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
  • B60N2/68—Seat frames
  • B60N2/686—Panel like structures
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C7/00—Parts, details, or accessories of chairs or stools
  • A47C7/02—Seat parts
  • A47C7/029—Seat parts of non-adjustable shape adapted to a user contour or ergonomic seating positions

Definitions

• the present invention relates to a seat plate for supporting the pelvis of a person sitting on a seat, e.g. a vehicle seat.
• the present invention has the object of forming a seat plate positioning the pelvis better than known solu ⁇ tions both with respect to gliding and to turning, without causing high contact pressure against nerves or muscles.
• the invention is distinguished substantially in that the seat plate is formed on its upper side with two raised scythe-shaped ridges, symmetrically situated relative a longitudinal centre line, and in that each ridge includes a substantially transverse ridge portion which extends out ⁇ wards and curves slightly backwards, and a substantially longitudinal ridge portion which extends backwards and slightly curves outwards, the ridges being contoured to support the seat bone protuberances of the pelvis substan ⁇ tially on their forward and inner sides.
• a seat plate formed in accordance with the invention positions the pelvis in all directions by the seat bone protuberances resting against the mentioned ridges on the seat plate.
• the seat bone protuberances are the lower parts of the hip-bone on which the pelvis rests when a person sits on a flat, hard substructure.
• the centre-to-centre distance between the seat bone protuberances is practically the same for all people irrespective of bodily build. It is thus possible to form the seat plate so that it is expe ⁇ rienced as comfortable for all kinds of people.
• the ridges come aginst the insides of the seat bone protuberances. There is thus avoided concentrated load, inter alia, on the sciatic nerves.
• the forward and rear portions of the seat plate are implemented flat for avoiding concentrated load on muscles and nerves, and the side edges of the seat plate are formed such as to connect onto the remaining implementation of a seat.
• Fig. 1 is a longitudinal section of a vehicle seat equipped with an inventive seat plate.
• Fig. 2 is a view from above of the seat plate.
• Fig. 3 is a cross section A-A through the seat plate of Fig. 2, and
• Fig. 4 is a longitudinal section B-B through the seat plate according to Fig. 2.
• a seat 2 In a vehicle seat 1 , exemplified in Fig. 1 , there is included a seat 2 and a back support 4 attached to the sides of the seat with the aid of conventional jointing fittings 3.
• the base of the seat 2 is a steel frame 5, to which a seat bottom 6 is resiliently attached.
• a seat pad 7 of elastic material is mounted on the seat bottom 6.
• the seat pad 7 is preferably moulded from a cold setting poly- urethane foamed material and surrounded by a textile cover 8.
• the underside of the seat pad 7 is formed with a recess
• the recess 9 is formed complemental to the shape of the seat plate 10. Apart from fitting into the shape of the recess 9, the seat plate 10 is located by an adhesive joint (not shown) between the seat plate 10 and the seat pad 7. The underside of the seat plate is flat, and in its fitted position it joins up with the underside of the seat pad 7, which is also flat.
• the exemplified seat plate 10 is symmetrically formed relative to a longitudinal centre line 12.
• the upper side of the seat plate 10 is according to the invention implemented with two raised scythe-shaped ridges
• Each of these ridges 11 includes a substantially trans ⁇ verse, forward ridge portion 13, at its innermost end connecting via a curve 15 to a substantially.longitudinal ridge portion 14. From the inner curve 15, the transverse ridge portion 13 curves slightly backwards and tapers into the basic plane of the seat plate 10 just before the side edge of the seat plate. The longitudinal ridge portion 14 extends from the inner curve 15, and curves obliquely outwards to taper into the baseplane of the seat plate 10 just before the rear edge of the seat plate 10.
• a depression or so-called valley 16 is formed between the transverse ridge portion 13 and the longitudinal ridge portion 14 there is formed a depression or so-called valley 16, at least in the vicinity of the inner curve 15, the valley having an extension backwards/ outwards and forming an angle oc relative the longitudinal symmetrical axis 12.
• the angle ⁇ is preferably about 52°, but other angles between 40 and 60 may also provide an acceptable effect.
• longitudinal depression or valley 17 is also formed between the two longitudinal ridge portions 14, as will be seen from Fig. 3.
• the seat plate 10 In front of and behind the ridge portions 13,14, the seat plate 10 has a substantially flat extension which is thinned out towards the respective. edges of the seat plate
• the seat plate 10 is made from a polyurethane foamed material with an interior porous cell structure 19 and an integrated soft homogeneous skin 30 with a thickness of about 1-1.5 mm.
• the implementation of the seat plate 10 is condi ⁇ tioned by the shape of the pelvis of a person sitting on the seat.
• the pelvis .includes two so-called seat bone pro ⁇ tuberances which are the parts of the pelvis which take up the greatest load when a person sits on a completely flat and hard substructure.
• the centre-to-centre distance between the seat bone protuberances is practically just as great, about 107 mm, for all people, independent of their build.
• the distance between the scythe-shaped ridges is therefore adjusted so that the seat bone protuberances become positioned in the valleys 16 formed between the different ridge portions 13,14.
• the transverse ridge por- tions 13 bear against the forward of the seat bone protu ⁇ berances, while the longitudinal ridge portions 14 bear against the insides of the seat bone protuberances, resulting in that the pelvis is positioned both longitu ⁇ dinally and transversely.
• the rear recess 18 of the seat plate 10 is condi ⁇ tioned by the position of the caudal vertebra varying relative the seat bone protuberances for different persons.
• the recess 18 allows the caudal vertebra to assume a suitable position without bearing against the seat plate 10.
• the invention is not confined to the exemplified embodiment, but within the scope of the following claims it can be implemented differently as a separate or integrated unit in a seat for a person.
• the seat plate may also be formed in a material other than the exemplified polyurethane foamed material.

Landscapes

• Engineering & Computer Science (AREA)
• Aviation & Aerospace Engineering (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Seats For Vehicles (AREA)
• Mattresses And Other Support Structures For Chairs And Beds (AREA)
• Chair Legs, Seat Parts, And Backrests (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20352159

Family Applications (1)

Country Status (6)

Cited By (2)

Families Citing this family (7)

Citations (7)

Family Cites Families (4)

• 1983
  • 1983-08-10 SE SE8304347A patent/SE451108B/sv not_active IP Right Cessation
• 1984
  • 1984-08-07 EP EP84903094A patent/EP0153360B1/en not_active Expired
  • 1984-08-07 US US06/719,277 patent/US4637651A/en not_active Expired - Fee Related
  • 1984-08-07 WO PCT/SE1984/000270 patent/WO1985000735A1/en active IP Right Grant
  • 1984-08-07 JP JP59503101A patent/JPS60501990A/ja active Pending
  • 1984-08-07 DE DE8484903094T patent/DE3466926D1/de not_active Expired

Patent Citations (7)

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