JP2021109474A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat which uses a resin skeleton material and can inhibit occurrence of failure in fixture of a drive unit.SOLUTION: In a vehicle seat, a drive unit 13 is fixed to a metallic bracket 15. The bracket 15 is a member to which an output part 11A of a recliner 11 is fixedly connected and which enables a driving force generated by the drive unit 13 to act on a first skeleton material 3. A creep phenomenon occurring in the metallic bracket 15 is so small that it can be ignored, compared to a creep phenomenon occurring in the first resin skeleton material 3. Thus, in the vehicle seat, a probability of occurrence of failure in fixation resulting from the creep phenomenon is very small.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to vehicle seats mounted on vehicles.

For example, in the vehicle seat described in Patent Document 1, a shell structure (shell structure) is used as a part of the skeleton material constituting the skeleton of the seat.

Japanese Unexamined Patent Publication No. 2017-19447

In many cases, the skeleton material of the shell structure is composed of a material (hereinafter, simply referred to as resin) containing a resin as a main component, such as "resin reinforced with carbon fibers". When a load is continuously applied to the resin, a phenomenon (hereinafter referred to as a creep phenomenon) occurs in which the deformation of the portion on which the load is applied increases with the passage of time.

Therefore, if the drive unit is directly fixed to the resin skeleton material, a creep phenomenon (aging) may occur in the skeleton material over time, and the drive unit may be improperly fixed.

In view of the above points, the present disclosure discloses an example of a vehicle seat that can suppress the occurrence of improper fixing of the drive unit in the vehicle seat using the resin skeleton material.

It is desirable that the vehicle seat mounted on the vehicle includes, for example, at least one of the following constituent requirements.

That is, the constituent requirements are a skeleton material (3) that constitutes a part of the seat skeleton, a skeleton material (3) made of a material containing a resin as a main component, and a drive unit that exerts a driving force (a driving force). 13) and a metal bracket (15) to which the skeleton member (3) is connected and the drive unit (13) is fixed.

As a result, it is possible to prevent the drive unit (13) from being improperly fixed in the vehicle seat. That is, the creep phenomenon that occurs in the metal bracket (15) is negligibly smaller than the creep phenomenon that occurs in the resin skeleton material (3). Therefore, in the vehicle seat, the probability of occurrence of fixing failure due to the creep phenomenon is extremely small.

The vehicle seat may have the following configuration, for example.

That is, the skeleton material (3) is displaceable, and has an output unit (11A) that transmits the driving force output from the drive unit (13) to the skeleton material (3) to displace the skeleton material (3). It is desirable that the transmission mechanism (11) is provided, and that the output unit (11A) is connected to the bracket (15) and a driving force is applied to the skeleton material (3) via the bracket (15).

The drive unit (13) is arranged on one side of the skeleton material (3), and the bracket (15) and the transmission mechanism (11) are arranged on the other side of the skeleton material (3). It is desirable that the material (3) is provided with a through hole (3C) into which a fixed portion (13C) between the drive unit (13) and the bracket (15) can be fitted.

The skeleton material (3) is a shell structure constituting the skeleton of the seat back, and the transmission mechanism is a recliner (11) for changing the inclination angle of the seat back, and the seat width direction of the skeleton material (3). The first side frame (7A) arranged on one end side and to which the recliner (11) is fixed, the first side frame (7A) extending in the front-rear direction of the seat, and the seat width direction of the skeleton material (3). A second side frame (7B) arranged on the other end side and extending in the front-rear direction of the seat is provided, and the drive unit (13) is arranged between the first side frame (7A) and the second side frame (7B). It is desirable that it is done.

The drive unit (13) and the bracket (15) are fixed by at least one bolt (B2), and the drive unit (13) is provided with a female screw hole or a nut for connecting to the threaded portion of the bolt (B2). The bracket (15) is provided with a through hole through which the lower part of the neck of the bolt (B2) penetrates, and the head of the bolt (B2) is opposite to the drive unit (13) with respect to the bracket (15). It is desirable to be located on the side.

Incidentally, the reference numerals in the parentheses are examples showing the correspondence with the specific configurations and the like described in the embodiments described later, and the present disclosure is not limited to the specific configurations and the like shown in the symbols in the parentheses. ..

