JP2015098294A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat capable of obtaining favorable seating performance thereof by changing a sinking characteristic in a thickness direction even when thinning a seat pad.SOLUTION: A seat 10 comprises a seat pad 14 receiving the seating load of a seating person, and a seat frame 16 arranged on the bottom face of the seat pad 14. The resinous bellows-shaped spring members 20 having a spring action to a seating load-acting direction received by the seat pad 14 are protrudingly arranged on the seat frame 16 from the bottom face of the seat pad 14 to the upper side. Further, the complement members 22 are arranged at the tips of the spring members 20 to compress the seat pad 14 which is formed wider than the spring member 20 in view of a seat width direction and is arranged between a support and the seat frame 16 accompanying the compression spring deformation of the spring member 20.

Description

  The present invention relates to a vehicle seat. For example, the present invention relates to a vehicle seat including a seat pad that receives a seating load of a seated person, such as a seat cushion of an automobile seat, and a support such as a resin seat frame disposed on the bottom surface of the seat pad.

In a hybrid vehicle, a battery having a relatively large volume is often disposed at a lower position of a rear seat. On the other hand, the roof shape of automobiles tends to be lowered in order to reduce the air resistance. For this reason, the space of the rear seat location is limited, and the rear seat seat installed in the space is also made as thin as possible to ensure the occupant's living space.
By the way, the rear seat is generally composed of a seat cushion serving as a seat for a seated person and a seat back serving as a backrest. Of these, it is the seat cushion that affects the securing of the living space in the height direction. The seat cushion includes a seat pad such as a urethane pad that receives a seating load of a seated person, and a support body such as a resin-made plate-like seat frame disposed on the bottom surface of the seat pad. And from the standpoint of ensuring cushion performance, the thickness of the seat pad is usually kept thick, but the thickness of the seat pad is made as thin as possible within the allowable range for performance to secure a living space. .

Japanese Patent Laid-Open No. 9-182463

However, reducing the thickness of the seat pad affects the seat cushion seating performance, so maintaining and improving seating performance while reducing the seat pad thickness is particularly important in recent hybrid vehicles. The sheet is desired. This requirement is widely desired not only for hybrid vehicles but also for vehicle seats.
By the way, it is generally considered that the good seating performance is that the seat cushion sinks softly at the beginning, but it becomes harder as the seat is depressed.
As a measure to achieve a thin seat cushion while achieving such good seating performance, the upper pad of the seat pad is a soft pad and the lower pad is a hard pad. Conceivable. However, it is difficult to form such a pad by integral foam molding. That is, in this case, first, after foaming the upper layer side pad, the lower layer side foaming liquid is injected to cause foaming. It is difficult to foam and control the hardness of the upper layer and the lower layer as the foaming liquid on the lower layer side penetrates into the substrate.

  Therefore, the present invention has been made in view of the above points, and the problem to be solved by the present invention is that even when the seat pad is thinned, a spring member is arranged on the lower layer side of the seat pad. It is to obtain a good seating performance of the vehicle seat by providing and changing the sinking characteristics in the thickness direction.

In order to solve the above problems, the vehicle seat according to the present invention takes the following means.
The vehicle seat of the present invention is a vehicle seat comprising a seat pad that receives a seating load of a seated person and a support body that is disposed on the bottom surface of the seat pad, and the seat pad includes the seat pad. A resin spring member that has a spring action with respect to the seating load acting direction that the seat pad receives is provided protruding from the bottom surface of the seat pad so as to be embedded in a part of the thickness width of the seat pad. And a seat pad that is formed wider than the spring member as viewed in the width direction of the sheet and disposed between the support member and the tip of the spring member that is provided protruding from the support member. A supplementary member that compresses the spring member as the spring member is deformed is provided.
In addition, the support body in the present invention described above is formed of a resin frame, the spring member is also formed of a resin and has an accordion shape, and both are integrally attached. The supplementary member is also preferably made of resin.

According to the present invention described above, even when the seat is configured to be thin, the sinking characteristic when the seated person sits on the seat is relative to the characteristic of only the upper seat pad where the spring member does not function initially. It sinks with a soft sinking characteristic. In further subsidence after the subsidence action of the upper layer seat pad, the spring action of the spring member functions together with the lower layer seat pad so that it sinks with a relatively hard subsidence characteristic. In particular, in a state in which the spring action of the spring member functions in this sinking action, a part of the seat pad is forcibly compressed by the supplementary member disposed at the tip of the spring member as the spring spring is deformed. Therefore, it becomes harder sinking characteristics in combination with the compressive deformation action of the seat pad. Therefore, even if the seat is thinned, it is possible to obtain a favorable seating performance that is initially soft in the sinking characteristic at the time of sitting but becomes hard immediately thereafter.
When the support body is made of a resin frame and the spring member is also made of resin, the support body and the spring member can be integrally formed, facilitating manufacturing and reducing the cost.

