WO2024175402A1 - Armature de siege basculante - Google Patents
Armature de siege basculante Download PDFInfo
- Publication number
- WO2024175402A1 WO2024175402A1 PCT/EP2024/053481 EP2024053481W WO2024175402A1 WO 2024175402 A1 WO2024175402 A1 WO 2024175402A1 EP 2024053481 W EP2024053481 W EP 2024053481W WO 2024175402 A1 WO2024175402 A1 WO 2024175402A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frame
- seat frame
- seat
- backrest
- axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
- B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
- B60N2/427—Seats or parts thereof displaced during a crash
- B60N2/42727—Seats or parts thereof displaced during a crash involving substantially rigid displacement
- B60N2/42745—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the back-rest
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/68—Seat frames
- B60N2/682—Joining means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
- F16B31/005—Breakbolts loosening due to the action of an explosive charge
Definitions
- the present invention relates generally to the field of seats.
- a seat frame comprising:
- the invention also relates to a seat comprising such a frame, and a vehicle equipped with such a seat.
- driver's seats installed in motor vehicles allow drivers to adjust their driving positions.
- Passenger seats in these vehicles can also be equipped with this function.
- a seat is known comprising a seat frame and a backrest frame hinged to each other by means of two "gussets" located on either side of the seat.
- Each gusset is in the form of a metal part which is fixed by two bolts to the seat frame and which has an opening at which the backrest is hinged so that it can tilt forward or backward.
- the present invention then proposes to allow the tilting of the backrest using means distinct from this articulation.
- a seat frame as defined in the introduction the means of which for assembling the backrest frame on the seat frame comprise, on each side of the seat frame, two fixing systems, in particular a first fixing system comprising, on the one hand, an axis which passes through two openings provided in the walls of the backrest and/or seat frames, and, on the other hand, two stops resting on either side of said walls to prevent the axis from coming out of the openings.
- two fixing systems in particular a first fixing system comprising, on the one hand, an axis which passes through two openings provided in the walls of the backrest and/or seat frames, and, on the other hand, two stops resting on either side of said walls to prevent the axis from coming out of the openings.
- each first fixing system is equipped with a pyrotechnic charge which is adapted to be activated to explode and release mobility of at least part of the backrest frame relative to at least part of the seat frame.
- the pyrotechnic charge when activated, it causes the deformation or breakage of the axis or one of the stops, so that the first fixing system can no longer perform its initial function of fixing the backrest in relation to the seat.
- gussets are provided on either side of the seat, which are fixed to the seat frame (or respectively the backrest frame) and which form a joint for the backrest frame (or respectively the seat frame).
- the invention proposes to use the means for fixing these gussets to the seat frame (or respectively the backrest frame) in order to allow, in the event of an emergency, the backrest of the seat to be tilted backwards.
- each first means of attachment will be designed in such a way that it is possible to tilt the backrest without having to manually remove the broken pieces of bolts. Indeed, if the axles had to be completely removed once broken, there would have to be a lot of space on either side of the seat, which is not necessarily the case, particularly when the vehicle chassis has become deformed.
- said pyrotechnic charge is provided inside said axis and is adapted to break said axis;
- said axis has a fusible zone of lower resistance
- said pyrotechnic charge is adapted to break said axis at said fusible zone
- said axis has an annular groove which delimits said fusible zone and said pyrotechnic charge is located inside said fusible zone;
- one of the stops forms a screw with the axis, and the other of the stops forms a bolt screwed onto said screw;
- said pyrotechnic charges are controlled via electrical wires, the ends of which located opposite said pyrotechnic charge are fixed in the same electrical connection terminal block;
- the other fixing system is adapted to form a hinge to allow, when the mobility of the backrest frame relative to the seat frame is released, the tilting of the backrest frame relative to the seat frame;
- the invention also relates to a seat comprising a frame as mentioned above, the seat frame and the backrest frame of which are covered with a padding.
- FIG. 1 is a schematic perspective view of a motor vehicle seat according to the invention
- FIG. 2 is a schematic view of part of the means of assembly of the seat and back frames of the seat frame of Figure 1;
- FIG. 3 illustrates two schematic sectional views, along plane A-A of Figure 2, of a fixing system before and after activation of its pyrotechnic charge;
- FIG. 4 is a schematic side view of the seat frame of Figure 1, after activation of the pyrotechnic charge.
