Cushion body of vehicle seat

Abstract

To provide a cushion body of a vehicle seat which is laid and fixed on plural kinds of battery cases whose upper surface shapes are different.SOLUTION: A cushion pad 10 can be installed on a first battery case 4 or a second battery case 5 laid and fixed on a floor F. The cushion pad 10 does not interfere, when a shape of a first upper surface part 4a and a shape of a second upper surface part 5a are overlapped in a case that the first battery case 4 or the second battery case 5 is laid and fixed on the floor F, with any of the shape of the first upper surface part 4a and the shape of the second upper surface part 5a and has a shape of a rear face 10b which is laid through contacting with any part of the first upper surface part 4a and the second upper surface part 5a.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a cushion body for a vehicle seat. Specifically, it relates to a cushion body of a vehicle seat placed on a battery case installed on the floor.

Background Art

[0002] In an automobile seat, there is a type in which a cushion body of a seat cushion is placed and attached on a battery case placed and fixed on the floor. In the automobile seat described in Patent Document 1, the cushion body of the seat cushion of the rear seat, which is a bench seat, is placed and attached on a battery case placed and fixed on the floor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the rear seat described in Patent Document 1, when there are multiple types of battery cases with different upper surface shapes, it is necessary to prepare multiple types of cushion bodies of seat cushions in order to adapt the back surface shape of the cushion body of the seat cushion. As a result, there is a problem that the number of component types increases.

[0005] In view of such problems, an object of the present invention is to provide a cushion body for a vehicle seat that can be placed and fixed on multiple types of battery cases with different upper surface shapes.

Means for Solving the Problems

[0006] The first invention of the present invention is a cushion body of a vehicle seat that can be mounted on a plurality of types of battery cases placed and fixed on a floor, and when the upper surface shapes of the plurality of types of battery cases placed and fixed on the floor are overlapped, it does not interfere with any of the upper surface shapes and has a lower surface shape that abuts and is placed on a part of any of the upper surface shapes.

[0007] According to the first invention, the cushion body of the vehicle seat is such that when the lower surface shape overlaps the upper surface shapes of a plurality of types of battery cases placed and fixed on the floor, it does not interfere with any of the upper surface shapes and abuts and is placed on a part of any of the upper surface shapes. Thus, by providing only one type of cushion body for the vehicle seat, it can be mounted and fixed on the upper surfaces of a plurality of types of battery cases, so an increase in the number of component types can be suppressed.

[0008] The second invention of the present invention is, in the above first invention, wherein the cushion body has a first cushion body layer on the seating surface side and a second cushion body layer harder than the first cushion body layer disposed in a layer on the side opposite to the seating surface of the first cushion body layer, and at least the second cushion body layer abuts and is placed on the battery case.

[0009] According to the second invention, since the second cushion body layer harder than the first cushion body layer abuts and is supported on the upper surface of the battery case, even if there is some clearance between the upper surface of the battery case, it can suppress the seating surface of the first cushion body layer from being greatly recessed.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0011] FIGS. 1 to 6 show an embodiment of the present invention. This embodiment is an example in which the present invention is applied to a cushion pad 10 of a seat cushion 2 in an automotive rear seat 1. In each figure, the arrows indicate the respective directions when the automotive rear seat 1 is attached on the floor F of the automobile. In the following description, the description regarding the direction is made based on this direction. Here, the automotive rear seat 1 corresponds to the "vehicle seat" in the claims.

[0012] The cushion pad 10 of this embodiment is used for a seat cushion 2 which is a seating portion of an automotive rear seat 1 that is a three-seater bench seat, and has a left-right direction length substantially the same as the width of the passenger compartment. As shown in FIGS. 2 to 4, a seat back 3 which is a backrest portion is attached to the rear end side of the seat cushion 2, and the automotive rear seat 1 is constituted by the seat cushion 2 and the seat back 3. Here, the cushion pad 10 corresponds to the "cushion body" in the claims.

[0013] As shown in FIGS. 2 to 6, the seat cushion 2 is fixed in a state of being placed on a first battery case 4 or a second battery case 5 fixed on a floor F which constitutes a part of the body of the automobile. The first battery case 4 is a case that covers a nickel battery, and the second battery case 5 is a case that covers a lithium battery. A nickel battery or a lithium battery is mounted according to the vehicle type of the automobile. Here, the first battery case 4 and the second battery case 5 respectively correspond to the "battery case" in the claims.

