by a first fixing member ensuring the attachment of the lower chassis to the upper profile of the slide, the second strand being terminated by a second attachment portion pinched between the lower chassis and the upper profile of the second slide, and crossed by a first fixing member ensuring the attachment of the lower chassis to the upper profile of the slide Fig. 6

[0026] [Fig.6] is an enlarged view of [Fig.5]. Fig. 7

[0027] [Fig.7] is a sectional view passing through a plane parallel to the YZ plane passing simul tangentally through the anchoring hole of a seat belt and the first fixing member. Fig. 8

[0028] [Fig.8] shows a suspended seat comprising a seat and a backrest, as well as a slide system, including a first slide and a second slide, on each side of the seat, and a system interposed between the seat frame and the slide system, as well as a system for limiting the angular movement of the seat by relative to the slide comprising a first flexible link in the form of a loop, connecting an upper frame of the suspension system to the first slide, on the side of the first slide, as well as a second flexible link in the form of a loop, connecting the upper frame to the second slide on the side of the second slide, and according to a second embodiment of the present disclosure. Fig. 9

[0029] [Fig.9] is a detail view of [Fig.8], illustrating the attachment of the second link flexible, in the form of a loop, which is attached between a lower rigid ring secured to a fixing portion of the lower chassis and a wing forming a hook of the upper chassis, directed upwards, said wing carrying an anchoring hole for a seat belt. Fig. 10

[0030] [Fig. 10] is a view of [Fig.9], illustrating the cooperation of the loop which, during its assembly, is put in place without tools, by inserting the loop into the rigid ring (lower), then folding the loop around the ring and with attachment of two portions of the folded loop on the hook of the upper frame. Fig. 11

[0031] [Fig. 11] is a detailed view of the flexible link in the form of a loop folded around the ring, in the lower part, with attachment to the hook in the upper part, the loop thus folded forming two first strands and two second strands, arranged in offset positions following the direction of the slide, on either side of the anchoring hole for fixing a safety belt. Fig. 12

[0032] [Fig. 12] is a view of a flexible connection, comprising a first strap and a second strap, connected to each other by an intermediate connection portion, and which is perhaps used as a replacement for the buckle illustrated in [Fig.l 1] Fig. 12a

[0033] [Fig. 12a] is a view of how the flexible connection of [Fig. 12] is assembled, which is put in place without tools, by inserting the flexible connection into the rigid (lower) ring, then folding the connection portion and hooking the two bracelets consisting of the first bracelet and the second bracelet onto a hook on the upper chassis. Fig. 13

[0034] [Fig. 13] is a view of a loop and its section formed from a textile sheath and an elastic internal to said sheath. Description of the embodiments

[0035] The following drawings and description contain, for the most part, elements of certainty. They may therefore not only serve to better understand this disclosure, but also contribute to its definition, if necessary.

[0036] Also, and as illustrated in the figures, the present disclosure relates to a suspended seat 1 for a vehicle comprising: - a seat 2 comprising a seat frame 20 - a slide system having at least one slide 3, 4 comprising a first part 30, 40, fixed, intended to be anchored to the floor of the vehicle and a second part 31, 41, mobile, sliding relative to the first part, - a suspension system 5 interposed between the seat frame 2 and the slide system, comprising an upper frame 50 and a lower frame 51 between which is interposed a mechanism comprising an elastic suspension member 52, said suspension system being fixed by its lower frame 51 to the second part 31, 41, movable, of said at least one slide 3, 4, said suspension system being configured to allow movement of the upper frame 50 relative to the lower frame 51.

[0037] Said at least one slide 3, 4 of the slide system may comprise a first slide 3 and a second slide 4, oriented parallel longitudinally in the X direction, distributed transversely, in a Y direction, on either side of the suspension system.

[0038] Each slide 3 or 4 comprises the first part 30 or 40, fixed, which can be formed by a lower profile PFinf and the second part 31 or 41 which can be formed by an upper profile PFsup, in a manner well known to those skilled in the art, and as illustrated in the sectional view of [Fig.7].

[0039] The lower chassis 51 is fixed by fixing portions to the second part 31, 41, by fixing members, such as screw / nut systems.

[0040] The mechanism connecting the upper chassis 50 to the lower chassis 51 comprising said elastic suspension member 52 is illustrated, according to a non-limiting embodiment in [Fig.2]. A tubular bellows 53, illustrated in [Fig.8] connecting the upper chassis 50 to the lower chassis 51 and receives the mechanism. This bellows 53 protects against the risk of pinching with the mechanism.

[0041] The mechanism may comprise a scissor arm system, comprising a first arm 54 and a second arm 55, articulated to each other along an articulation axis 56, extending along the Y direction.

