GB2494222A - System to regulate and restrict forward movement of a seat back in an accident - Google Patents

System to regulate and restrict forward movement of a seat back in an accident Download PDF

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Publication number
GB2494222A
GB2494222A GB201203222A GB201203222A GB2494222A GB 2494222 A GB2494222 A GB 2494222A GB 201203222 A GB201203222 A GB 201203222A GB 201203222 A GB201203222 A GB 201203222A GB 2494222 A GB2494222 A GB 2494222A
Authority
GB
United Kingdom
Prior art keywords
seat
seat back
forward movement
accident
stop
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.)
Withdrawn
Application number
GB201203222A
Other versions
GB201203222D0 (en
Inventor
Thomas Scruton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB201203222D0 publication Critical patent/GB201203222D0/en
Publication of GB2494222A publication Critical patent/GB2494222A/en
Withdrawn legal-status Critical Current

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
    • B60N2/4207—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 characterised by the direction of the g-forces
    • B60N2/4214—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 characterised by the direction of the g-forces longitudinal
    • 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
    • B60N2/4207—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 characterised by the direction of the g-forces
    • B60N2/4214—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 characterised by the direction of the g-forces longitudinal
    • B60N2/4221—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 characterised by the direction of the g-forces longitudinal due to impact coming from the front
    • 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
    • B60N2/42709—Seats or parts thereof displaced during a crash involving residual deformation or fracture of the structure
    • 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

Abstract

A system fitted to a vehicle passenger seat with the seat back 4 pivoting 2 relative to the seat base 5. When a force is applied to the seat back in the forward direction by either the seatbelts preventing forward movement of the passenger sitting in the seat, or a passenger colliding with the back of the seat the seat back will move forward in a controlled manner by a part 1 stretching until the seat back 4 comes into contact with a stop 3, which is part of the seat base in the example shown in the drawing. If the force then increases after reaching this point, forward movement is kept to a minimum by the stop 3. This reduces injury to passengers impacting the seat from behind, but allowing the seatbelt to function for the person sitting in the seat. The device 1 may have an area designed to break under a specified load.

Description

System to regulate and restrict forward movement of a seat back in an accident Seats in road passenger vehicles are required to meet regulations to ensure that any chance of injury to passengers in accidents is reduced. In the case of a seat with seatbelts fitted, one of these regulations is for seat anchorages; this requires the points on the seat to where the seatbelt is attached to withstand specified test loads in a forward direction to simulate a person belted into the seat during an accident. Another regulation is seat strength, which has a requirement that if the seat is hit from behind by a passenger during an accident, the seat will move a specified amount to reduce the harm inflicted on the person and this is tested by applying forces in the forward direction onto the back of the seat using shaped blocks and measuring how far they move. The forces involved in the anchorage test are far greater than those in the seat strength test. The forces applied in both tests are a lot larger than those encountered by the seats on a day to day basis, but the design issue here is that the tests are contradictory in their requirements, as the lower force requires maximum movement, whilst the Larger force requires minimaL movement.
To overcome this problem, the seat is designed with the seat back (4) being ailowed to pivot (2) relative to the seat base (5). When a force is applied to the seat back in the forward direction (by either the seatbelts preventing forward movement of the passenger sitting in the seat, or a passenger colliding with the back of the seat) the seat back will be allowed to move forward in a controlled manner by a part (1) stretching until the seat back (4) comes into contact with the stop (3), which is part of the seat base in the example shown in the drawings. If the force then increases after reaching this point, forward movement is kept to a minimum by the stop (3). This reduces injury to passengers impacting the seat from behind, but allowing the seatbelt to function for the person sitting in the seat.
The system will be described referring to the accompanying figures as examples, only the seat frame (no cushions etc) is shown for clarity: The seat back (4) is able to move relative to the seat base (5) about a pivot (2), in this case the pivot (2) is attached to the seat base (5), although in other designs it could be attached to the seat back (4). This movement is restricted by a part (1) (in this particular example a steel strip) attached to both the base (5) and the back (4) which will resist but allow a steady forward movement under a large force, this is to prevent small bumps and other forces allowing the seat to flex excessively. The part (1) is designed to allow the back (4) to move forwards the correct amount to satisfy the seat strength test just as the seat back (4) meets the stop (3), which is a reinforced area of the seat base (although it could be part of the seat back designed to meet the seat base). In this example it is a piece of box section, although some other rigid piece could be used.
If the seatbelts were being pulled, the load could continue to increase on the seat back but the stop (3) would provide adequate resistance to the additional force, allowing the seat back to remain in the same position. Figures 1-3 show the seat in its original configuration, Figure 4 shows the system under a load equal or larger than that of the seat strength test.
The part (1) may have one or more areas deliberately weakened to allow them to stretch or break (la) under loading to allow a coritrofled predictable movement and to ensure the seat back (4) moves forward far enough to satisfy seat strength requirements.

