JP2021046181A - Vehicular seat - Google Patents

Abstract

To provide a vehicular seat capable of improving ride comfort or reducing the number of components.SOLUTION: A vehicular seat includes: a seat cushion 10 that is equipped with a left side frame 11a and a right side frame 11b, a front side frame 12 and a rear side frame 13 coupling the left side frame and the right side frame, and a seating surface portion; and a seat back 20 rotatably coupled to the seat cushion. The seat surface portion is equipped with spring members 14a and 14b attached between the front side frame and the rear side frame, and a plurality of elastic band bodies 15 attached between the left side frame and the right side frame. Between the left side frame and the right side frame, and between the front side frame and the rear side frame, each of the plurality of elastic band bodies is fastened to the spring member, and upper surfaces of the plurality of elastic band bodies form a seating surface.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a vehicle seat, and is applicable to, for example, a vehicle seat having a seat surface that is not covered with a skin material.

The vehicle seat is composed of a seat back and a seat cushion. Further, the seat cushion is composed of a frame, a spring, a cushion body and a skin material. The frame consists of left and right frame sides and front and rear frames that connect the left and right frame sides. The spring is composed of a plurality of S springs whose ends are fixed to the front and rear frames. The cushion body is placed on the spring and is composed of urethane.

On the other hand, some chairs use a material having a relatively high hardness for the seat surface instead of urethane, which is a core material. For example, in Japanese Patent Application Laid-Open No. 2017-205466 (Patent Document 1), the seat surface main body is formed of a plate raised by bending a peripheral portion, and a plurality of narrow spaces are formed at the upper ends of a pair of rising surfaces facing each other. Place and fix a wide and thin ribbon-shaped metal plate to make it a seating surface, reduce the strength of the metal plate where body pressure is applied to make it easier to bend, and support the weight with more metal plates. Therefore, it has been proposed to use a seating surface to disperse body pressure.

JP-A-2017-205466

When the technology of Patent Document 1 is applied to a vehicle seat, each metal plate is shaken like a swing when the load changes back and forth during driving or getting on and off, and it becomes unstable due to acceleration / deceleration during running. The sitting comfort deteriorates. In addition, since each metal plate is fastened with rivets, screws, etc., the number of parts increases.
An object of the present disclosure is to provide a vehicle seat that improves ride quality or reduces the number of parts.
Other challenges and novel features will become apparent from the description and accompanying drawings herein.

The following is a brief overview of the representative ones of the present disclosure.
That is, the vehicle seat includes a seat cushion including a left side frame and a right side frame, a front frame and a rear frame connecting the left side frame and the right side frame, and a seat surface portion. A seat back, which is rotatably connected to the seat cushion, is provided. The seat surface portion includes a spring member attached between the front frame and the rear frame, and a plurality of elastic bands attached between the left side frame and the right side frame. Between the left side frame and the right side frame and between the front frame and the rear frame, each of the plurality of elastic bands is fastened to a spring member, and the upper surface of the plurality of elastic bands is seated. Form a surface.

According to the vehicle seat, the ride quality can be improved or the number of parts can be reduced.

FIG. 1 is a perspective view showing a vehicle seat in the embodiment. FIG. 2 is a view in which the elastic band is removed from the vehicle seat of FIG. FIG. 3A is a cross-sectional view taken along the line AA of FIG. 1, and FIGS. 3B and 3C are views for explaining an assembly procedure. FIG. 3 is a cross-sectional view taken along the line BB of FIG. FIG. 4 is a cross-sectional view taken along the line BB of FIG. FIG. 5 is a plan view showing the relationship between the elastic band and the spring member. FIG. 6 is a plan view of the seat surface portion for explaining the first method of adjusting the amount of deflection of the elastic band. FIG. 7 is a plan view of a seating surface portion for explaining a second method of adjusting the amount of deflection of the elastic band. FIG. 8A is a cross-sectional view of a hip point of a seat surface portion for explaining a third method for adjusting the amount of flexure of the elastic band, and FIG. 8B is a third method for adjusting the amount of flexure of the elastic band. It is sectional drawing of the front side of the seat surface portion explaining.

Hereinafter, embodiments will be described with reference to the drawings. However, in the following description, the same components may be designated by the same reference numerals and repeated description may be omitted. In addition, in order to clarify the explanation, the drawings may schematically represent the width, thickness, shape, etc. of each part as compared with the actual embodiment, but this is just an example, and the interpretation of the present invention is used. It is not limited.

(Vehicle seat)
The vehicle seat in the embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing a vehicle seat in the embodiment. FIG. 2 is a view in which the elastic band is removed from the vehicle seat of FIG.

The vehicle seat 1 shown here is, for example, one of a plurality of seats installed inside an automobile, which is a type of vehicle. In the following description, the vertical direction is defined as the vertical direction (UP, DW) with reference to the case where the vehicle on which the vehicle seat 1 is mounted is placed on a horizontal plane. Further, the front-rear direction (FR, RR) is defined to coincide with the front-rear direction of the vehicle, and the left-right direction (width direction) is defined to coincide with the width direction of the vehicle. FR is the front side direction of the vehicle, and RR is the rear side direction of the vehicle. Further, the vehicle seat 1 will be referred to as a right side (RH) and a left side (LH) when viewed from the rear of the vehicle.

