JP7366688B2 - vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat.

In the vehicle seat described in Patent Document 1, the frame of the seat cushion includes a pair of left and right side frames. The side frame has an upper frame disposed along the seat surface of the seat cushion, and a front frame and a rear frame that extend in the vertical direction and are inclined with respect to the seat surface. The upper frame, the front frame, and the rear frame are all formed of tubular materials. The reinforcing plate is fixed across the upper frame and the rear frame, and deformation of the corner between the upper frame and the rear frame is suppressed.

JP2002-283885A

In the vehicle seat described in Patent Document 1, a corner between an upper frame and a lower frame is reinforced with a reinforcing plate. The reinforcing plate is made of a plate material, and is typically formed by press working. However, molding of the plate material requires a mold, and manufacturing the mold is expensive.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a vehicle seat that can both strengthen the frame of the seat cushion and reduce costs.

A vehicle seat according to one aspect of the present invention includes a seat frame disposed along a seat surface of a seat cushion, a leg frame disposed at an angle with respect to the seat surface, the seat frame and the leg frame. and a reinforcing frame spanned between the reinforcing frame and the reinforcing frame, the reinforcing frame being formed of a frame material whose cross section perpendicular to the longitudinal direction is a closed cross section.

According to the present invention, it is possible to provide a vehicle seat that can both strengthen the frame of the seat cushion and reduce costs.

FIG. 1 is a perspective view showing an example of a vehicle seat for explaining an embodiment of the present invention. FIG. 2 is a perspective view of the seat cushion frame of the vehicle seat of FIG. 1; FIG. 3 is a perspective view from below of the seat cushion frame of FIG. 2; 3 is a perspective view of a reinforcing frame included in the seat cushion frame of FIG. 2. FIG.

FIG. 1 shows an example of a vehicle seat for explaining an embodiment of the present invention.

The vehicle seat 1 is a vehicle seat installed in a vehicle (vehicle) such as an automobile. The seat 1 is a bench seat on which a plurality of occupants can sit side by side, but it may also be a so-called captain's seat for one person. The seat 1 includes a seat cushion 2 that supports the buttocks and thighs of an occupant seated on the seat 1, and a seat back 3 that supports the waist and back of the occupant.

The seat cushion 2 has a seat cushion frame 10, and the seat cushion frame 10 is covered with a cushion pad (not shown) made of a foam material such as urethane foam. The seat cushion frame 10 and the cushion pad are covered with a trim cover (not shown) made of a skin material such as leather, woven fabric, or knitted fabric.

2 to 4 show the seat cushion frame 10. FIG.

The seat cushion frame 10 includes a seat frame 11 and a leg frame 12.

The seat frame 11 includes a front frame 20 disposed at the front of the seat cushion 2, a pair of side frames 21 disposed at the left and right sides of the seat cushion 2, and a back frame disposed at the rear of the seat cushion 2. The seat cushion 2 has a frame 22 and is arranged along the seat surface of the seat cushion 2.

The front frame 20, the pair of side frames 21, and the back frame 22 are all formed of a tube made of a metal material. The front frame 20 and the pair of side frames 21 are made of a single tube and are integrally formed by bending the tube. The back frame 22 is spanned between the pair of side frames 21 and is joined to each of the side frames 21. The joining method is, for example, welding, brazing, etc.

Here, the first end 22a of the back frame 22 joined to one side frame 21 is abutted against the side frame 21 in the axial direction of the first end 22a. The second end 22b of the back frame 22 joined to the other side frame 21 is flattened and placed on the side frame 21. Even if there is a molding error in the front frame 20 and the pair of side frames 21, which are made by bending a single tube, the flattened second end 22b may be bent over the side frame 21. 22b is appropriately shifted in the axial direction, molding errors are absorbed. Thereby, the back frame 22 is reliably joined to the pair of side frames 21 regardless of molding errors.

The seat frame 11 further includes a plurality of beam frames 23. The beam frame 23 spans between the front frame 20 and the back frame 22, and is joined to the front frame 20 and the back frame 22, respectively. The beam frame 23 is arranged directly below the occupant seated on the seat 1. The seat 1, which is a bench seat, has two seating areas A1 and A2 arranged in the width direction of the seat, and a pair of beam frames 23 are provided for each seating area A1 and A2.

