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
  • B60N2/42709—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
  • B60N2/4207—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
  • B60N2/4228—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 rear
• • 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
  • B60N2/4249—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 fixed structures, i.e. where neither the seat nor a part thereof are displaced during a crash
• • 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
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F1/00—Springs
  • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
  • F16F1/04—Wound springs
  • F16F1/12—Attachments or mountings
  • F16F1/123—Attachments or mountings characterised by the ends of the spring being specially adapted, e.g. to form an eye for engagement with a radial insert
• • 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
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F1/00—Springs
  • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
  • F16F1/04—Wound springs
  • F16F1/12—Attachments or mountings
  • F16F1/128—Attachments or mountings with motion-limiting means, e.g. with a full-length guide element or ball joint connections; with protective outer cover

Definitions

• the present invention relates to a back rest for a vehicle seat, comprising an outer frame and a support member located inside the outer frame, a number of spring means being disposed between the outer frame and the support member.
• the present invention further relates to a spring means with limited elongation length, comprising a draw spring with a first and a second anchorage member disposed at opposite ends of the draw spring, and a limiter device for limiting the maximum elongation length of the draw spring.
• the present invention has for its object to realise a vehicle seat which springs more or less normally on low loading, but which becomes rigid when the maximum permitted elongation of the spring has been reached. This object is to be attained without the need of modifying existing seat designs and constructions.
• the present invention further has for its object to realise a spring means with limited elongation length, without loose parts, of a size which does not substantially differ from a conventional spring means and with a simple mounting procedure.
• the object according to the present invention will be attained if such spring means is given the characterizing feature that the limiter device extends from the second anchorage member of the draw spring, or a device fixedly united therewith, in the longitudinal direction of the draw spring to a region in the proximity of a first mounting device with which the first anchorage member of the draw spring cooperates, the limiter device being, in its free end, provided with an engagement member which, on elongation of the spring means, is disposed to engage with an arrest member which is fixed in relation to the first mounting device. Further advantages will be attained according to the present invention if the subject matter of the present invention is also given one or more of the characterizing features as set forth in appended Claims 2 to 3 and 5 to 11.
• Fig. 1 is a plan view of a frame for a back rest according to the present invention in which the spring means according to the present invention has been mounted;
• Fig. 2 is a plan view of a spring means according to the present invention.
• Fig. 3 shows the spring means according to Fig. 2 in the mounted state and partly elongated
• Fig. 4 is a plan view of an alternative embodiment of the spring means according to the present invention.
• a conventional draw spring is often designed as a helical, loosely or densely coiled spring with an anchorage member at each end.
• the helical portion of the draw spring will be designated below as the spring body 2.
• the anchorage members may be of varying appearance, but are often designed as hooks.
• a back rest 13 for a vehicle seat is, inter alia, constructed from an outer frame 9, the seat back frame.
• a support member 12 which, in the preferred embodiment, consists of a wire lattice which may be secured in an inner frame or be provided with thicker frame portions 11 at least along opposite, vertical edges. This is springingly connected to the outer frame 9.
• the seat back frame 9 and the wire lattice 12 are interconnected with conventional draw springs.
• these are replaced by a number of spring means 1 with a limited elongation length.
• Fig. 1 shows a back rest for a vehicle seat according to the present invention.
• the spring means 1 are mounted between the outer frame 9 of the seat back and an inner frame 11 of a wire lattice 12.
• the seat back frame 9 is provided with mounting devices in the form of lugs 10 with anchorage holes 7 (hereafter referred to as the second mounting device 7, 10).
• the support member 12 has corresponding mounting devices 8 (hereafter referred to as first mounting devices) for the opposite ends of the spring means 1. These mounting devices are located on the frame 11 of the wire lattice 12, but may also constitute the frame 11 proper or vertical side bars to the support member 12.
