seat cushion

Abstract

Suppresses the roll of the seated person. [Solution] As support members for elastically supporting a seated occupant, a first support member is arranged in the center of the seat width direction, and second support members 12, 13 are arranged on one and the other end sides of the seat width direction. The repulsive force of the second support members 12, 13 is greater than the repulsive force of the first support member 11. As a result, the seat cushion 3 can prevent the seated occupant from rolling significantly when the entire vehicle rolls. Furthermore, if the seated occupant is, for example, a vehicle driver, adverse effects on vehicle operation can be reduced.

Description

[Technical Field]

[0001] The present disclosure relates to a seat cushion applied to a vehicle seat. [Background technology]

[0002] For example, the seat cushion described in Patent Document 1 includes restraining portions that make it difficult for support members arranged on the left and right end sides of the seat cushion to sink. In other words, the seat cushion of Patent Document 1 is such that "after a person sits down, the upper surface of the second support member tends to face inward in the left-right direction, which reduces the pressure around the ischial bones relatively, and the occupant can be supported in a balanced manner around the ischial bones, buttocks, and thighs as a whole, thereby reducing fatigue." [Prior art documents] [Patent documents]

[0003] [Patent Document 1] WO2018 / 025796 publication Summary of the Invention [Problem to be solved by the invention]

[0004] When a vehicle such as a car changes direction, the entire vehicle rolls, causing a person seated in the vehicle seat (hereinafter referred to as the "occupant") to roll as well. Note that "roll" refers to a rotation or swinging motion around an imaginary axis of rotation extending in the direction of travel.

[0005] In particular, if the seat occupant is a driver of the vehicle, a large roll of the seat occupant may adversely affect the operation of the vehicle. The present disclosure discloses an example of a seat cushion that takes this into consideration. [Means for solving the problem]

[0006] It is desirable that a seat cushion applied to a vehicle seat has at least one of the following constituent features, for example. That is, the constituent elements are a first support member (11) that is arranged in the center of the seat width direction and is elastically deformable to support an occupant, and second support members (12, 13) that are arranged at one end and the other end of the seat width direction and are elastically deformable to support an occupant, the second support members (12, 13) generating a greater reaction force than the first support member (11).

[0007] As a result, the seat cushion can prevent the seated occupant from rolling significantly when the entire vehicle rolls, and in the case where the seated occupant is, for example, a vehicle driver, can prevent adverse effects on vehicle operation.

[0008] The seat cushion may have the following configuration, for example. That is, each of the first support member (11) and the second support member (12, 13) has a pad made of a foam material, and further, it is desirable that the pad (7) of the second support member (12, 13) has a greater hardness than the pad (7) of the first support member (11).

[0009] Furthermore, each of the first support member (11) and the second support member (12, 13) has a spring, and further, it is desirable that the spring (9) of the second support member (12, 13) has a larger elastic modulus than the spring (9) of the first support member (11).

[0010] Incidentally, the symbols in each of the parentheses above are examples showing the correspondence with the specific configurations, etc. described in the embodiments described below, and the present disclosure is not limited to the specific configurations, etc. shown by the symbols in the parentheses above. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram showing a vehicle seat according to a first embodiment. [Figure 2] FIG. 2 is a conceptual diagram showing the structure of a seat cushion. DETAILED DESCRIPTION OF THE INVENTION

[0012] The following "embodiments of the invention" are examples of embodiments that fall within the technical scope of the present disclosure. In other words, the invention-specific matters described in the claims are not limited to the specific configurations and structures shown in the following embodiments.

[0013] In this embodiment, a seat cushion according to the present disclosure is applied to a driver's seat (hereinafter referred to as a vehicle seat) installed in a vehicle such as a car. Arrows and diagonal lines indicating directions in each drawing are provided to facilitate understanding of the relationships between the drawings and the shapes of components or parts.

[0014] Therefore, the seat cushion is not limited to the directions shown in the drawings. The directions shown in the drawings are directions when the vehicle seat according to the present embodiment is assembled to a vehicle. Diagonally shaded drawings do not always represent cross-sectional views.

[0015] At least one of each member or portion described with a reference numeral is provided unless otherwise specified, such as "one." In other words, unless otherwise specified, two or more members may be provided. The seat cushion disclosed in this disclosure includes at least one of the components, such as the members or portions, described with a reference numeral and the structural portions shown in the drawings.

[0016] (First embodiment) <1. Overview of vehicle seats> As shown in Fig. 1, the vehicle seat 1 includes at least a seat cushion 3 and a seat back 5. The seat cushion 3 is a portion for supporting the buttocks of a seated occupant. The seat back 5 is a portion for supporting the back of the seated occupant.