As shown in FIG. 1, the vehicle seat 1 includes a seat cushion 10, a seat back 20 rotatably supported by a reclining mechanism 40 at the rear end of the seat cushion 10, and a seat cushion 10. It is configured to include a slide mechanism 30 for adjusting the front-rear position, and forms a seating portion for an occupant. The slide mechanism 30 is fixed to the floor of the vehicle, and the vehicle seat 1 is supported.

As shown in FIGS. 1 and 2, the seat cushion 10 has a front frame 12 and a rear side connecting the left side frame 11a, the right side frame 11b, the left side frame 11a, and the right side frame 11b. The frame 13 is provided with spring members 14a and 14b provided between the front frame 12 and the rear frame 13, and a plurality of elastic strips 15. The spring members 14a and 14b and the plurality of elastic strips 15 form the seating surface portion 50 of the occupant. The spring members 14a and 14b extend in the front-rear direction, and each of the plurality of elastic strips 15 extends in the left-right direction. The spring members 14a and 14b are composed of, for example, an S spring which is an elastic wire or a combination of a plurality of linear elastic wires. The elastic band 15 is composed of, for example, a strip-shaped (ribbon-shaped) rubber member, a resin member having ribbon-shaped elastic properties, or the like. The resin member having elastic properties is, for example, polypropylene (PP), polyamide (PA), polycarbonate (PC), polyacetal (POM), or the like.

The seat back 20 includes a left side frame 21a, a right side frame 21b, an upper frame (not shown) connecting the left side frame 21a and the right side frame 21b, and the left side frame 21a and the right side. The spring members 24a and 24b provided between the side frame 21b and the side frame 21b, a cushion material (not shown), and a skin material (not shown) are provided to form a backrest portion for an occupant. The spring members 24a and 24b are composed of, for example, S springs.

The portion of the vehicle seat 1 that is not covered with the cushion material such as urethane and the skin material is covered with a resin cover or the like.

(Seat surface)
The seat surface portion 50 of the seat cushion 10 will be described with reference to FIGS. 3 to 5. FIG. 3A is a cross-sectional view taken along the line AA of FIG. 1, and FIGS. 3B and 3C are views for explaining an assembly procedure. FIG. 4 is a cross-sectional view taken along the line BB of FIG. FIG. 5 is a plan view showing the relationship between the elastic band and the spring member.

The seat surface portion is composed of a plurality of elastic strips 15 and spring members 14a and 14b provided below the elastic strips 15. As shown in FIGS. 4 and 5, four claw portions 15c for fitting with the spring members 14a and 14b are provided on the lower surface of each of the plurality of elastic strips 15. Macroscopically, each of the plurality of elastic strips 15 extends in the left-right direction, and the spring members 14a and 14b extend in the front-rear direction. Microscopically, at the location where the elastic band 15 and the spring members 14a and 14b are fitted, the extending direction of the elastic band 15 and the extending direction of the spring members 14a and 14b are substantially the same. The present invention is not limited to this, and each of the plurality of elastic strips 15 may be arranged so as to have a portion to be fitted with the spring members 14a and 14b. Further, the number of the claw portions 15c of the plurality of elastic strips 15 is not limited to four, and may be two or six.

As shown in FIG. 3B, the elastic band 15 is fastened to the side frames 11a, 11b by connecting the convex portions 15a, 15b at the tip of the elastic band 15 to the elongated holes 11c, 11d of the side frames 11a, 11b. Fasten through. The elongated holes 11c and 11d are long holes in the front-rear direction. For example, first, the convex portion 15b at the tip of the elastic band 15 is pushed into the elongated hole 11d of the right side frame 11b from the right side of the side frame 11b. Next, the convex portion 15b at the tip of the elastic band 15 is pushed into the elongated hole 11c of the left side frame 11a from the left side of the side frame 11a. As a result, the elastic band 15 is attached to the side frames 11a and 11b.

Next, as shown in FIG. 3C, the elastic band 15 is pushed from above, and as shown in FIG. 4, the recesses of the four claws 15c of the elastic band 15 are fitted and joined to the spring members 14a and 14b. ..
As shown in FIG. 3A, the heights of the spring members 14a and 14b are lower than the heights of the side frames 11a and 11b, and are lower than the height of the elastic band 15 arranged on the side frames 11a and 11b by h. As a result, by fastening the elastic band 15 to the spring members 14a and 14b, the elastic band 15 has a concave shape, and a seating surface 15d is formed on the upper surface of the elastic band 15.

As shown in FIG. 4, the spring members 14a and 14b are molded so that the vicinity of the hip point (HP) of the occupant 100 (the place where the maximum load is applied) is the lowest when viewed in the front-rear direction. The concave shape of 15 also becomes a receiving shape for the occupant by changing the depth accordingly.