[0042] The first arm 54 is articulated at its upper end to a hinge pin 58 of the fixed upper chassis 50, for example in the rear position (along the direction X) on the upper chassis, and has at its lower end a rolling member such as a roller 57, mounted to roll along a rolling track of the lower chassis 51.

[0043] The second arm 55 is articulated at its lower end to a hinge pin 59 of the lower chassis 51, fixed, for example in the rear position (along the direction X) on the upper chassis, and has at its upper end a rolling member such as a roller, mounted to roll along a rolling track of the upper chassis 50.

[0044] In such a mechanism, and during a vertical movement of the seat downwards, the mechanism guides the approach of the upper chassis 50 relative to the lower chassis, the rollers 57 of the arms (54 or 55) moving away from the articulation axes 58, 59. The arms 54, 55 thus move apart, recalled by the return force of the elastic suspension member 53, constituted here by one or more springs mounted in extension between the two arms 54, 55.

[0045] The suspended seat may also comprise a raising system interposed between the seat frame 20 and the upper frame 50 comprising connecting rods 8 connecting in articulation flanges 21 of the seat frame 20 to the upper frame 50.

[0046] Two connecting rods 8 are articulated, on the one hand, at their lower end to the upper chassis 50, and on the other hand at their upper end to the seat chassis 20, along two articulation axes parallel to the Y direction on the rear of the seat, and two other connecting rods 8 are articulated, on the one hand at their lower end to the upper chassis 50, and on the other hand at their upper end to the seat chassis 20, along two articulation axes parallel to the Y direction on the front of the chassis. The inclination of the connecting rods, (and thus the spacing between the seat chassis 20 and the upper chassis 50) can be adjusted by manual pumping on an irreversible adjustment mechanism, or even in a motorized manner, an output pinion of the irreversible adjustment mechanism (or of a motor) meshing with a toothing of a connecting rod or even with a rack.

[0047] In the event of a crash, for example in the event of a frontal crash (in the direction X), the occupant of the seat is restrained by the seat belt, the sudden deceleration of the crash causing a force which tends to tip the seat, in the direction S of the arrow illustrated in [Fig.2].

[0048] The suspended seat 1 then comprises a system for limiting the movement of the seat relative to the slide system comprising at least one flexible link 6, 7, having a non-tensioned state in the rest position of the suspension system, namely when the seat and its occupant are not subjected to acceleration. Said at least one flexible link 6, 7 is then configured to tension during a tilting of the seat frame 20 relative to the slide system, in particular in the direction S, by limiting the amplitude of the tilting during a crash, namely when the seat 2 of the seat tilts forward.

[0049] Thus, said at least one flexible link may comprise: - a first flexible link 6 connecting the first slide 3 to the upper frame 50 on the side of the first slide 3 - a second flexible link 7 connecting the second slide 4 to the upper frame 50, on the side of the second slide 4.

[0050] According to the illustrated embodiments, said at least one link, namely said first link 6 and said second link 7, are arranged in a rear position of the seat in the direction X, namely in an optimal position to limit the tilting of the seat forward, in particular in the case of a frontal impact.

[0051] According to an embodiment not illustrated, said at least one link, namely said first link 6 and said second link 7, can also be arranged in a front position of the seat in the direction X, namely in an optimal position to limit the tilting of the seat towards the rear, in particular in the case of an impact coming towards the rear.

[0052] According to yet another embodiment, said at least one link, namely said first link 6 and said second link 7, can also be arranged in a front position and a rear position of the seat along the direction X, namely in optimal positions for limiting the tilting of the seat forwards and backwards: in such a case, a first link 6 (respectively a second link 7) is in a front position, and another first link 6 (respectively second link 7) is in a rear position.

[0053] According to the present disclosure, said at least one flexible link 6, 7 is configured to be tensioned during tilting, with tensioning of two strands of said at least one flexible link 6, 7, comprising at least one first strand B1 and at least one second strand B2, respectively arranged in parallel between the second movable part 31, 41 of said at least one slide, or a fixing portion of the lower chassis 51 straddling and secured to the second part, on the one hand, and the upper chassis 50, on the other hand, on the side of said at least one slide 6.

[0054] Then and according to the present disclosure, each flexible link, (namely the first flexible link 6 and the second flexible link 7) comprises said at least one first strand B1 and said at least second strand B2, connecting in parallel the upper chassis, on the one hand, to the lower chassis, or even to the second movable part 31 of the first slide 3, for said first flexible link 6, or even to the second movable part 41 of the second slide 4, for the second flexible link 7.