  Even when the seat pad is thinned, the present invention of the above-described means can provide a good seating performance of the vehicle seat by disposing the spring member on the lower layer side of the seat pad to change the sinking characteristics in the thickness direction. Can be obtained.

It is a perspective view which decomposes | disassembles and shows the backseat sheet | seat of the motor vehicle of this embodiment. It is the perspective view which looked at the resin-made seat frame of FIG. 1 from the back surface side. It is sectional drawing of the left half of the backseat sheet | seat shown in FIG. FIG. 4 is an enlarged cross-sectional view in the vicinity of portion A showing a spring member portion in FIG. 3.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The vehicle seat of the present embodiment is a case of a rear seat mounted as a rear seat of an automobile. In addition, direction indications such as the front-rear direction, the up-down direction, and the left-right direction in this description indicate directions when viewed from a seated person seated on the seat.
The rear seat 10 of the present embodiment shown in FIG. 1 is a so-called bench seat having a long seat surface and is formed for a three-seater seat. The rear seat 10 includes a seat cushion 12, a seat back, and a headrest, but the illustration of the seat back and the headrest is omitted in FIG. The seat cushion 12 includes a seat pad 14 made of a urethane pad and a resin seat frame 16. This seat frame 16 corresponds to the support of the present invention.
The seat pad 14 is usually formed by foaming urethane resin. The seat pad 14 is formed in a shape that forms the outer shape of the seating surface of the seat cushion 12, and as shown in detail in FIG. 3, the outer surface is formed by being covered with a seat skin 18. The seat pad 14 is elastically deformed by the seating of the seated person on the seat cushion 12 and sinks and deforms to support the seated person. The seat skin 18 and the seat pad 14 of the urethane pad are integrally formed by foaming the urethane pad in a state where the sheet skin 18 is laid on the mold.

The seat frame 16 is made of resin. As shown in FIG. 3, the seat frame 16 is disposed on the bottom surface of the seat pad 14, and is disposed as a support that supports the seat pad 14 that receives the seating load of the seated person. As shown in FIG. 2 when the seat frame 16 is viewed from the back side, the seat frame 16 is formed in a box shape having an opening at the bottom. A frame-like leg portion 16 a forming a box shape is formed on the lower surface of the seat frame 16. The leg portion 16a includes a front leg portion 16af, a rear leg portion 16ar, a lateral leg portion 16as, and a connecting leg portion 16ab. The connecting leg portions 16ab are provided by connecting the front leg portion 16af and the rear leg portion 16ar, and two connecting leg portions 16ab are provided at positions that divide seats for three persons, so that the seat frame 16 is reinforced. Yes.
Note that the seat frame 16 shown in FIG. 2 is a case where the rear seat floor surface of the automobile on which the seat frame 16 is placed is a flat surface, and therefore the leg height of each leg portion 16a is shown as the same height. . However, in the case of the rear seat floor 28 of the automobile shown in FIG. 3, the central part of the passenger compartment has a tunnel shape and is higher, so that the connecting leg part is connected to the floor leg 16as from the side leg part 16as. 16ab is formed with low leg height. Accordingly, the leg heights of the front leg portion 16af and the rear leg portion 16ar are also set according to the floor height. As described above, the seat frame 16 shown in FIGS. 1 and 2 and the seat frame 16 shown in FIG. 3 are illustrated with different shapes of the leg portions 16a due to the difference in the shape of the floor surface, but other configurations are different. There is no.

As well shown in FIG. 1, a resin spring member 20 is disposed on the upper surface of the seat frame 16 corresponding to the seating positions on the left and right sides of the seat cushion 12. Two spring members 20 are provided for each of the left and right seats. The spring members 20 are provided at positions that support the buttocks of the seated person from both sides, that is, positions that support the seat bone of the seated person from below. Therefore, in this embodiment, the spring member 20 is not disposed at the central seating position.
The spring member 20 is made of resin and has a bellows shape. The bellows shape is formed as a form extending in the front-rear direction. In the case of this embodiment, the bellows-shaped spring member 20 and the seat frame 16 are integrally formed, and the bellows-shaped spring member 20 of the seat frame 16 is formed as shown in FIG. It is arranged as a form protruding from the upper surface toward the seat pad. For this reason, the outer peripheral surface of the bellows-shaped spring member 20 is embedded in the seat pad. The spring member 20 is disposed at a lower layer side position than the central position in the thickness width (height direction) of the seat pad 14 and is not disposed from the central position to the upper layer side position.