The beam frame 23 is formed of a tube made of a metal material. The first end 23a of the beam frame 23 joined to the front frame 20 is abutted against the front frame 20 in the axial direction of the first end 23a. On the other hand, the second end 23b of the beam frame 23 joined to the back frame 22 is flattened and placed on the back frame 22. As a result, the beam frame 23 is reliably joined to the front frame 20 and the back frame 22, regardless of molding errors of the front frame 20, the pair of side frames 21, and the back frame 22. Note that the beam frame 23 is not limited to a tube material, and may be formed of a plate material.

The leg frame 12 includes a front leg frame 30 disposed at the front of the seat cushion 2 and a rear leg frame 31 disposed at the rear of the seat cushion 2. The front leg frame 30 and the rear leg frame 31 are provided for each seating area A1, A2 of the seat 1.

The front leg frame 30 includes a pair of leg sections 32 and a connecting section 33 that connects the pair of leg sections 32. The pair of leg portions 32 and the connecting portion 33 are made of a single tube, and are integrally formed into a substantially U-shape by bending the tube. Ends of each of the pair of legs 32 are joined to the front frame 20, and the pair of legs 32 extends downward from the front frame 20 and is arranged at an angle with respect to the seating surface of the seat cushion 2.

The rear leg frame 31 has a pair of leg parts 35 and a connecting part 36 connecting the pair of leg parts 35. The pair of leg portions 35 and the connecting portion 36 are made of a single tube, and are integrally formed into a substantially U-shape by bending the tube. Ends of each of the pair of leg portions 35 are joined to the back frame 22, and the pair of leg portions 35 extend downward from the back frame 22 and are arranged at an angle with respect to the seating surface of the seat cushion 2.

The connecting portion 33 of the front leg frame 30 is provided with a floor fixing portion 34 that is fixed to the vehicle floor. Further, a floor fixing portion 24 is also provided at the rear end portion of each of the pair of side frames 21 of the seat frame 11. These floor fixing parts 24, 34 are fixed to the vehicle floor by screws or the like, and the seat 1 is installed in the vehicle. Although the rear leg frame 31 is not provided with a floor fixing portion, similarly to the front leg frame 30, the connecting portion 36 of the rear leg frame 31 may also be provided with a floor fixing portion.

The seat cushion frame 10 further includes a reinforcing frame 13 spanned between the seat frame 11 and the leg frame 12. This reinforcing frame 13 is formed of a frame material whose cross section perpendicular to the longitudinal direction is a closed cross section, in other words, a tube material. The material of the tube material is a material that can be molded by plastic working, and is, for example, a metal material, but may also be a thermoplastic resin.

In this example, the reinforcing frame 13 is spanned between the beam frame 23 of the seat frame 11 and the leg portion 32 of the front leg frame 30. The beam frame 23 extends from the front frame 20 toward the rear of the seat along the seat surface of the seat cushion 2, while the leg portions 32 extend downward from the front frame 20 at an angle with respect to the seat surface of the seat cushion 2. It is extending. That is, the beam frame 23 and the leg portions 32 extend in mutually different directions.

The reinforcing frame 13 includes a seat-side joint 40 joined to the beam frame 23 (seat frame 11), a leg-side joint 41 joined to the leg 32 (leg frame 12), and a seat-side joint 40 and an intermediate portion 42 between the leg side joint portion 41. The seat side joint portion 40 is bent with respect to the intermediate portion 42 and extends along the beam frame 23. Further, the leg side joint portion 41 is bent with respect to the intermediate portion 42 and extends along the leg portion 32. That is, the seat side joint part 40 and the leg side joint part 41 extend in mutually different directions, similarly to the beam frame 23 and the leg part 32.

Further, the interval W1 between the pair of beam frames 23 included in one seating area A1 (or A2) of the seat 1 is smaller than the interval W2 between the pair of leg sections 32, and the beam frame 23 and the leg sections 32 are connected to the front frame. 20 are disposed offset in the longitudinal direction. Therefore, the seat side joint 40 and the leg side joint 41 are also arranged shifted in the longitudinal direction of the front frame 20, and the seat side joint 40, the leg side joint 41, and the intermediate part 42 are the same. It doesn't exist on a plane. That is, as shown in FIG. 4, the first plane S1 where the seat side joint part 40 and the intermediate part 42 are arranged, and the second plane S2 where the leg side joint part 41 and the intermediate part 42 are arranged. They are different from each other, and the reinforcing frame 13 is twisted.