It is a figure which shows the vehicle seat which concerns on 1st Embodiment. It is an exploded view of the fixed structure part of the drive unit which concerns on 1st Embodiment. It is a figure which shows the fixed structure part of the drive unit which concerns on 1st Embodiment. It is a figure which shows the fixing structure of the 1st skeleton material which concerns on 1st Embodiment and a bracket.

The following "embodiments of the invention" show an example of embodiments belonging to the technical scope of the present disclosure. That is, the matters specifying the invention described in the claims are not limited to the specific configuration, structure, etc. shown in the following embodiments.

This embodiment is an example in which the vehicle seat according to the present disclosure is applied to a seat mounted on a vehicle such as a vehicle (hereinafter, referred to as a vehicle seat). The arrows, diagonal lines, etc. indicating the directions attached to each figure are described in order to make it easier to understand the relationship between each figure and the shape of a member or a part.

Therefore, the vehicle seat is not limited to the direction attached to each drawing. The directions shown in each figure are the directions in the state where the vehicle seat according to the present embodiment is assembled to the vehicle. The shaded view does not necessarily indicate a cross section.

At least one member or part described with a reference numeral is provided unless otherwise specified such as "one". That is, if there is no notice such as "one", two or more of the members may be provided. The vehicle seats presented in the present disclosure include at least components such as members or parts described with reference numerals, as well as the illustrated structural parts.

(First Embodiment)
<1. Overview of vehicle seats>
As shown in FIG. 1, the vehicle seat 1 includes at least a first skeleton member 3, a second skeleton member 5, a frame structure 7, a reclining device 9, and the like. The first skeleton material 3 is a shell structure constituting the skeleton of the seat back. The seat back supports the back of the seated person.

The second skeleton material 5 is a shell structure that constitutes the skeleton of the seat cushion. The seat cushion supports the buttocks of the seated person. The first skeleton material 3 and the second skeleton material 5 are made of a material (hereinafter, simply referred to as resin) containing a resin as a main component, such as "resin reinforced with carbon fibers".

The frame structure 7 is a metal structure that supports the seat body. The seat body refers to a portion of the vehicle seat 1 including a seat cushion and a seat back. The frame structure 7 has at least a first side frame 7A, a second side frame 7B, and the like.

The first side frame 7A and the second side frame 7B are metal members extending in the front-rear direction of the seat. The first side frame 7A is arranged on one end side in the seat width direction. The second side frame 7B is arranged on the other end side in the seat width direction.

A second skeleton member 5 is arranged between the first side frame 7A and the second side frame 7B (hereinafter, referred to as the inner side). The second skeleton member 5 is fixed to the first side frame 7A and the second side frame 7B by a fixing structure using a plurality of bolts.

Each of the plurality of bolts penetrates the second skeleton member 5 and is fastened and fixed to each of the two side frames 7A and 7B in a state where the axial force (fastening force) generated in the bolt does not act on the second skeleton member 5. Has been done.

The seat body is fixed to the vehicle via two slide devices 10. The first slide device 10 is connected to the first side frame 7A to slidably support the seat body. The second slide device 10 is connected to the second side frame 7B to slidably support the seat body.

The reclining device 9 is a device for changing the inclination angle of the seat back (first skeleton material 3). That is, the first skeleton member 3 can be rotationally displaced with respect to the second skeleton member 5, the first side frame 7A, and the second side frame 7B with the lower end side as the center of rotation.

The reclining device 9 includes at least two recliners 11, one drive unit 13, one drive shaft 13A, and the like. The drive unit 13 exerts a driving force.

The drive unit 13 is arranged between the first side frame 7A and the second side frame 7B at a position close to the first side frame 7A. The two recliners 11 form a transmission mechanism for changing the inclination angle of the seat back by utilizing the above-mentioned driving force.

Of the two recliners 11, the first recliner 11 is fixed to the rear end side of the first side frame 7A, and the second recliner 11 is fixed to the rear end side of the second side frame 7B. The two recliners 11 have a symmetrical structure.