Further, in order not to suppress the elongation of the spring members 14a and 14b by fastening the spring members 14a and 14b and the elastic band body 15, the bending of the elastic band body 15 near the bottom (HP) is reduced and the thigh is used. It is preferable to increase the deflection of the lower (TP) elastic band 15.

A method of adjusting the amount of deflection of the elastic band 15 will be described with reference to FIGS. 6 to 8. FIG. 6 is a plan view of the seat surface portion for explaining the first method of adjusting the amount of deflection of the elastic band. FIG. 7 is a plan view of a seating surface portion for explaining a second method of adjusting the amount of deflection of the elastic band. FIG. 8A is a cross-sectional view of a hip point of a seat surface portion for explaining a third method for adjusting the amount of flexure of the elastic band, and FIG. 8B is a third method for adjusting the amount of flexure of the elastic band. It is sectional drawing of the front side of the seat surface portion explaining.

In the first adjustment method, as shown in FIG. 6, a through hole 15e is provided in the elastic band body 15, and the number of through holes 15e of the elastic band body 15 near the bottom (HP) is set to the elasticity of the thigh (TP). The number is less than the number of through holes 15e of the band 15.

In the second adjustment method, as shown in FIG. 7, the width of the elastic band 15 is changed, and the width of the elastic band 15 near the hip (HP) is set from the width of the elastic band 15 under the thigh (TP). Also thicken.

In the third adjustment method, as shown in FIGS. 8A and 8B, the thickness between the spring members 14a and 14b in the elastic band 15 is changed, and the thickness of the elastic band 15 near the bottom (HP) is changed. t1) is made thicker than the thickness (t2) of the elastic band 15 under the thigh (TP). Here, in FIG. 8A, the overall thickness of the elastic band 15 is uniform and t1. The thickness of both ends of the elastic band 15 of FIG. 8 (b) is t1 as in FIG. 8 (a), and the thickness (t3) from the upper vicinity of the side frame to the horizontal portion is gradually reduced. The thickness at the horizontal portion is t2. That is, t2 <t3 <t1.
The amount of deflection of the elastic band 15 may be adjusted by combining any two or all of the first adjusting method, the second adjusting method, and the third adjusting method.

In the embodiment, since the elastic bands 15 are fastened by the spring members 14a and 14b, the load can be easily distributed in the front-rear and left-right directions, so that the deterioration of the sitting comfort is suppressed. In addition, even when the load balance changes, the shape of the vehicle receives it from the occupant, so that the deterioration of sitting comfort is suppressed. Further, since a separate member is not required for fastening each component, the number of components can be reduced.

Although the invention made by the present inventor has been specifically described above based on the embodiment, it goes without saying that the present invention is not limited to the above embodiment and can be variously modified.

1 ... Vehicle seat 10 ... Seat cushion 11a ... Left side frame 11b ... Right side frame 12 ... Front frame 13 ... Rear frames 14a, 14b ... Spring member 15 ... Elastic band 20 ... Seat back

Claims (11)

A seat cushion including a left side frame and a right side frame, a front frame and a rear frame connecting the left side frame and the right side frame, and a seat surface portion.
A seat back that is rotatably connected to the seat cushion,
With
The seating surface is
A spring member attached between the front frame and the rear frame,
A plurality of elastic bands attached between the left side frame and the right side frame,
With
Between the left side frame and the right side frame and between the front frame and the rear frame, each of the plurality of elastic strips is fastened to the spring member.
The upper surface of the plurality of elastic bands is a vehicle seat forming a seating surface. In the vehicle seat of claim 1,
The elastic band is
A tip portion that engages by being inserted into a hole provided in the left side frame and the right side frame,
A claw portion having a recess for fitting with the spring member,
Vehicle seats with. In the vehicle seat of claim 2,
A vehicle seat in which the upper surface of the spring member is lower than the upper surface of the side frame. In the vehicle seat of claim 3,
A vehicle seat configured such that the height of the upper surface of the elastic band above the spring member is lower than the height of the upper surface of the elastic band above the side frame. In the vehicle seat of claim 2,
The elastic band extends in the direction in which the front frame or the rear frame extends.
The spring member is a vehicle seat extending in the direction in which the left frame or the right frame extends. In the vehicle seat of claim 2,
A vehicle seat configured such that the elastic band near the hip point of an occupant has a smaller deflection than the other elastic band. In the vehicle seat of claim 6,
A vehicle seat configured such that the flat area of the elastic band near the occupant's hip point is larger than the flat area of the other elastic band. In the vehicle seat of claim 6,
A vehicle seat configured such that the width of the elastic band near the hip point of the occupant is larger than the width of the other elastic band. In the vehicle seat of claim 6,
A vehicle seat configured such that the number of holes in the elastic band near the occupant's hip point is smaller than the number of holes in the other elastic band. In the vehicle seat of claim 6,
A vehicle seat configured such that the thickness of the elastic band near the hip point of an occupant is larger than the thickness of other elastic bands. In any one of the vehicle seats of claims 1 to 10,
The elastic band is a ribbon-shaped rubber member, and the spring member is an S spring, which is a vehicle seat.

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