Cushion

Abstract

The invention provides a cushion which is applied to a seat for a vehicle. A seat cushion according to the present disclosure is provided with: a first support member which is disposed in the center in the seat width direction, is elastically deformable, and supports a seated person; and a second support member that is disposed on a first end side and a second end side in the seat width direction, is elastically deformable, and supports the seated person, the second support member being configured so as to generate a reaction force greater than that of the first support member.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a seat cushion for a vehicle seat. BACKGROUND

[0002] A seat cushion described in WO2018 / 025796 is known. According to the invention in the publication, an effect of alleviating a sense of fatigue of a seated person can be exerted.

[0003] Specifically, the seat cushion of the publication has a support member for supporting a seated person, and extends in a front-rear direction of the seat cushion. The support member has a first support member provided on a central side in a left-right direction of the seat cushion, and a second support member provided on an outer side in the left-right direction than the first support member. Further, the seat cushion is provided with a restraint portion for making the left and right outer sides of the second support member less likely to sink.

[0004] According to the above-described seat cushion, when a seated person sits on the seat cushion, the upper surface of the second support member is easily made to be in a posture toward the inner side in the left-right direction due to the effect of the restraint portion. In this case, the pressure around the ischial bones of the seated person is relatively reduced. According to the above-described seat cushion, the entire region of the ischial bones, the hips, and the thighs of the seated person can be supported evenly. Thus, the sense of fatigue of the seated person can be alleviated. SUMMARY

[0005] In a vehicle or the like, a vehicle seat, the comfort, the sense of comfort, and the alleviation of the sense of fatigue of the seated person are important factors. Further, from the viewpoint of providing a better assistance for safe driving, the above factors are also very important.

[0006] Providing a better assistance for safe driving has been an important issue.

[0007] In a vehicle or the like, when turning in a traveling direction, the entire vehicle rolls, and thus a person seated on a vehicle seat (hereinafter referred to as a seated person) also rolls. The roll refers to a movement of rotating or swinging around a virtual rotation axis extending in the traveling direction.

[0008] In particular, when the seated person is a driver of the vehicle, a large roll of the seated person can have an adverse effect on the driving of the vehicle. In view of this point, the present disclosure discloses one example of a seat cushion.

[0009] A seat cushion applied to a vehicle seat preferably has at least one of, for example, the following configuration requirements.

[0010] The constituent elements include: a first support member disposed at the center in the width direction of the seat and capable of elastic deformation to support the seated person; and a second support member disposed at a first end side and a second end side in the width direction of the seat and capable of elastic deformation to support the seated person, the second support member being configured to generate a reaction force greater than that of the first support member.

[0011] In this seat cushion, when the vehicle rolls as a whole, the reaction force of the second support component can suppress excessive rolling of the occupant. When the occupant is, for example, the driver of the vehicle, it can suppress any adverse effects on driving.

[0012] The cushion may have the following components, for example.

[0013] Preferably, both the first support member and the second support member have a pad made of foam material. Furthermore, it is preferred that the hardness of the pad of the second support member is greater than that of the pad of the first support member.

[0014] Preferably, both the first support member and the second support member have springs. Furthermore, it is preferable that the spring constant of the second support member is greater than that of the spring of the first support member. Attached Figure Description

[0015] Figure 1 This is a diagram showing a seat in a vehicle.

[0016] Figure 2 This is a conceptual diagram showing the structure of the seat cushion. Detailed Implementation

[0017] Exemplary embodiments of this disclosure will now be described with reference to the accompanying drawings.

[0018] The following embodiments of the invention illustrate an example of an implementation within the scope of this disclosure. That is, the technical solutions described in the claims are not limited to the specific structures or configurations shown in the following embodiments.

[0019] This embodiment is an example of a seat installed in a vehicle or other means of transportation (hereinafter referred to as a vehicle seat). The arrows and diagonal lines in each figure are symbols used to indicate direction in order to facilitate understanding of the relationships between the figures and the shapes of the parts or components.

[0020] The seat cushion disclosed herein is not limited to the orientation shown in the figures. The orientation shown in the figures is the orientation in which the vehicle of this embodiment is assembled with the seat in the vehicle. The figures marked with slashes do not necessarily represent cross-sectional views.

[0021] For any component or part that is marked with a symbol, at least one such component is provided, unless otherwise stated beforehand as "only one". That is, unless otherwise stated beforehand as "only one", at least two such components are provided. The cushion disclosed herein includes at least one of the constituent elements such as components or parts marked with symbols, and the structural parts illustrated.

[0022] (First Embodiment)

[0023] <1. Overview of Vehicle Seats>

[0024] like Figure 1 As shown, the vehicle seat 1 includes a seat cushion 3 and a seat back 5. The seat cushion 3 is used to support the buttocks of the occupant. The seat back 5 is used to support the back of the occupant.