The drive shaft 13A extends in the seat width direction and transmits the driving force generated by the drive unit 13 to each of the two reclining lines 11. Then, each recliner 11 transmits the driving force output from the driving unit 13 to the first skeleton member 3.

Each recliner 11 has an output section 11A and a fixing section 11B, as shown in FIG. The output unit 11A outputs a force for displacing the first skeleton member 3. The fixing portion 11B is a portion fixed to the frame structure 7.

Specifically, the fixing portion 11B of the recliner 11 arranged on the first side frame 7A side is welded and fixed to the first side frame 7A. The fixed portion 11B of the recliner 11 arranged on the second side frame 7B side is welded and fixed to the second side frame 7B.

<2. Fixed structure of drive unit>
The drive unit 13 is fixed to a metal bracket 15 as shown in FIG. The first skeleton member 3 is connected and fixed to the bracket 15. The connection and fixing of the bracket 15 and the first skeleton member 3 is substantially the same as the fixing structure of the second skeleton member 5 and the first side frame 7A.

That is, as shown in FIG. 4, the first skeleton member 3 is provided with a through hole 3A through which the fixing bolt B1 can penetrate. A cylindrically formed metal collar 3B is fitted in the through hole 3A.

The fixing bolt B1 penetrates the collar 3B and reaches the bracket 15. A nut (weld nut in this embodiment) N1 is provided on the side of the bracket 15 opposite to the first skeleton member 3. The fixing bolt B1 is tightened to the nut N1.

Therefore, even if the fixing bolt B1 is tightened, the axial force generated in the fixing bolt B1 acts on the collar 3B and does not act on the first skeleton member 3. Then, the first skeleton member 3 is in a state of being positioned by the flat washer W1 and the bracket 15.

That is, the displacement of the first skeleton member 3 in the seat width direction is regulated by the flat washer W1 and the bracket 15. The displacement of the first skeleton member 3 in the direction orthogonal to the sheet width direction is regulated by the fixing bolt B1 penetrating the through hole 3A. As a result, the first skeleton member 3 is connected and fixed to the bracket 15.

Then, as shown in FIG. 3, the drive unit 13 is arranged on one side of the first skeleton member 3, that is, on the inner side (on the right side in FIG. 3). A bracket 15 and a recliner 11 are arranged on the other side (hereinafter, also referred to as the outer side) of the first skeleton member 3 with the first skeleton member 3 in between.

The output unit 11A of the recliner 11 is connected and fixed to the bracket 15. Therefore, the driving force output from the driving unit 13 is transmitted to the first skeleton member 3 via the bracket 15.

Therefore, when the drive unit 13 operates, the output unit 11A of the recliner 11 is rotationally displaced, and the first skeleton member 3 is rotationally displaced in the front-rear direction of the seat. In this embodiment, the bracket 15 is connected and fixed to the output unit 11A by welding.

As shown in FIG. 2, the drive unit 13 is fixed to the bracket 15 by at least one (two in this embodiment) bolt B2. The drive unit 13 is provided with a female screw hole or a nut (in this embodiment, the female screw hole 13B) that is connected to the threaded portion of the bolt B2.

The bracket 15 is provided with a through hole 15A through which the lower part of the neck of each bolt B2 penetrates. The head of the bolt B2 is located on the side opposite to the drive unit 13 with respect to the bracket 15, as shown in FIG. That is, the two bolts B2 are inserted into the through hole 15A from the outside (see FIG. 1).

As shown in FIG. 2, the first skeleton member 3 is provided with a through hole 3C into which the fixing portion 13C of the drive unit 13 and the bracket 15 can be fitted. The through hole 3C according to the present embodiment is composed of an elongated hole whose major axis direction coincides with the seat front-rear direction.

The fixed portion 13C according to the present embodiment is composed of a metal stay member to which the drive unit 13 is fixed. The female screw hole is formed in the stay member. The stay member is integrated with the drive unit 13 by one or a plurality of screws (not shown).

<3. Features of the vehicle seat according to this embodiment>
In the vehicle seat 1 according to the present embodiment, the drive unit 13 is fixed to the metal bracket 15. The bracket 15 is a member in which the output portion 11A of the recliner 11 is connected and fixed, and the driving force generated by the driving unit 13 is applied to the first skeleton member 3.