A supplementary member 22 is disposed on the top 20 a of the spring member 20. The supplementary member 22 includes a plate plate 22a and an attachment shaft portion 22b. The attachment shaft portion 22b is inserted into an engagement hole 24 formed in the top portion 20a of the spring member 20, and the supplementary member 22 is engaged with the spring member 20 for attachment. Two engagement holes 24 and two attachment shaft portions 22b are provided in the front-rear direction. The plate plate 22a is formed larger than the formation width of the bellows-shaped spring member in plan view, and as shown in FIG. 4, the plate plate 22a is disposed in a state of being embedded in the seat pad 14, The seat pad 14 interposed between the plate plate 22a and the seat frame 16 is compressed as the plate plate 22a moves downward.
1 and 2 are formed with punch holes 26 at positions corresponding to the respective seating positions. This is for weight reduction. In addition, the range X indicated by imaginary lines in the seat frame 16 in FIG. 1 is made of resin and the spring member 20 and the seat frame 16 are integrally formed in the present embodiment, so that the spring member is seated when the seated person is seated. A range in which the spring effect is exerted by bending and deforming when 20 performs a spring action is shown.

The operation of the embodiment having the above-described configuration will be described.
When the seated person is seated at the seating position corresponding to the position where the spring member 20 of the rear seat 10 is disposed, the seat pad 14 is pressed by the buttocks of the seated person and is compressed and deformed and sinks. In this case, the subsidence characteristic sinks with a relatively soft subsidence characteristic that is the characteristic of only the upper seat pad 14 where the spring member 20 does not function at first.
In further subduction after that, the spring action of the spring member 20 functions together with the lower seat pad 14 and sinks with a relatively hard subsidence characteristic. In this embodiment, in the case of the present embodiment, the bellows-shaped spring member 20 is disposed at a position that supports the seat bone of the seated person, so that the seat member's seat bone is supported from below by the spring member 20 as it sinks deeper. It is supported by the hard support properties in the finished state.
In particular, in a state where the spring action of the spring member 20 in this sinking action functions, the seat pad located below the plate board 22a by the plate board 22a of the supplementary member 22 disposed on the top 20a of the spring member 20 14 is forcibly compressed, adding to the hard support properties when sinking. Further, when the spring action of the spring member 20 functions, the portion indicated by the X range in the seat frame 16 of FIG. 1 is made of resin, so that the spring member 20 is bent and deformed by the load received by the spring member 20 to achieve the spring action. It functions effectively as a spring action in hard support properties.
Since the rear seat 10 of the present embodiment has a relatively hard sinking characteristic as it sinks as described above, the seat can be reduced in thickness while having a good seating characteristic, and can be used in a hybrid vehicle. It can be a sheet suitable for mounting.
In the present embodiment, since the seat frame 16 and the bellows-shaped spring member 20 are made of resin and integrally formed, it is possible to facilitate the manufacture and reduce the cost.

As mentioned above, although embodiment of this invention was described, this invention can be implemented with another various form.
For example, in the above-described embodiment, the present invention is applied to the rear seat of a hybrid vehicle. However, the present invention is not limited to a hybrid vehicle and can be widely applied to a vehicle seat such as an automobile.
In the above-described embodiment, the spring member 20 is formed in a resin bellows shape, but the shape and material of the spring member 20 are not particularly specified, and have a configuration having a spring action. I just need it.
In the above-described embodiment, the spring member 20 and the seat frame 16 are integrally formed. However, the spring member 20 and the seat frame 16 may be separately formed and assembled.
Further, in the above-described embodiment, the inside of the bellows shape constituting the spring member 20 is formed as a space. However, the space may be configured by filling the space with a pad material.

10 Rear seats (vehicle seats)
12 Seat cushion 14 Seat pad 16 Seat frame (support)
16a Leg part 18 Seat skin 20 Spring member 20a Top part 22 Supplementary member 22a Plate plate 22b Mounting shaft part 24 Engagement hole 26 Extraction hole

Claims (2)

A vehicle seat comprising: a seat pad that receives a seating load of a seated person; and a support disposed on a bottom surface of the seat pad,
A state in which a resin spring member having a spring action with respect to the seating load acting direction received by the seat pad is embedded in the support body in a range of a part of the thickness width of the seat pad from the bottom surface of the seat pad. Protruding and arranged,
A seat pad that is formed wider than the spring member as viewed in the width direction of the sheet and disposed between the support member and the front end portion of the spring member that is provided protruding from the support member A vehicle seat comprising a supplementary member that compresses as the spring member is compressed and deformed. The vehicle seat according to claim 1,
The support is formed of a resin frame, the spring member is also formed of a resin and has a bellows shape, and both are integrally attached, and the supplementary member is also formed of a resin. Vehicle seat characterized by being made.

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