[0025] <2. Composition of the Seat Cushion>

[0026] <2.1 Overview of the Seat Cushion>

[0027] like Figure 2 As shown, the seat cushion 3 has a cushioning pad 7 and at least one (or multiple) springs 9 in this embodiment. The seat cushion 3 maintains its shape by a seat frame (not shown) that constitutes the skeleton of the seat cushion 3.

[0028] The cushioning pad 7 and spring 9 are examples of support components, which are mounted on the seat cushion frame and elastically support the seated person. Specifically, the cushioning pad 7 is made of a foamed material such as polyurethane foam and is capable of elastic deformation. The spring 9 is a component made of a wire or the like made of metal, which is shaped in a wave shape and is capable of elastic deformation.

[0029] The cushioning pad 7 and the spring 9 work together to provide elastic support for the seated person. In the following description, the support component 10 refers to the cushioning pad 7 and the spring 9 collectively.

[0030] <2.2 Composition of Support Components>

[0031] The support member 10 has a first support member 11 and second support members 12 and 13. The first support member 11 is disposed in the center of the seat width direction and supports the seated person. The second support members 12 and 13 are disposed on the first end side and the second end side of the seat width direction, respectively, and support the seated person.

[0032] The second support member is configured to generate a reaction force greater than that of the first support member 11. Specifically, the hardness of the buffer pad 7 of the second support members 12 and 13 is greater than that of the buffer pad 7 of the first support member 11.

[0033] The spring constant of the springs 9 in the second support components 12 and 13 is greater than that of the spring 9 in the first support component 11. Specifically, the hardness of the cushioning pad 7 is adjusted by embedding polyurethane sheets and / or resin boards, etc., in the cushioning pad 7.

[0034] <3. Features of the cushion in this embodiment>

[0035] In the seat cushion 3, since the reaction force of the second support members 12 and 13 is greater than the reaction force of the first support member 11, the reaction force applied to the left and right sides of the seater's buttocks is greater than the reaction force applied to the central part.

[0036] Therefore, this seat cushion 3 can suppress excessive rolling of the occupant when the vehicle rolls as a whole. Furthermore, when the occupant is, for example, the driver of the vehicle, it can suppress any adverse effects on driving.

[0037] (Other implementation methods)

[0038] In the above embodiments, the reaction forces of the first support member 11 and the second support members 12 and 13 are made different by making the hardness of the buffer pad 7 and the elastic coefficient of the spring 9 different for each of the first support member 11 and the second support members 12 and 13. However, this disclosure is not limited thereto.

[0039] For example, the reaction forces of the first support member 11 and the second support member 12 and 13 can be made different by making the hardness of the buffer pads 7 of the first support member 11 and the second support member 12 and 13 different, or by making the elastic coefficient of the springs 9 of the first support member 11 and the second support member 12 and 13 different.

[0040] In the above embodiment, the support member 10 is composed of a cushioning pad 7 and a spring 9. However, this disclosure is not limited to this. For example, the support member 10 may be composed of either the cushioning pad 7 or the spring 9.

[0041] In the above embodiments, examples of vehicle seats have been described. However, the scope of this specification is not limited thereto. That is, this disclosure can also be applied to seats used in vehicles such as railway vehicles, ships, and aircraft, as well as fixed seats used in theaters or homes.

[0042] Furthermore, this disclosure is not limited to the embodiments described above, as long as it conforms to the spirit of the invention. Therefore, it can be a structure composed of at least two of the above embodiments, or it can be a structure that eliminates any one of the constituent elements illustrated in the above embodiments, or it can be a structure that eliminates any one of the constituent elements indicated by the symbols in the above embodiments.

Claims

1. A seat cushion applied to a seat for a vehicle, characterized by comprising: a first support member disposed at a central portion in a seat width direction and capable of elastically deforming for supporting a seated person; and a second support member disposed at first and second end sides in the seat width direction and capable of elastically deforming for supporting the seated person, the second support member being configured to generate a reaction force greater than that of the first support member.

2. The seat cushion according to claim 1, characterized in that: the first support member and the second support member each have a cushion composed of a foamed material, and in addition, the hardness of the cushion of the second support member is greater than that of the cushion of the first support member.

3. The seat cushion according to claim 1 or claim 2, characterized in that: the first support member and the second support member each have a spring, and in addition, the spring constant of the spring of the second support member is greater than that of the spring of the first support member.

1. A seat cushion applied to a seat for a vehicle, characterized by comprising: a first support member disposed at a central portion in a seat width direction and capable of elastically deforming for supporting a seated person; and a second support member disposed at first and second end sides in the seat width direction and capable of elastically deforming for supporting the seated person, the second support member being configured to generate a reaction force greater than that of the first support member.

2. The seat cushion according to claim 1, characterized in that: the first support member and the second support member each have a cushion composed of a foamed material, and in addition, the hardness of the cushion of the second support member is greater than that of the cushion of the first support member.

3. The seat cushion according to claim 1 or claim 2, characterized in that: the first support member and the second support member each have a spring, and in addition, the spring constant of the spring of the second support member is greater than that of the spring of the first support member. ​ ​ ​

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