Vehicle seat and design method for same

Patent metadata

Field	Value
Publication number	US-11377004-B2
Application number	US-201816633833-A
Country	US
Kind code	B2
Filing date	Jul 27, 2018
Priority date	Jul 27, 2017
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

Abstract

Disclosed is a vehicle seat (1) comprising a seat cushion (2) and a seat back (4), wherein the seat cushion and the seat back are comprised of: a frame structure (8) to be fixed to the vehicle body; and a seating member (10) supported by the frame structure having an elastic deformation property and a vibration damping property and allow an occupant to be seated therein, and wherein the vehicle seat satisfies the following relationship: DS/DF≥20, where DS denotes a deformation amount of the seating member itself in a situation where a load W is applied at a position XS of the seating member, and DF denotes a displacement of a position XF of the frame structure corresponding to the position XS, in a situation where the frame structure is fixed to the vehicle body, and the given load W is applied at the position XF.

First claim

The invention claimed is:

1. A vehicle seat mountable to a vehicle body of a vehicle and comprising a seat cushion and a seat back, the vehicle seat comprising:
a frame structure to be fixed to the vehicle body; and
a seating member supported by the frame structure and configured to have a given elastic deformation property and a given vibration damping property and allow an occupant to be seated therein,
wherein the vehicle seat satisfies the following relationship: D S /D F ≥20, where D S denotes a deformation amount of the seating member itself in a situation where a given load W is applied at a given position X S of the seating member, and D F denotes a displacement amount of a position X F of the frame structure corresponding to the given position X S , in a situation where the frame structure is fixed to the vehicle body, and the given load W is applied at the position X F .

2. The vehicle seat according to claim 1 , wherein the seating member comprises a member made from urethane foam and having a given elastic deformation property and a given vibration damping property, and a spring made from metal and having a given elastic deformation property.

3. The vehicle seat according to claim 1 , wherein the position X F at which the load is applied to the frame structure is a position corresponding to a center-of-gravity position of the thorax of the seated occupant, and wherein the frame structure is formed such that a ratio (W/D F ) of the load W to the displacement amount D F in the situation where the load W is applied at the position X F is 70 N/mm or more.

4. A design method for a vehicle seat mountable to a vehicle body of a vehicle and comprising a seat cushion and a seat back, the vehicle seat comprising: a frame structure to be fixed to the vehicle body; and a seating member supported by the frame structure and configured to have a given elastic deformation property and a given vibration damping property and allow an occupant to be seated therein, the design method comprising the steps of:
designing the seating member, and determining, by measurement or calculation, a deformation amount D S of the designed seating member itself in a situation where a given load W is applied at a given position X S of the designed seating member;
designing the frame structure, and determining, by measurement or calculation, a displacement amount D F of a position X F of the designed frame structure corresponding to the given position X S , in a situation where the designed frame structure is fixed to the vehicle body, and the given load W is applied at the position X F ; and
checking whether or not the deformation amount D S and the displacement amount D F satisfy the following relationship: D S /D F ≥20, and, if not, modifying the seating member, the frame structure, and/or a mounting structure of the frame structure to the vehicle body, so as to satisfy the relationship: D S /D F ≥20.

5. The vehicle seat according to claim 2 , wherein the position X F at which the load is applied to the frame structure is a position corresponding to a center-of-gravity position of the thorax of the seated occupant, and wherein the frame structure is formed such that a ratio (W/D F ) of the load W to the displacement amount D F in the situation where the load W is applied at the position X F is 70 N/mm or more.

Assignees

• Mazda Motor

Inventors

• Sawai Ryo

Classifications

• B60N2/7094

  Upholstery springs · CPC title

• B60N2/50 Primary

  Seat suspension devices · CPC title

• B60N2/90

  Details or parts not otherwise provided for · CPC title

• B60N2/509

  Seat guided by slides or the like · CPC title

• B60N2/54

  using mechanical springs · CPC title