[0055] According to the first embodiment of figures 1 to 7, said at least one flexible link (first flexible link 6 or the second flexible link 7) is constituted by a strip Bd, for example a textile strip, the first strand B1 and the second strand B2 constituted by two length sections of the strip Bd. In this embodiment, the retaining force limiting the tilting is transmitted on each side of the seat in parallel on the two strands B1, B2.

[0056] According to the second embodiment of figures 8 to 11, said at least one flexible link (the first flexible link 6 or the second flexible link 7) is constituted by a loop Bc folded over a ring 9, on the lower chassis 51 and attached to the upper chassis 50 (or vice versa) and which forms two first strands B1 and two second strands B2. In this embodiment, the retaining force limiting the tilting is transmitted on each side of the seat in parallel on the four strands B1, B2.

[0057] According to a third embodiment (figures 12 and 12a), the flexible link 6 7, (the first flexible link 6 or the second flexible link 7) comprises a first bracelet Br1, and a second bracelet Br2, and a flexible connecting portion L12, joining the first bracelet Br1 and the second bracelet Br2.

[0058] This flexible link when folded over a ring 9, on the lower chassis 50 and attached to the upper chassis 51 (or vice versa) forms, on the one hand, a first strand B1, with the first bracelet Br1 and half of the length section of the flexible connection portion L12, and forms, on the other hand, a second strand B2 with the second bracelet Br2 and the other half of the length section of the flexible connection portion L12.

[0059] In all cases, and advantageously, the section of the at least one flexible connection 6, 7, which comprises at least one first strand B1 (one first strand B1, or even two first strands B1 in parallel) and at least one second strand B2 (one second strand B2, or even two second strands B2 in parallel) can be chosen to be smaller than the section which would be necessary if a single strand entirely supported the retaining force on each side of the seat.

[0060] According to one embodiment, said at least one flexible link 6, 7 can be connected to the upper chassis 50 by means of a guide means G configured to allow limited sliding of said at least one flexible link 6, 7 relative to the upper chassis 50 and as illustrated in FIGS. 1 to 12.

[0061] Alternatively, said at least one flexible link is connected to the second part of the slide, or to the attachment portion of the lower frame mounted on the straddle and secured to the second part by means of a guide means G configured to allow limited sliding of said at least one flexible link relative to the second upper part.

[0062] In particular, and when said at least one first strand B1 and said at least one second strand are offset in the direction X, said at least one first strand B1 and said at least one second strand B2 of said at least one flexible link 6;7 are adjacent to each other by an intermediate portion Int of said at least one flexible link 6;7 cooperating in sliding with the guide means G, the guide means G and said intermediate portion Int being configured to slide relative to each other in order to balance the tension of said first strand B1 and the tension of said second strand B2, offset relative to each other in the direction X during tilting, in par- particular during a crash.

[0063] According to one embodiment, the guide means G comprises a loop, or several loops offset along the direction X or along a direction slightly inclined relative to this direction, such as for example a first loop Pal and a second loop Pa2 offset along the direction X (in the rest position of the seat), the loop(s) being formed on the upper chassis 50 according to the first possibility, or else formed on the support fixed to the second slide part according to the second possibility (not illustrated).

[0064] The loop(s), in particular the first loop Pal and the second loop Pa2, may be formed by one or more cutouts in a metal part of the upper frame 50. The loop(s) may be provided with plastic inserts Ins configured to prevent contact between the metal and said at least one link at the loop(s), and in particular contact between the strip Bd and the metal.

[0065] According to the second embodiment, the guide means G may simply comprise one or more surfaces on which the intermediate portion Int of said at least one flexible link is attached, and in particular the upper part of the loop Bel.

[0066] According to one embodiment, said at least one slide being oriented in a direction X, said at least one first strand B1 and said at least one second strand B2 are in positions offset in the direction X, and as visible in the embodiments of figures 1 to 11. According to another embodiment illustrated by way of example in figure 12a, said at least one first strand B1 and said at least one second strand B2 may be in positions offset in the direction Y.

[0067] According to one embodiment, the upper chassis 50 supports an anchoring hole Ac for a seat belt, in particular an anchoring hole for the stalk of a seat belt. In particular, the chassis comprises an anchoring hole Ac, on each side of the upper chassis 50.

[0068] According to one embodiment, and when said at least one first strand B1 and at least one second strand B2 are offset along the direction X, then said at least one first strand Br1 and said at least one second strand Br2 can advantageously be arranged, along the direction X, in offset positions, on either side of said anchoring orifice Ac.

[0069] Thus, and in [Fig.6], it is noted that the first strand B1 formed by a first length section of the strip Bd and the second strand B2 formed by a second length section of the strip Bd are arranged on either side of the anchoring orifice. It is also noted that the first loop Pal and the second loop Pa2 are offset along the direction X, on either side of the anchoring orifice Ac.