[0014] The first battery case 4 and the second battery case 5 are substantially rectangular when viewed from above, and their front-rear length and left-right length are approximately the same. Also, the first battery case 4 and the second battery case 5 are substantially rectangular when viewed from the front. The shapes of the first upper surface portion 4a of the first battery case 4 and the second upper surface portion 5a of the second battery case 5 are different. Specifically, as shown well in FIG. 2, the first upper surface portion 4a is composed of a flat surface portion 4a1 whose cross-section extends substantially horizontally at the front side and an inclined surface portion 4a2 that extends downward and rearward at the rear side. The ratio of the front-rear dimension of the flat surface portion 4a1 to the inclined surface portion 4a2 is about 3:1. As shown in FIGS. 3 and 4, although there is a portion where the inclined surface portion 4a2 is formed in a stepped shape at the central portion in the left-right direction, there is no portion that protrudes above the inclined surface portion 4a2. As shown in FIGS. 2 to 4, the second upper surface portion 5a has a protruding surface portion 5a1 whose cross-section protrudes upward at the central portion in the front-rear direction, a front curved surface portion 5a2 that smoothly curves and extends downward and forward from the protruding surface portion 5a1 in the front, and a rear curved surface portion 5a3 that smoothly curves and extends downward and rearward from the protruding surface portion 5a1 in the rear. When the cross-section of the first upper surface portion 4a and the cross-section of the second upper surface portion 5a are overlapped, the vertical dimension difference between the flat surface portion 4a1 and the protruding surface portion 5a1 is at most about 15 mm, and the vertical dimension difference between the inclined surface portion 4a2 and the rear curved surface portion 5a3 is at most about 10 mm. Here, the first upper surface portion 4a and the second upper surface portion 5a respectively correspond to the "upper surface" in the claims.

[0015] The seat cushion 2 is formed by covering a cushion pad 10, which is a cushion material with a cushion frame (not shown) forming a skeleton, with a cushion cover 6, which is a skin material. The seat cushion 2 has a pair of left and right seat portions 2A and a central seat portion 2B disposed between the left and right seat portions 2A, and is formed in a bilaterally symmetric shape.

[0016] As shown in FIGS. 2 to 6, the cushion pad 10 has a surface 10a which is the upper surface on the side of the seated person, and a back surface 10b which is the lower surface on the side opposite to the seated person. The cushion pad 10 is formed by integrally connecting a first pad layer 11 which is a foam of polyurethane resin and a second pad layer 12 which is a bead foam of olefin resin. The first pad layer 11 is formed from a urethane foam obtained by foam-molding polyurethane resin, and its density is set to, for example, 0.045 ± 0.005 g / cm 3 or so. The first pad layer 11 has a surface portion 11a which is the surface on the seating surface side of the cushion pad 10, and a back surface portion 11b which is the surface on the side opposite to the seating surface. The surface portion 11a of the first pad layer 11 coincides with the surface 10a of the cushion pad 10. The back surface portion 11b of the first pad layer 11 constitutes a part of the back surface 10b of the cushion pad 10. The second pad layer 12 is a bead foam molded body of olefin resin such as polypropylene or polyethylene, and its density is set to 0.03 g / cm 3 or so. The second pad layer 12 is formed to have a lower density and a higher elastic modulus than the first pad layer 11. The second pad layer 12 has a surface portion 12a which is the surface on the seating surface side of the cushion pad 10, and a back surface portion 12b which is the surface on the side opposite to the seating surface. The surface portion 12a of the second pad layer 12 is a surface which abuts against and is connected to a part of the back surface portion 11b of the first pad layer 11. The back surface portion 12b of the second pad layer 12 constitutes a part of the back surface 10b of the cushion pad 10. The cushion pad 10 is obtained by disposing the pre-bead foam molded second pad layer 12 in a mold having a cavity in the shape of the cushion pad 10, injecting a foam raw material of polyurethane resin, and integrally foam-molding the first pad layer 11. Here, the back surface 10b corresponds to the "lower surface" in the claims. Also, the first pad layer 11 and the second pad layer 12 respectively correspond to the "first cushion body layer" and the "second cushion body layer" in the claims.

[0017] As shown in FIGS. 2 to 6, when the cushion pad 10 is placed on the first battery case 4 or the second battery case 5, the back surface 10b is formed in a shape that abuts against either the first upper surface portion 4a of the first battery case 4 or the second upper surface portion 5a of the second battery case 5 without interfering with either the first upper surface portion 4a or the second upper surface portion 5a. Specifically, as shown in FIGS. 2 to 4, the front end side portion of the back surface 10b of the cushion pad 10 is supported by two pipe members 7 fixed to the floor F and extending in the left-right direction. The frontward portion of the central portion in the front-rear direction of the back surface 10b of the cushion pad 10 abuts against and is supported by the protruding surface portion 5a1 of the second battery case 5, and is disposed at a maximum distance of about 15 mm upward from the flat surface portion 4a1 of the first battery case 4. The rearward portion of the central portion in the front-rear direction of the back surface 10b of the cushion pad 10 abuts against and is supported by the inclined surface portion 4a2 of the first battery case 4, and is disposed at a maximum distance of about 10 mm upward from the rear curved surface portion 5a3 of the second battery case 5. The rear end side portion of the back surface 10b of the cushion pad 10 is supported by a pipe member 8 fixed to the floor F and extending in the left-right direction and the floor F.