- a motor vehicle (car, bus, truck, boat, plane, etc.) generally has a chassis and bodywork elements which delimit a passenger compartment.
- FIG 1 there is shown a seat 1 intended to be installed in the passenger compartment of such a motor vehicle and to be fixed to the floor of this motor vehicle.
- front and rear will be used in relation to the motor vehicle, the front part of an element designating the part of this element which is located on the hood side of the vehicle and the rear part designating the part of this element which is located on the opposite side.
- lower or “bottom” and “upper” (or “top”) will be used interchangeably, with the lower portion of an element meaning that portion of that element which is located on the floor side of the vehicle and the upper portion meaning that portion of that element which is located on the roof side of the vehicle.
- longitudinal will apply to a direction or axis oriented from the front to the rear of the vehicle, parallel to the direction of travel of the vehicle when the steering wheel is in the neutral position.
- transverse will apply to a direction or axis oriented orthogonally to the longitudinal axes and horizontally when the vehicle is traveling on a horizontal road.
- seat 1 typically has a seat 20A, a backrest 10A and a headrest 30A, each comprising a frame and a trim attached to the frame. It should be noted that the frame of the backrest and that of the headrest could be confused.
- the frame 2 of the seat is therefore composed of at least one seat frame 20 and one back frame 10.
- Each of these frames is for example formed of metal parts fixed together.
- the backrest frame 10 and the seat frame 20 each comprise two metal lateral flanks 11, 21, rigidly connected together by metal connecting elements (not visible).
- the two lateral flanks 11, 21 of each frame extend in parallel vertical planes.
- these frames could be presented differently, for example in the form of plastic shells.
- the seat frame 20 could be rigidly fixed to the floor of the vehicle, but it is generally rather intended to be mounted mobile in translation on the floor. As shown in FIG. 1, it is mounted for this purpose on two longitudinal slides 40A each formed of a mobile rail fixed to the seat frame 20, and a fixed rail fixed to the floor and in which the mobile rail slides.
- the backrest frame 10 could be rigidly fixed to the seat frame 20 so that the inclination of the backrest is not adjustable, but it is generally rather designed to be mounted mobile in tilting on the seat frame around a transverse geometric axis, hereinafter called pivot axis A2 (see figure 2).
- assembly means 30 which firstly comprise a metal wall called a gusset 31, which here results from a stamping operation of a sheet metal part.
- This gusset 31 is designed to connect one of the lateral flanks 11 of the backrest frame 10 to one of the lateral flanks 21 of the seat frame 20.
- the gusset 31 is fixed to the lateral flanks 21 of the seat frame 20 (it is therefore considered to be part of this seat frame), and the backrest frame 10 is articulated on it around the pivot axis A2.
- the gusset 31 is placed on the inner side of the side panels 21 of the seat frame 20, but alternatively, it could be placed on the outer side.
- This gusset 31 generally has a triangular shape with rounded peaks, and It has three openings located near its peaks, the first two openings being lower than the third.
- each of them in FIG. 3 preferably have circular shapes. They are located opposite two openings 210 provided in correspondence in the lateral flank 21 of the seat frame 20. These openings 210, 310 here have similar dimensions. Thus, each of the first openings 310 overlaps with an opening 210 provided in correspondence in the lateral flank 21 of the seat frame 20.
- the third opening (figure 2), the one located at the top of the gusset 31, is designed to allow the backrest 10A to tilt around the pivot axis A2.
- it accommodates, for example, a hinge axis 35 fixed to the backrest frame 10. Since this assembly is well known to those skilled in the art, it will not be described in detail here.
- the assembly means 30 of the backrest frame 10 on the seat frame 20 comprise two fixing systems 32, 33 each engaged through one of the first two openings 310 of the gusset and the corresponding opening 210 provided in the lateral flank 21 of the seat frame 20 in order to rigidly fix the gusset 31 to this lateral flank 21.
- These two fastening systems 32, 33 are provided so that, if necessary, at least one of them can give way. It will be considered here that only one of these two fastening systems 32, 33 can give way, the other forming a hinge so that the gusset and the backrest can pivot backwards, as illustrated in FIG. 4. Alternatively, the two fastening systems 32, 33 can be designed to give way.