[0070] When the suspension system 5 includes the tubular bellows 53 protecting the mechanism comprising the suspension member 52, received internally to the bellows, the bellows connecting the lower chassis 51 and the upper chassis 50, said least flexible link 6, 7 can be engaged with the upper chassis 50, at the level of at least one lateral extension 500, 501 of the upper chassis, projecting laterally in a direction Y, perpendicular to the direction X of the slide in the rest position of the seat.

[0071] This lateral extension 500, 501 is cantilevered from the bellows, extending above said at least one slide 3, 4, on the side of said at least one slide 3, 4.

[0072] Generally, the upper chassis 50 may comprise: - a first lateral extension 500 extending in the direction Y, cantilevered from the bellows extending above the first slide 3, engaged with the first flexible link 6, - a second lateral extension 501 extending in the Y direction, cantilevered from the bellows, extending above the first slide 3, engaged with the second flexible link 7.

[0073] Said lateral extension (first lateral extension 500 or second lateral extension 501) can be engaged with the flexible link (first or second flexible link) thanks to the loop(s), in particular the first loop Pal and the second loop Pa2, crossed by said at least one flexible link, and as illustrated in [Fig.6].

[0074] Alternatively, said lateral extension 500, 501 can engage with the flexible link, first or second flexible link, by simple attachment, and as illustrated in [Fig.9] and 10. The lateral extension 500, 501 can have an upwardly folded wing 502, forming a hook, and on which said at least one flexible link 6, 7 can be attached. This folded wing can carry the attachment orifice Ac, or even a nut Ec extending the anchoring orifice Ac and whose tapping makes it possible to screw a threaded part for fixing a safety belt.

[0075] According to an embodiment illustrated in Figures 1 to 11, the flexible link 6, 7 comprises a first attachment portion At1 secured to said at least one first strand B1 and a second attachment portion At2 secured to said at least one second strand, attached respectively to the second movable part 31, 41 of the slide, or to the portion of the lower frame 51 secured and straddling the second part according to a first possibility. Said at least one flexible link 6, 7 then engages with the upper frame 50, for example with the hook facing upwards, or even engages with the loop(s), at an intermediate portion Int of said at least one flexible link between said at least one first strand B1 and said at least one second strand B2 according to this first possibility.

[0076] Alternatively and according to an inverted embodiment (not illustrated) the flexible link comprises a first attachment portion At1 secured to said at least one first strand B1 and a second attachment portion At2 secured to said at least one second strand, attached respectively to the upper frame according to a second possibility. Said at least one flexible link 6, 7 then engages with a support fixed to the second part of the slide, for example in the loop(s), or even engages with a hook facing downwards.

[0077] In both cases, first possibility or second possibility, in the case of tilting, the at least one flexible link 6, 7 is configured to be tensioned, with tensioning of the two strands B1, B2 of said at least one flexible link, comprising said at least one first strand B1 formed between the first attachment portion At1 and said intermediate portion Int and said at least one second strand B2 formed between the second attachment portion At2 and said intermediate portion Int.

[0078] According to the first embodiment, said at least one flexible link 6, 7 is a strip Bd having two longitudinal ends respectively forming the first attachment portion At1 and the second attachment portion At2, and as illustrated by way of example in Figures 1 to 7. In [Fig. 6], this strip Bd extends from a first end fixed on the slide to the upper chassis 50 by forming the first strand B1, then through the first loop Pa and the second loop Pa2 on an intermediate portion Int, and finally extends to a second end fixed on the slide, by forming the second strand B2.

[0079] This strip Bd can be fixed to the slide at its first attachment portion Atl and its second attachment portion, by the fixing members used to fix the lower chassis to the slide 3, 4, and therefore advantageously without a dedicated fixing member. Such an embodiment is clearly visible in [Fig.6].

[0080] Thus, and in [Fig.6], the lower chassis 51 of the suspension system comprises the fixing portion secured to the second part 31, 41 of said at least one slide 3, 4 by a first fixing member Og1 and a second fixing member Og2.

[0081] The first fixing member Ogl and the second fixing member Og2 are in offset positions along a direction X of said at least one slide 3, 4. The first attachment portion Atl is formed by a first longitudinal end of the strip Bd which is pinched between the fixing portion of the lower chassis 51 and the second part 31, 41 of said at least one slide 3, 4, crossed by the first fixing member Ogl. A second longitudinal end of the strip Bd is pinched between the fixing portion and the second slide part, crossed by the second fixing member Og2. The first longitudinal end of the strip Bd forming the first attachment portion Atl may comprise a first metal eyelet crossed by the first fixing member Ogl and the second longitudinal end tudinal of the strip Bd forming the second attachment portion At2 may comprise a second metal eyelet crossed by the second fixing member Og2. Such eyelets may make it possible to protect the strip.