[0017] <2. Seat cushion configuration> <2.1 Seat cushion overview> 2, the seat cushion 3 includes a cushion pad 7, at least one spring 9 (in this embodiment, a plurality of springs), and a cushion frame (not shown). The cushion frame forms the skeleton of the seat cushion 3.

[0018] The cushion pad 7 and the spring 9 are examples of support members that are attached to the cushion frame and elastically support a seated person. Specifically, the cushion pad 7 is made of a foam material such as urethane foam, and is an elastically deformable support member.

[0019] The spring 9 is a support member that is made of a metal wire or the like that is shaped like a wave, and is elastically deformable. The cushion pad 7 and the spring 9 work together to elastically support the seated person. In the following description, the support member 10 is a general term for the cushion pad 7 and the spring 9.

[0020] 2.2 Structure of the support member The support member 10 is configured to include at least 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 to support the seated occupant. The second support members 12 and 13 are disposed at one and the other ends of the seat width direction to support the seated occupant.

[0021] The second support members 12 and 13 are configured to generate a larger reaction force than the first support member 11. Specifically, the cushion pads 7 of the second support members 12 and 13 have a higher hardness than the cushion pad 7 of the first support member 11.

[0022] Furthermore, in this embodiment, the elastic modulus of the springs 9 of the second support members 12 and 13 is greater than the elastic modulus of the springs 9 of the first support member 11. Incidentally, in this embodiment, urethane chips, resin plates, or the like are embedded in the cushion pad 7 to adjust the hardness of the cushion pad 7.

[0023] 3. Features of the seat cushion according to this embodiment In the seat cushion 3 according to this embodiment, the repulsive force of the second support members 12, 13 is greater than the repulsive force of the first support member 11, so a greater repulsive force acts on the left and right ends of the seated person's buttocks than on the central portion.

[0024] This can prevent the seated occupant from rolling significantly when the entire vehicle rolls, with the seat cushion 3. Furthermore, for example, if the seated occupant is a vehicle driver, adverse effects on vehicle operation can be reduced.

[0025] (Other embodiments) In the above-described embodiment, the hardness of the cushion pad 7 and the elastic modulus of the spring 9 are different between the first support member 11 and the second support members 12 and 13, thereby causing the repulsive forces of the first support member 11 and the second support members 12 and 13 to be different. However, the present disclosure is not limited to this.

[0026] In other words, the disclosure may be configured such that the repulsive forces of the first support member 11 and the second support members 12 and 13 are different, for example, because the hardness of the cushion pad 7 or the elastic coefficient of the spring 9 is different between the first support member 11 and the second support members 12 and 13.

[0027] In the above-described embodiment, the support member 10 is configured by the cushion pad 7 and the spring 9. However, the present disclosure is not limited to this. That is, in the present disclosure, for example, the support member 10 may be configured by the cushion pad 7 or the spring 9.

[0028] In the above-described embodiment, the vehicle seat according to the present disclosure is applied to a vehicle. However, the application of the invention disclosed in this specification is not limited thereto. That is, the present disclosure can also be applied to seats used in vehicles such as railway cars, ships, and aircraft, as well as stationary seats used in theaters, homes, etc.

[0029] Furthermore, the present disclosure is not limited to the above-described embodiments as long as it conforms to the spirit of the disclosure described in the above-described embodiments. Therefore, the present disclosure may be a configuration in which at least two of the above-described embodiments are combined, or a configuration in which any of the components illustrated or described with reference numerals in the above-described embodiments is eliminated. [Explanation of symbols]

[0030] 1... Vehicle seat 2…<2. 3. Seat cushion 5... Seat back 7... Cushion pad 9... Spring 10... Support member 11... First support member 12... Second support member

Claims

1. In a seat cushion applied to a vehicle seat, a first support member that is elastically deformable and disposed at a center portion in a width direction of the seat to support a seated occupant; a second support member that is elastically deformable and that is arranged on one end side and the other end side of the seat width direction to support a seated occupant, and that generates a reaction force that is greater than that of the first support member; A seat cushion equipped with:

2. The first support member and the second support member each have a pad made of a foam material, The seat cushion according to claim 1 , wherein the pad of the second support member has a hardness greater than that of the pad of the first support member.

3. Each of the first support member and the second support member has a spring, 3. The seat cushion according to claim 1, wherein the spring of the second support member has a larger elastic modulus than the spring of the first support member.

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