[0018] As shown in FIGS. 2 to 6, when the cushion pad 10 is placed on the first battery case 4, the rearward portion of the central portion in the front-rear direction of the back surface 10b of the cushion pad 10 abuts against and is supported by the inclined surface portion 4a2 of the first battery case 4. The forward portion of the central portion in the front-rear direction of the back surface 10b of the cushion pad 10 is arranged to be spaced upward by a maximum of about 15 mm from the flat surface portion 4a1 of the first battery case 4. However, since the dimension of the spacing is small and the second pad layer 12 having a high elastic modulus is located opposite thereto, the deformation of the cushion pad 10 in the vertical direction can be suppressed to a level without problems. When the cushion pad 10 is placed on the second battery case 5, the forward portion of the central portion in the front-rear direction of the back surface 10b of the cushion pad 10 abuts against and is supported by the protruding surface portion 5a1 of the second battery case 5. The rearward portion of the central portion in the front-rear direction of the back surface 10b of the cushion pad 10 is arranged to be spaced upward by a maximum of about 10 mm from the rear curved surface portion 5a3 of the second battery case 5. However, since the dimension of the spacing is small and the second pad layer 12 having a high elastic modulus is located opposite thereto, the deformation of the cushion pad 10 in the vertical direction can be suppressed to a level without problems.

[0019] The present embodiment configured as described above has the following effects. The shape of the back surface 10b of the cushion pad 10 is such that when it is brought close to face the first upper surface portion 4a of the first battery case 4 placed and fixed on the floor F or the second upper surface portion 5a of the second battery case 5 placed and fixed on the floor F, it does not interfere with either the first upper surface portion 4a or the second upper surface portion 5a, and is shaped to abut against and support either a part of the first upper surface portion 4a or a part of the second upper surface portion 5a. Thereby, by providing only one type of cushion pad 10, it can be placed and fixed on the first battery case 4 placed and fixed on the floor F or on the second battery case 5 placed and fixed on the floor F, so an increase in the types of parts can be suppressed.

[0020] Further, the cushion pad 10 has a first pad layer 11 on the seating surface side which is the upper side, and a second pad layer 12 which is harder than the first pad layer 11 on the side of the surface opposite to the seating surface which is the lower side. At least the back surface portion 12b of the second pad layer 12 abuts against and is placed on the first upper surface portion 4a or the second upper surface portion 5a. Thus, since the second pad layer 12 which is harder than the first pad layer 11 of the cushion pad 10 abuts against and is supported by the first upper surface portion 4a or the second upper surface portion 5a, even if there is some clearance between the back surface 10b and the first upper surface portion 4a or the second upper surface portion 5a, it is possible to suppress the surface 10a from being greatly recessed.

[0021] As described above, specific embodiments have been described. However, the present invention is not limited to their appearance and configuration, and various changes, additions, and deletions are possible without changing the gist of the present invention. For example, the following are examples.

[0022] 1. In the above embodiment, the present invention was applied to the cushion pad 10 of the rear seat 1 for an automobile which is a three-seater bench seat. However, regardless of this, it can also be applied to the cushion pad of a single-seater automobile seat.

[0023] 2. In the above embodiment, the second pad layer 12 was attached to the first pad layer 11 by integrally foaming during the foam molding of the first pad layer 11. However, it can also be attached by adhesion or the like.

[0024] 3. In the above embodiment, the present invention was applied to the seat of an automobile. However, it may also be applied to seats installed in airplanes, ships, trains, etc.

Explanation of reference numerals

[0025] 1 Rear seat for automobile (vehicle seat) 2 Seat cushion 4 First battery case (battery case) 4a First upper surface portion (upper surface) 4a1 Flat surface portion 4a2 Inclined surface portion 5 Second battery case (battery case) 5a Second upper face part (upper face) 5a1 Protruding face part 5a2 Front curved face part 5a3 Rear curved face part 10 Cushion pad (cushion body) 10a Surface 10b Back face (lower face) 11 First pad layer (first cushion body layer) 11a Surface part 11b Back face part 12 Second pad layer (second cushion body layer) 12a Surface part 12b Back face part F Floor

Claims

1. A cushion body for a vehicle seat that can be attached onto a plurality of types of battery cases that are placed and fixed on a floor, comprising: The cushion body for a vehicle seat has a lower surface shape that, when the upper surface shapes of the multiple types of battery cases are placed and fixed on the floor, and are superimposed, is placed in contact with a part of any of the upper surface shapes without interfering with any of the upper surface shapes.

2. In claim 1, The cushion body has a first cushion body layer on the seating surface side, and a second cushion body layer harder than the first cushion body layer, which is layered on the surface side of the first cushion body layer opposite the seating surface, A vehicle seat cushion in which at least the second cushion layer is placed in contact with the battery case.

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