- the fastening system 32 which is intended to yield is the one which is engaged through the front opening of the gusset 31, while the fastening system 33 which is intended to allow the backrest to tilt relative to the seat is the one located furthest to the rear.
- the front fixing system 32 is the one which is more precisely the subject of the present invention.
- This fixing system comprises an axis which passes through the two openings 211, 311 and which is equipped with two stops mounted on this axis, on either side of the gusset 31 and the lateral flank 21 of the seat frame 20.
- this fastening system 32 is in the form of a bolt comprising a so-called safety screw 320 and a bolt 329 (forming one of said stops).
- the safety screw 320 has a head 321 (forming the other of said stops) and a threaded body 322 (forming said axis). It further comprises here a free non-threaded end located in the extension of the threaded body 322.
- the head 321 of the security screw 320 has a hexagonal-shaped top. Of course, it could have a different shape (for example an imprint for an Allen key).
- the safety screw 320 is elongated along a geometric axis passing through the centers of the aforementioned openings, hereinafter called the safety geometric axis A1.
- This bolt makes it possible to retain the gusset 31 in support against the lateral flank 21 of the seat frame 20.
- This 320 safety screw is special in that it is equipped with a 325 pyrotechnic charge.
- This load could be located outside the screw. However, for reasons of safety and ease of use in particular, it is preferably housed inside the safety screw 320, and more precisely here inside the threaded body 322 of this screw.
- the bolt is therefore designed to break when the load is activated.
- the bolt formed by the safety screw 320 and the nut 329 could be of the ejector type, generating an ejection effect of the two pieces of the bolt after the explosion of the pyrotechnic charge 325.
- the bolt will be more of a traction type, generating no thrust on either part of the bolt after the explosion of the 325 pyrotechnic charge.
- the pyrotechnic charge 325 is preferably housed in the threaded body 322.
- the threaded body 322 has a fusible zone 323 located between the head 321 and the threaded part of the threaded body 322.
- the threaded body 322 has an annular groove of revolution around the axis safety A1, which therefore forms a reduction in section and thus a fusible zone.
- This groove extends hollow relative to the rest of the threaded body 322. It has an invariable profile all around the geometric safety axis A1 but as a variant, it could be otherwise. Typically, it could be formed of a plurality of radial holes distributed all around this axis.
- the fusible zone 323 makes it possible to locally significantly reduce the tensile strength of the safety screw 320.
- This annular groove is positioned along the safety screw 320 so that, once the nut is tightened on the screw, the bottom of the groove is in the support plane of the gusset against the lateral flank 21 of the seat frame 20.
- the pyrotechnic charge is housed in the threaded body 322 of the safety screw, at the level of this support plane.
- the pyrotechnic charge 325 is intended to be electrically activated. It is therefore connected to a sheathed electrical wire 326.
- the sheathed electrical wires 326 of the pyrotechnic charges 325 provided on either side of the backrest meet at their ends, and are connected to the same terminal block.
- This terminal block is for example located under the seat cover (invisibly), so that emergency service personnel can connect a portable battery to it if necessary in order to detonate the charges and cause the safety screws 320 to break.
- the other fastening system 33 that engaged through the rear opening of the gusset 321, is here in the form of a bolt.
- the tightening torque of this bolt will preferably be such that, when the gusset 31 is fixed to the seat frame 20 by this single bolt (on each side of the seat), it is possible to manually force the backrest to tilt backwards, around the geometric axis of this bolt, hereinafter called hinge axis A3.
- hinge axis A3 the geometric axis of this bolt
- it will be a bolt identical to that of the 32 fastening system (with a fusible zone and a pyrotechnic charge). This will not only make it possible to restrict the number of part references required for the assembly of the seat, but also to completely separate the backrest from the seat if necessary, by causing the four screws fixing the gussets to break.
- the electrical wires of the four bolts will be connected within the same electrical connection terminal block accessible to the emergency services.
- the electrical wires 326 of the pyrotechnic charges 325 of the front fixing systems 32 will not be electrically connected to the electrical wires of the pyrotechnic charges of the rear fixing systems 33, so as to leave the emergency services the choice of releasing only the tilting mobility of the backrest towards the rear, or of completely uncoupling the backrest so as to be able to extract it from the passenger compartment.
