Vehicle seat including a cloth spring member

1. A vehicle seat, comprising:

a pair of frame members, the frame members forming a frame of at least one of a seat cushion and a seat back and being disposed at positions surrounding a seat region with an interval between the frame members;

a cloth spring member bridged between the frame members along a bridging direction to cover the seat region;

a first wire that attaches the cloth spring member to a first frame member of the pair of frame members; and

a pair of second wires that attaches the cloth spring member to a second frame member of the pair of frame members, wherein:

the cloth spring member has a shorter length in the bridging direction at least on one end of the cloth spring member in a seat-width direction of the vehicle seat than at a center portion of the cloth spring member in the seat-width direction,

the cloth spring member has elasticity, and

each of the second wires include an insertion portion inserted into the cloth spring member that is inclined downward in a seat up-down direction from respective ends of the cloth spring member in the seat-width direction to the center portion of the cloth spring member.

2. The vehicle seat according to claim 1 , wherein:

the frame members include a pair of cushion front-rear frames extending in the seat-width direction with an interval therebetween in a seat front-rear direction at positions surrounding the seat region; and

the length in the seat front-rear direction of the cloth spring member bridged between the cushion front-rear frames decreases toward an outer side in the seat-width direction from a center portion of the cloth spring member in the seat-width direction.

3. The vehicle seat according to claim 2 , wherein a density of warp yarns of an elastic fiber forming the cloth spring member is higher at the center portion and both end portions of the cloth spring member in the seat-width direction than between the center portion and both the end portions of the cloth spring member in the seat-width direction and is low between the center portion and both the end portions of the cloth spring member in the seat-width direction.

4. The vehicle seat according to claim 1 , further comprising:

an attachment member that causes the first wire to be attached to the frame member, wherein:

an annular portion is formed in the cloth spring member by folding and sewing an end edge of the cloth spring member along the frame member; and

the first wire is inserted into the annular portion to support the end edge of the cloth spring member.

5. The vehicle seat according to claim 1 , wherein:

the frame members include up-down back frames extending in the seat-width direction with an interval therebetween in the seat up-down direction at positions surrounding a back region; and

the length in the seat up-down direction of the cloth spring member bridged between the up-down back frames decreases toward an outer side in the seat-width direction from the center portion of the cloth spring member in the seat-width direction.

6. The vehicle seat according to claim 1 , wherein:

the frame members include back side frames extending in the seat up-down direction with an interval therebetween in the seat-width direction at positions surrounding a back region; and

the length in a seat-width direction of the cloth spring member bridged between the back side frames increases toward a seat upper side from a seat lower side in the seat up-down direction.

7. The vehicle seat according to claim 1 , wherein:

the frame members include a pair of cushion side frames extending in a seat front-rear direction with an interval therebetween in the seat-width direction at positions surrounding the seating region; and

the length in the seat-width direction of the cloth spring member bridged between the cushion side frames increases toward a seat front side from a seat rear side in the seat front-rear direction.

8. The vehicle seat according to claim 7 , further comprising:

an attachment member that causes the first wire to be attached to the frame member, wherein:

an annular portion is formed in the cloth spring member by folding and sewing an end edge of the cloth spring member along the frame member; and

the first wire is inserted into the annular portion to support the end edge of the cloth spring member.

9. The vehicle seat according to claim 7 , wherein a portion of the cloth spring member, which has a lower height in the seat up-down direction than both ends of the cloth spring member in the seat-width direction, is formed at least on a seat rear side of the cloth spring member.

10. A vehicle seat, comprising:

a pair of frame members, the frame members forming a frame of at least one of a seat cushion and a seat back and being disposed at positions surrounding a seat region with an interval between the frame members;

a cloth spring member bridged between the frame members along a bridging direction to cover the seat region;

the cloth spring member has a shorter length in the bridging direction at least on one end of the cloth spring member in a seat-width direction of the vehicle seat than at a center portion of the cloth spring member in the seat-width direction, the cloth spring member has elasticity,

the frame members include a pair of cushion front-rear frames extending in the seat-width direction with an interval therebetween in a seat front-rear direction at positions surrounding the seating region,

the length in the seat front-rear direction of the cloth spring member bridged between the cushion front-rear frames decreases toward an outer side in the seat-width direction from a center portion of the cloth spring member in the seat-width direction, and

wherein a portion of the cloth spring member, which has a lower height in a seat up-down direction than both ends of the cloth spring member in the seat-width direction, is formed at least on a seat rear side of the cloth spring member.