[0082] Such an embodiment advantageously allows the implementation of a method for assembling a suspended seat according to the present disclosure, in which the at least one flexible link 6, 7 is put in place, by fixing the first longitudinal end of the strip Bd and the second longitudinal end of the strip Bd, advantageously during the assembly of the fixing portion of the lower chassis 51 to the second part 31, 41 of said at least one slide 3, 4, by pinching the first longitudinal end of the strip forming the first attachment portion At1 and the second longitudinal end of the strip forming the second attachment portion At2, between the fixing portion of the lower chassis 51 and the second slide part 31, 41, and the installation of the first fixing member Og1 and the second fixing member Og2 respectively through the first longitudinal end and the second longitudinal end of the strip,the first fixing member Ogl and the second fixing member Og2 respectively joining the second slide part 31, 41 and the fixing portion of the lower chassis 51. The fixing members Og2 and Ogl can be a screw / nut system ensuring tightening by screwing, the screw passing through the strip, in particular textile, directly, or through said metal eyelet.

[0083] According to a second embodiment, said at least one flexible link 6, 7 may be a flexible loop Bel, which is fixed by inserting the flexible loop Bel into a rigid ring 9, integral with the second slide part 31, 41 or with said fixing portion of the lower chassis 51, according to a first possibility, illustrated in figures 8 to 11 for information purposes, then by folding two portions of the loop around the rigid ring 9, and hooking the two folded portions of the loop onto the upper chassis 50.

[0084] Thus and in [Fig.9], we notice the two portions of loops, folded on either side of the rigid ring 9, are hooked onto said upwardly folded wing 502 of the lateral extension 501, this wing carrying in particular the hooking orifice Ac.

[0085] Alternatively, and according to an embodiment not illustrated, the loop is put in place by inserting the flexible loop into a rigid ring 9, secured to the upper frame 50 according to the second possibility, then by folding two portions of the loop around the rigid ring, and hooking the two loop portions onto a support fixed to the second part of the slide.

[0086] According to a third embodiment, said at least one flexible link 6, 7 may comprise a first bracelet Br1, and a second bracelet Br2, and a flexible connecting portion L12, joining the first bracelet Br1 and the second bracelet Br2.

[0087] According to a possibility illustrated in [Fig. 12a], said at least one flexible link 6, 7 can be fixed by inserting the flexible link into a rigid ring 9, integral with the second slide part according to the first possibility, then by folding the connecting portion around the rigid ring, and hooking the first bracelet Br1 and the second bracelet Br2 onto the upper frame 50. The first bracelet Br1 and the second bracelet Br2, folded on either side of the ring 9, can be hooked onto said upwardly folded wing 502 of the lateral extension 501, this wing carrying in particular the hooking orifice Ac.

[0088] Alternatively, said flexible connection is inserted into a rigid ring, secured to the seat frame according to the second possibility, then by folding the connection portion around the rigid ring, and hooking the first strap and the second strap onto the support fixed to the second part of the slide.

[0089] Generally, the two loop portions Bel of said at least one flexible link 6, 7 can be hooked onto a part of the upper chassis 50 carrying an anchoring hole Ac of the seat belt and as illustrated 10, or the first bracelet Brl and the second bracelet Bc2 can be hooked onto a part of the upper chassis carrying an anchoring hole Ac of the seat belt, according to the figure illustrated in [Fig. 12a].

[0090] The second embodiment or the third embodiment may be the subject of an assembly method in which the flexible link is installed, and advantageously without tools.

[0091] Thus, the present disclosure also relates to a method of assembling a suspended seat, in which said at least one flexible link 6, 7 is put in place (advantageously without tools): - according to the second embodiment, by inserting the flexible loop Bel into a rigid ring 9, integral with the second part 31, 41 of said at least one slide according to the first possibility, then by folding two portions of the flexible loop around the rigid ring, and hooking the two folded portions of said loop onto the upper frame 50, or by inserting the flexible loop into a rigid ring, integral with the upper frame according to the second possibility, then by folding two portions of the loop around the rigid ring, and hooking the two folded portions onto the support fixed to the second part of the slide, or alternatively, - according to the third embodiment, by inserting the flexible link into a rigid ring, secured to the second part of said at least one slide according to the first possibility, then by folding the connecting portion around the rigid ring, and attaching the first bracelet Br1 and the second bracelet Br2 to the upper chassis 50, or by inserting said flexible link into a ring rigid, secured to the upper frame 50 according to the second possibility, then by folding the connecting portion around the rigid ring 9, and hooking the first bracelet Br1 and the second bracelet Br2 onto a support fixed to the second part of the slide.