The reinforcing frame 13 described above is formed by bending a tube material. A mold is not required for bending the tube material, and the tube material can be formed into various shapes based on combinations of bending angles, bending directions, and the like. Thereby, the reinforcing frame 13 having the seat side joint part 40 and the leg side joint part 41 extending in mutually different directions can also be easily formed at low cost. In particular, the twisted reinforcing frame 13 in which the first plane S1 where the seat side joint part 40 and the intermediate part 42 are arranged and the second plane S2 where the leg side joint part 41 and the intermediate part 42 are arranged are different from each other. can also be easily formed at low cost. From the viewpoint of bending, the cross-sectional shape of the tube material is preferably circular.

Furthermore, since the seat side joint portion 40 extends along the beam frame 23, the joint area between the reinforcing frame 13 and the beam frame 23 is expanded, and the joint strength between the two is increased. Further, since the leg-side joint portion 41 extends along the leg portion 32, the joint area between the reinforcing frame 13 and the leg portion 32 is expanded, and the joint strength between the two is increased.

Up to this point, the present invention has been described using the seat 1 mounted on a vehicle such as an automobile as an example, but the present invention is also applicable to seats for vehicles other than vehicles such as ships and aircraft.

As described above, the vehicle seat disclosed in this specification includes a seat frame disposed along the seat surface of the seat cushion, a leg frame disposed at an angle with respect to the seat surface, and a seat frame disposed along the seat surface of the seat cushion. The seat frame includes a reinforcing frame that spans between the seat frame and the leg frame, and the reinforcing frame is formed of a frame material whose cross section perpendicular to the longitudinal direction is a closed cross section.

Further, in the vehicle seat disclosed herein, the reinforcing frame includes a seat side joint portion joined to the seat frame, a leg side joint portion joined to the leg frame, and a seat side joint portion joined to the seat frame. an intermediate portion between the side joint portion and the leg side joint portion, the seat side joint portion being bent with respect to the intermediate portion and extending along the seat frame; The leg side joint portion is bent relative to the intermediate portion and extends along the leg frame.

Further, the vehicle seat disclosed in this specification has a first plane in which the seat side joint part and the intermediate part are arranged, and a second plane in which the leg side joint part and the intermediate part are arranged. , are different from each other.

1 Vehicle seat 2 Seat cushion 3 Seat back 10 Seat cushion frame 11 Seat frame 12 Leg frame 13 Reinforcement frame 20 Front frame 21 Side frame 22 Back frame 22a First end 22b Second end 23 Beam frame 23a First end Part 23b Second end 24 Floor fixing part 30 Front leg frame 31 Rear leg frame 32 Leg part 33 Connecting part 34 Floor fixing part 35 Leg part 36 Connecting part 40 Seat side joint part 41 Leg side joint part 42 Intermediate part S1 1st Plane S2 Second plane

Claims (3)

A seat frame arranged along the seat surface of the seat cushion;
a leg frame arranged at an angle with respect to the seat surface;
a reinforcing frame spanned between the seat frame and the leg frame;
Equipped with
The seat frame includes a front frame disposed at the front of the seat cushion, a back frame disposed at the rear of the seat cushion, and a plurality of frames spanned between the front frame and the back frame. having a beam frame;
One seating area is provided with a pair of beam frames,
The reinforcing frame is formed of a frame material whose cross section perpendicular to the longitudinal direction is a closed cross section,
The leg frame has a pair of legs and a connecting part connecting the pair of legs,
the connecting portion is fixed to a vehicle floor;
A vehicle seat, wherein the reinforcing frame is spanned between each of the pair of leg parts and each of the pair of beam frames . The vehicle seat according to claim 1,
The reinforcing frame is
a seat side joint portion joined to the beam frame ;
a leg side joint part joined to the leg part;
an intermediate portion between the seat side joint part and the leg side joint part;
has
The seat side joint part is bent with respect to the intermediate part and extends along the beam frame ,
The leg side joint part is bent with respect to the intermediate part and extends along the leg part ,
In the vehicle seat, the distance between the pair of beam frames is smaller than the distance between the pair of legs . The vehicle seat according to claim 2,
A first plane on which the seat side joint part and the intermediate part are arranged and a second plane on which the leg side joint part and the intermediate part are arranged are different from each other.

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