• the spring means 1 according to the present invention may be retrofitted to the previously existing construction without difficulty.
• the spring means require no great amount of space, and do not consist of more components than a conventional draw spring.
• Fig. 2 shows a spring means according to the present invention.
• a draw spring is provided in each end of its spring body 2 with anchorage members 3 and 4.
• the anchorage member 4 (which will below be referred to as the second anchorage member, while the anchorage member 3 at the opposite end of the spring body will be referred to as the first anchorage member) is united to a limiter device 5 which runs in the longitudinal direction of the draw spring, e.g. substantially parallel with the spring body 2 without being in contact with it.
• the limiter device may advantageously be of one piece manufacture with the rest of the spring means.
• an engagement member 6 In the opposite end of the limiter device 5 in relation to the anchorage member 4, there is disposed an engagement member 6.
• the engagement member 6 is disposed in spaced apart relationship to the first anchorage member 3 in the longitudinal direction of the spring means 1. When the draw spring is stretched, the anchorage member 3 and the engagement member 6 will be displaced in relation to one another. The second anchorage member 4 and the engagement member 6 are always located at a substantially constant distance from one another. This distance is the same as the maximum elongation length of the spring means.
• the engagement member 6 on the limiter device 5 is placed in order, on elongation of the spring body 2, to come into abutment against an arrest member which is fixed in relation to the first anchorage member, i.e. in relation to the support member 12.
• an arrest member which is fixed in relation to the first anchorage member, i.e. in relation to the support member 12.
• Fig. 3 shows the spring means 1 mounted between the first mounting device 8 and the second mounting device 7. When these points are separated, the spring body 2 will be stretched out until such time as the engagement member 6 engages with the mounting device 8. The maximum elongation length of the spring means has then been reached.
• the first mounting device 8 serves the function of an arrest member.
• the function is substantially the same, but this embodiment may be preferable in the event of extreme shortage of space.
• the anchorage member 4 may, as illustrated in Fig. 4, be designed as a hook in that the production material is folded double in the hook.
• Another alternative is to design the anchorage member 4 as a lug.
• the mounting device which is intended to engage with the anchorage device 4 may, in such instance, need to be designed differently than if the limiter device 5 had lain outside the spring body 2.
• the mounting device 7 may include a hook or lug as described above, in which a slot is provided from the edge of the lug to the hole.
• the slot may either be straight or curved.
• the limiter device 5 is disposed inside the spring body 2, these two parts of the spring means should not abut against one another, so as to avoid making any noise.
• Another method of avoiding noise is provide the limiter device 5 with a surface coating which reduces squeaking.
• the anchorage members 3 and 4 and the engagement member 6 may be given different designs depending upon the surroundings in which the spring means 1 is intended to be mounted. In most cases, the design of the anchorage members 3 and 4 corresponds to that in existing draw springs, i.e. they are designed as hooks which may be caught in a corresponding opening or lug. In many cases, the engagement member 6 may also be a hook.
• the arrest member consists of the first mounting device 8, i.e. the same mounting device with which the first anchorage member engages.
• the engagement member 6 may be caused to engage with some other arrest member which is fixed in relation to the mounting device 8.
• the maximum elongation length of the spring means may be changed as compared with that described above. A shorter maximum elongation length will, for example, be obtained if the arrest member intended for the engagement member 6 is located beyond the mounting device 8 with which the anchorage member 3 engages.
• this is put into effect by engagement with the outermost coil in the helical portion of the spring body.
• One advantage is that no external mounting device is required for the engagement member 6, and it is thereby possible to save space.
• the inner end portion of the spring body constitutes the arrest member.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Aviation & Aerospace Engineering (AREA)
• Transportation (AREA)
• Springs (AREA)
• Seats For Vehicles (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20411085

Family Applications (1)

Country Status (4)

Cited By (8)

Citations (5)

• 1998
  • 1998-04-24 SE SE9801451A patent/SE512632C2/sv not_active IP Right Cessation
• 1999
  • 1999-04-08 WO PCT/SE1999/000572 patent/WO1999055553A1/en not_active Application Discontinuation
  • 1999-04-08 EP EP99947030A patent/EP1071576A1/en not_active Withdrawn
  • 1999-04-08 AU AU42975/99A patent/AU4297599A/en not_active Abandoned

Patent Citations (5)

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