- the first operation will consist of possibly removing the rear seats of the vehicle which would obstruct access to seat 1 where the victim is located.
- the present invention is in no way limited to the embodiment shown, but the person skilled in the art will be able to provide any variant in accordance with the invention.
- the bolt engaged in the front opening of the gusset could be replaced by a shouldered pin equipped with a circlip or a pin.
- the safety screw could be provided with no fusible zone and the circlip or the pin could be designed to yield.
- this variant is not preferred since it would require the safety screws to then be removed from the openings in order to tilt the seat back.
- the openings provided in the gusset or the lateral flank of the seat frame could have shapes different from those illustrated in the figures (typically octagonal).
- the gusset could be located on the outer side of the lateral flank of the seat frame.
- the safety screw could then optionally be oriented head- spade compared to the illustrated embodiment, with its head oriented towards the inside of the seat.
- the gusset could belong not to the seat frame but to that of the backrest.
- the two fixing systems (32, 33) would therefore make it possible to fix the gusset to the corresponding lateral flank of the backrest.
- the backrest frame could be fixed to the seat frame without any mobility.
- the two bolts provided on each side of the seat would therefore make it possible to directly fix one of the frames to the other of the frames.
- the seat frame could comprise, in addition to the two lateral sides fixed by the crosspieces, a support fixed to the movable rails and connecting rods which are interposed between the lateral sides and this support. This system of connecting rods would make it possible to raise or lower the seat surface relative to the floor of the vehicle. In this mode, the backrest frame would then be coupled, not to the lateral sides of the seat frame, but to the support itself.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Seats For Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480010192.6A CN120641298A (zh) | 2023-02-20 | 2024-02-12 | 倾斜座椅框架 |
| KR1020257025657A KR20250153769A (ko) | 2023-02-20 | 2024-02-12 | 틸팅 시트 프레임 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2301550A FR3145903B1 (fr) | 2023-02-20 | 2023-02-20 | Armature de siège basculante |
| FRFR2301550 | 2023-02-20 | ||
| FRFR2313402 | 2023-12-01 | ||
| FR2313402A FR3145904B1 (fr) | 2023-02-20 | 2023-12-01 | Armature de siège basculante |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024175402A1 true WO2024175402A1 (fr) | 2024-08-29 |
Family
ID=89845175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/053481 Ceased WO2024175402A1 (fr) | 2023-02-20 | 2024-02-12 | Armature de siege basculante |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20250153769A (fr) |
| CN (1) | CN120641298A (fr) |
| WO (1) | WO2024175402A1 (fr) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2870179A1 (fr) * | 2004-05-17 | 2005-11-18 | Daniel Armand | Procede et systeme de protection des passagers d'un vehicule |
| GB2429640A (en) * | 2005-09-06 | 2007-03-07 | Autoliv Dev | Vehicle seat with removable backrest |
| FR2917025A1 (fr) * | 2007-06-05 | 2008-12-12 | Faurecia Sieges Automobile | Ensemble d'absorption d'energie muni de deux dispositifs d'absorption |
| US20150042133A1 (en) * | 2011-09-21 | 2015-02-12 | Nhk Spring Co., Ltd. | Vehicle seat |
-
2024
- 2024-02-12 CN CN202480010192.6A patent/CN120641298A/zh active Pending
- 2024-02-12 WO PCT/EP2024/053481 patent/WO2024175402A1/fr not_active Ceased
- 2024-02-12 KR KR1020257025657A patent/KR20250153769A/ko active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2870179A1 (fr) * | 2004-05-17 | 2005-11-18 | Daniel Armand | Procede et systeme de protection des passagers d'un vehicule |
| GB2429640A (en) * | 2005-09-06 | 2007-03-07 | Autoliv Dev | Vehicle seat with removable backrest |
| FR2917025A1 (fr) * | 2007-06-05 | 2008-12-12 | Faurecia Sieges Automobile | Ensemble d'absorption d'energie muni de deux dispositifs d'absorption |
| US20150042133A1 (en) * | 2011-09-21 | 2015-02-12 | Nhk Spring Co., Ltd. | Vehicle seat |
Also Published As
| Publication number | Publication date |
|---|---|
| CN120641298A (zh) | 2025-09-12 |
| KR20250153769A (ko) | 2025-10-27 |
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