[0092] Generally, the flexible link may be made of a non-elastic material, particularly when it engages with the loop(s), which ensures reliable grip of the link passing through the or each loop.

[0093] On the other hand, and when said at least one flexible link is attached by simply pressing on a hooked part of the upper chassis 50, said flexible link may be made of an elastic material, at least in part, in order to accompany the upper hooked part during the movements permitted by the suspension system. Unwanted detachments of the flexible link are avoided.

[0094] In particular, [Fig. 13] shows an embodiment of a loop comprising an elastic core El and a sheath GA receiving an elastic El. In the rest position of the loop Bl, the sheath is pleated by the action of the elastic core. When the loop Bc is stretched, the elastic core El lengthens until the sheath is tensioned, which limits the lengthening. List of reference signs

[0095] - 1: Suspended seat, - 2. Seated, - 21. Flasks, -3.4 At least one slide, (respectively first slide and second slide) - 30, 40. First part, fixed, (respectively first slide and second slide), -31,41. Second part, mobile, (respectively first slide and second slide), - 5. Suspension system; - 50. Upper chassis, - 500., 501 Lateral extensions, - 51. Lower chassis, - 52. Elastic suspension organ, - 53. Bellows, - 54.55. First arm and second arm, - 56. Articulation axis (between the first and second scissor arms), - 57. Pebbles, 53. 59. Articulation axes, - 6, 7. At least one flexible link, (respectively first flexible link and second flexible line), - Ec. Nut (Seat belt anchor), - Bd Bande (First mode of production), - Atl, At2. First attachment portion and second attachment portion - Bl, B2. First strand and second strand, - Int. Intermediate portion of said at least one flexible link (between the first strand and the second strand) - Ac. Anchor hole (for a seat belt, in particular for a seat belt pin), - Bel. Loop (Second embodiment), - G. Guidance means, - GA. Sheath ([Fig. 13]), - El. Elastic ([Fig. 13]). - Pal, Pa2. First passer and second passer, - Ins. Plastic inserts (passers=), - Brl, Br2. First bracelet and second bracelet (Third embodiment), - PFsup. Upper profile (slide) - PFinf. Lower profile (slide), - 8. Connecting rods (Raising system), - 9. Rigid ring.

Claims

Claims

1. Suspended seat (1) for a vehicle comprising: - a seat (2) comprising a seat frame (20), - a slide system having at least one slide (3, 4) comprising a first part (30, 40), fixed, intended to be anchored to the floor of the vehicle and a second part (31, 41), mobile, sliding relative to the first part, - a suspension system (5) interposed between the seat frame (2) and the slide system, comprising an upper frame (50) and a lower frame (51) between which is interposed a mechanism comprising an elastic suspension member (52), said suspension system being fixed by its lower frame (51) to the second movable part (31, 41) of said at least one slide (3, 4), said suspension system being configured to allow movement of the upper frame (50) relative to the lower frame (51), - a system for limiting the movement of the seat relative to the slide system comprising at least one flexible link (6, 7), having a non-tensioned state in the rest position of the suspension system, said at least one flexible link (6, 7) being configured to tension when the seat frame (20) tilts relative to the slide system, limiting the amplitude of the tilting during a crash, said at least one flexible link (6,7) is configured to be tensioned during tilting, with tensioning of two strands of said at least one flexible link (6, 7), comprising at least a first strand (B1) and at least a second strand (B2), respectively arranged in parallel between the second movable part (31, 41) of said at least one slide, or a fixing portion of the lower chassis (51) straddling and secured to the second part, on the one hand, and the upper chassis (50), on the other hand, on the side of said at least one slide (3, 4) characterized in that said at least one flexible link is hooked by simply pressing on a hooked part of the upper chassis (50), said flexible link being made of an elastic material, at least in part, in order to accompany the hooked part of the upper chassis during the movements permitted by the suspension system.

2. A suspended seat (1) according to claim 1, wherein said at least one flexible link (6, 7) is connected to the upper frame (50) via of a guide means (G) configured to allow limited sliding of said at least one flexible link (6, 7) relative to the upper chassis (50), or alternatively, said one flexible link is connected to the second part of the slide, or to the attachment portion of the lower chassis straddling and secured to the second part by means of a guide means configured to allow limited sliding of said at least one flexible link relative to the second upper part.

3. Suspended seat (1) according to claim 1 or 2, wherein said at least one slide being oriented in a direction X, said at least one first strand (B 1) and said at least one second strand (B2) are in offset positions in the direction X.

4. Suspended seat (1) according to one of claims 1 to 3, wherein the upper frame (50) supports an anchoring hole (Ac) for a seat belt, in particular an anchoring hole for the stalk of a seat belt.