Claims (1)

  1. <claim-text>Claims 1. A system fitted to a passenger vehicle seat comprising of a pivoting seat back restricted in movement by a device acting as a stop, and a device to allow steady forward movement until the seat back meets the stopping device when under loads encountered during an accident.</claim-text> <claim-text>2. .4 system according to claim 1, in which the device allowing steady forward movement has a narrower section or other area designed to neck or break under a specified load during the forward motion.</claim-text>
GB201203222A 2011-09-01 2012-02-24 System to regulate and restrict forward movement of a seat back in an accident Withdrawn GB2494222A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201115108A GB201115108D0 (en) 2011-09-01 2011-09-01 A device to control deflection of a seat back to enable it to meet 74/408/EEC as amended & ECE R80. In addition to allow it to meet 76/115/EEC as amended & EC

Publications (2)

Publication Number Publication Date
GB201203222D0 GB201203222D0 (en) 2012-04-11
GB2494222A true GB2494222A (en) 2013-03-06

Family

ID=44882059

Family Applications (2)

Application Number Title Priority Date Filing Date
GB201115108A Ceased GB201115108D0 (en) 2011-09-01 2011-09-01 A device to control deflection of a seat back to enable it to meet 74/408/EEC as amended & ECE R80. In addition to allow it to meet 76/115/EEC as amended & EC
GB201203222A Withdrawn GB2494222A (en) 2011-09-01 2012-02-24 System to regulate and restrict forward movement of a seat back in an accident

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB201115108A Ceased GB201115108D0 (en) 2011-09-01 2011-09-01 A device to control deflection of a seat back to enable it to meet 74/408/EEC as amended & ECE R80. In addition to allow it to meet 76/115/EEC as amended & EC

Country Status (1)

Country Link
GB (2) GB201115108D0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10737592B2 (en) 2018-05-30 2020-08-11 Ford Global Technologies, Llc Seat back rotation limiter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877748A (en) * 1974-02-04 1975-04-15 Budd Co Vehicle safety seat
US4145081A (en) * 1976-12-22 1979-03-20 Ti Accles & Pollock Limited Vehicle seat
EP0543049A1 (en) * 1991-11-22 1993-05-26 Ignaz Vogel GmbH &amp; Co KG, Fahrzeugsitze Passenger seat
US6209955B1 (en) * 1998-10-21 2001-04-03 Johnson Controls Technology Company Vehicle seat with a yielding recliner stop
WO2001040015A1 (en) * 1999-11-30 2001-06-07 New Washington Investment Company, Llc Shock absorbing vehicle seat frame
US20050206205A1 (en) * 2004-02-25 2005-09-22 Nelson Erik K Motion controlling plate for seat and seat system for a mobile vehicle
US20110140488A1 (en) * 2009-12-14 2011-06-16 Marriott Brandon S Seat assembly for a vehicle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877748A (en) * 1974-02-04 1975-04-15 Budd Co Vehicle safety seat
US4145081A (en) * 1976-12-22 1979-03-20 Ti Accles & Pollock Limited Vehicle seat
EP0543049A1 (en) * 1991-11-22 1993-05-26 Ignaz Vogel GmbH &amp; Co KG, Fahrzeugsitze Passenger seat
US6209955B1 (en) * 1998-10-21 2001-04-03 Johnson Controls Technology Company Vehicle seat with a yielding recliner stop
WO2001040015A1 (en) * 1999-11-30 2001-06-07 New Washington Investment Company, Llc Shock absorbing vehicle seat frame
US20050206205A1 (en) * 2004-02-25 2005-09-22 Nelson Erik K Motion controlling plate for seat and seat system for a mobile vehicle
US20110140488A1 (en) * 2009-12-14 2011-06-16 Marriott Brandon S Seat assembly for a vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10737592B2 (en) 2018-05-30 2020-08-11 Ford Global Technologies, Llc Seat back rotation limiter

Also Published As

Publication number Publication date
GB201115108D0 (en) 2011-10-19
GB201203222D0 (en) 2012-04-11

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)