5. Suspended seat (1) according to claim 3 and 4 and in which said at least one first strand (B1) and the at least one second strand (B2) are arranged, in the direction X, in offset positions, on either side of said anchoring orifice (Ac).

6. Suspended seat (1) according to the combination of claim 2 in combination with claim 3 or 5 wherein said at least one first strand (B1) and said at least one second strand (B1) of said at least one flexible link (6;7) are adjoining each other by an intermediate portion (Int) of said at least one flexible link (6;7) cooperating in sliding with the guide means (G), the guide means (G) and said intermediate portion (Int) being configured to slide relative to each other in order to balance the tension of said first strand (B1) and the tension of said second strand (B2), offset in the direction X, during tilting.

7. Suspended seat according to one of claims 1 to 6, in which said at least one flexible link; at least partly elastic is a loop comprising an elastic core (El) and a sheath (GA) receiving an elastic El forming said elastic core (El), and in which the sheath (GA) is pleated by the action of the elastic core in the rest position of the loop (Bl), and when the loop Bc is stretched, the elastic core (El) elongates until the sheath (GA) is tensioned, which limits the elongation.

8. Suspended seat (1) according to one of claims 1 to 7 wherein the suspension system (5) comprises a tubular bellows (53) protecting the mechanism comprising the suspension member (52) received internally to the bellows, the bellows connecting the lower chassis (51) and the upper chassis (50), said least flexible link (6, 7) being engaged with the upper chassis (50), at the level of at least one lateral extension (500, 501) of the upper chassis, projecting laterally in a direction Y, perpendicular to the direction X of the slide in the rest position of the seat, said at least one lateral extension (500, 501) coming in cantilever of the bellows, extending above said at least one slide (3, 4), on the side of said at least one slide (3, 4).

9. Suspended seat (1) according to claims 4 and 8, wherein said lateral extension (500, 501) of the upper frame (50) supports said anchoring hole (Ac) for a seat belt, in particular an anchoring hole for the peduncle of a seat belt.

10. Suspended seat (1) according to one of claims 1 to 6 and 8, 9 wherein the flexible link (6, 7) comprises a first attachment portion (Atl) integral with said at least one first strand (Bl) and a second attachment portion (At2) integral with said at least one second strand, attached respectively to the second movable part (31, 41) of the slide, or to the portion of the lower chassis integral and straddling the second part according to a first possibility, or alternatively the flexible link comprises a first attachment portion (Atl) integral with said at least one first strand (Bl) and a second attachment portion (At2) integral with said at least one second strand, attached respectively to the upper chassis according to a second possibility, and wherein said at least one flexible link (6, 7) engages with the upper chassis (50),at an intermediate portion (Int) of said at least one flexible link between said at least one first strand (B 1) and said at least one second strand (B2) according to the first possibility, or said at least one flexible link (6, 7) engages with a support fixed on the second part of the slide, according to the second possibility, and in which in the case of tilting the at least one flexible link (6, 7) is configured to be tensioned, with tensioning of the two strands (Bl, B2) of said at least one flexible link, comprising said at least one first strand (Bl) formed between the first attachment portion (Atl) and said intermediate portion (Int) and said at least one second strand, (61) formed between the second attachment portion (At2) and said intermediate portion (Int).

11. Suspended seat according to claim 10, wherein said at least one slide (3, 4) is oriented in a direction X: - said at least one first strand (B 1) and said at least one second strand (B2) are in offset positions in the direction X and - the first attachment portion (Atl) and the second attachment portion (At2) are offset in the direction X.

12. Suspended seat according to one of claims 10 or 11, in which said at least one flexible link (6,7) is a strip (Bd) having two longitudinal ends respectively forming the first attachment portion (Atl) and the second attachment portion (At2).

13. Suspended seat according to claim 12, wherein the lower frame (51) of the suspension system comprises the fixing portion secured to the second part (31, 41) of said at least one slide (3, 4) by a first fixing member (Ogl) and a second fixing member (Og2), the first fixing member (Ogl) and the second fixing member (Og2) being in offset positions along a direction X of said at least one slide (3, 4) and wherein the first attachment portion (Atl) is formed by a first longitudinal end of the strip (Bd) which is pinched between the fixing portion of the lower frame (51) and the second part (31, 41) of said at least one slide (3, 4), crossed by the first fixing member (Ogl), and a second longitudinal end of the strip (Bd) which is pinched between the fixing portion and the second slide part, crossed by the second fixing member (Og2).

14. Suspended seat according to claim 13, in which the first longitudinal end of the strip (Bd) forming the first attachment portion (Atl) comprises a first metal eyelet crossed by the first fixing member (Ogl) and the second longitudinal end of the strip (Bd) forming the second attachment portion (At2) comprises a second metal eyelet crossed by the second fixing member (Og2).

15. Suspended seat according to any one of claims 1 to 9 wherein said at least one flexible link (6, 7) is a flexible loop (Bel), in particular said loop of the seat according to claim 7, which is fixed by insertion of the flexible loop (Bel) into a rigid ring (9), integral with the second slide part (31, 41) or said portion fixing the lower chassis (51), according to a first possibility, then by folding two portions of the loop around the rigid ring (9), and hooking the two portions of the loop folded onto the upper chassis (50), or alternatively by inserting the flexible loop into a rigid ring (9), integral with the upper chassis (50) according to the second possibility, then by folding two portions of the loop folded around the rigid ring, and hooking the two portions of the loop folded onto a support fixed to the second part of the slide.

16. Suspended seat according to one of claims 1 to 6, 8, 9 wherein said at least one flexible link (6, 7) comprises a first strap (Brl), and a second strap (Br2), and a flexible connecting portion (L12), joining the first strap (Brl) and the second strap (Br2), and wherein said at least one flexible link (6, 7) is fixed by inserting the flexible link into a rigid ring (9), integral with the second slide part according to the first possibility, then by folding the connecting portion around the rigid ring, and hooking the first strap (Brl) and the second strap (Br2) onto the upper frame (50), or alternatively, by inserting said flexible link into a rigid ring, integral with the seat frame according to the second possibility, then by folding the connecting portion around the rigid ring, and hooking the first strap and the second strap onto the support fixed to the second part of the slide.

17. Suspended seat according to claim 15 or 16 in which the two loop portions (Bel) of said at least one flexible link (6, 7) are hooked onto said part of the upper chassis (50) carrying an anchoring hole (Ac) for the safety belt, or the first strap (Brl) and the second strap (Bc2) are hooked onto a part of the upper chassis carrying an anchoring hole (Ac) for the safety belt.

18. Suspended seat according to one of claims 1 to 17, wherein said at least one slide (3, 4) of the slide system comprises a first slide and a second slide, oriented longitudinally in the X direction, distributed transversely, in a Y direction, on either side of the suspension system, and wherein said at least one flexible link comprises: - a first flexible link (6) connecting the first slide (3) to the upper chassis (50), on the side of the first slide (3) - a second flexible link (7) connecting the second slide (4) to the chassis upper (50), on the side of the second slide (4).

19. Suspended seat (1) according to one of claims 1 to 18 comprising a raising system interposed between the seat frame (20) and the upper frame (50) comprising connecting rods (8) connecting in articulation flanges (21) of the seat frame (20) to the upper frame (50).

20. Method for assembling a suspended seat according to one of claims 13 to 14, in which the at least one flexible link (6, 7) is put in place, by fixing the first longitudinal end of the strip (Bd) and the second longitudinal end of the strip (Bd), during the assembly of the fixing portion of the lower frame (51) to the second part (31, 41) of said at least one slide (3, 4), by pinching the first longitudinal end of the strip forming the first attachment portion (Atl) and the second longitudinal end of the strip forming the second attachment portion (At2), between the fixing portion of the lower frame (51) and the second slide part (31, 41), and putting in place the first fixing member (Ogl) and the second fixing member (Og2) respectively through the first longitudinal end and the second longitudinal end of the strip,the first fixing member (Ogl) and the second fixing member (Og2) respectively joining the second slide part (31, 41) and the fixing portion of the lower chassis (51).,

21. Method for assembling a suspended seat according to one of claims 15 to 17; in which said at least one flexible link (6, 7) is put in place - according to the seat of claim 15, by inserting the flexible loop (Bel) into a rigid ring (9), integral with the second part (31, 41) of said at least one slide according to the first possibility, then by folding two portions of the flexible loop around the rigid ring, and hooking the two folded portions of said loop onto the upper frame (50), or by inserting the flexible loop into a rigid ring, integral with the upper frame according to the second possibility, then by folding the two portions of the loop around the rigid ring, and hooking the two folded portions onto a support fixed to the second part of the slide, or alternatively, - according to the seat of claim 16, by inserting the flexible link into a rigid ring,secured to the second part of said at least one slide according to the first possibility, then by folding the connecting portion around the rigid ring, and attaching the first bracelet, (Brl) and the second strap (Br2) on the upper chassis (50), or by inserting said flexible connection into a rigid ring, secured to the upper chassis (50) according to the second possibility, then by folding the connection portion around the rigid ring (9), and attaching the first strap (Brl) and the second strap (Br2) to a support fixed to the second part of the slide.

Images