The creep phenomenon that occurs in the metal bracket 15 is so small that it can be ignored as compared with the creep phenomenon that occurs in the resin first skeleton material 3. Therefore, in the vehicle seat 1, the probability of occurrence of fixing defects due to the creep phenomenon is extremely small.

The first skeleton member 3 is provided with a through hole 3C into which the fixing portion 13C of the drive unit 13 and the bracket 15 can be fitted. As a result, the continuous load applied to the first skeleton material 3 is suppressed, so that the creep phenomenon can be reliably suppressed from occurring on the first skeleton material 3.

The drive unit 13 is arranged between the first side frame 7A and the second side frame 7B, that is, inside the vehicle seat 1. As a result, it is possible to prevent the widthwise dimension of the vehicle seat 1 from becoming large.

The heads of the plurality of bolts B2 for fixing the drive unit 13 to the bracket 15 are located on the opposite side of the bracket 15 from the drive unit 13. As a result, the operator (including the automatic assembling machine) when mounting the drive unit 13 on the bracket 15 can insert the bolt B2 from the outside, so that the deterioration of the assembling workability can be suppressed.

(Other embodiments)
The drive unit 13 according to the above-described embodiment exerts a driving force that displaces the first skeleton member 3. However, this disclosure is not limited to this. That is, the disclosure can be applied to, for example, a structure for fixing a drive unit that exerts a driving force that displaces the second skeleton member 5.

The bracket 15 according to the above-described embodiment was a member that exerts a force that displaces the first skeleton member 3 on the first skeleton member 3. However, this disclosure is not limited to this. That is, the disclosure may be, for example, a member in which the bracket 15 is fixed to the first side frame 7A.

In the above-described embodiment, the first skeleton member 3 is provided with a through hole 3C into which the fixed portion 13C can be fitted, and the drive unit 13 is arranged inside the first side frame 7A side. However, this disclosure is not limited to this.

In the above embodiment, the head of the bolt B2 that fixes the drive unit 13 to the bracket 15 is located on the opposite side of the bracket 15 from the drive unit 13. However, this disclosure is not limited to this.

In the above-described embodiment, the vehicle seat according to the present disclosure is applied to the vehicle. However, the application of the invention disclosed herein is not limited to this. That is, the disclosure can be applied to, for example, seats used for vehicles such as railroad vehicles, ships, and aircraft, and stationary seats used for theaters, homes, and the like.

Furthermore, the present disclosure is not limited to the above-described embodiment as long as it conforms to the purpose of the disclosure described in the above-described embodiment. Therefore, either the configuration in which at least two embodiments of the plurality of embodiments described above are combined, or the configuration requirements shown in the illustration or the configuration requirements described with reference numerals in the above-described embodiment are abolished. It may be a configured configuration.

1 ... Vehicle seat 3 ... 1st skeleton material 5 ... 2nd skeleton material 7 ... Frame structure 7A ... 1st side frame 7B ... 2nd side frame 9 ... Reclining device 10 ... Slide device 11 ... Recliner 11A ... Output unit 11B … Fixed part 13… Drive unit 13A… Drive shaft 13C… Fixed part 15… Bracket

Claims (5)

In the vehicle seat mounted on the vehicle
A skeleton material that forms part of the sheet skeleton and is made of a material whose main component is resin.
A drive unit that exerts driving force and
A vehicle seat comprising a metal bracket to which the skeleton material is connected and to which the drive unit is fixed. The skeleton material is displaceable and
A transmission mechanism having an output unit that transmits the driving force output from the driving unit to the skeleton material and displaces the skeleton material is provided.
The vehicle seat according to claim 1, wherein the output unit is connected to the bracket and causes the driving force to act on the skeleton material via the bracket. The drive unit is arranged on one side of the skeleton material.
The bracket and the transmission mechanism are arranged on the other side of the skeleton material.
The vehicle seat according to claim 2, wherein the skeleton material is provided with a through hole into which a fixed portion between the drive unit and the bracket can be fitted. The skeleton material is a shell structure constituting the skeleton of the seat back.
The transmission mechanism is a recliner for changing the inclination angle of the seat back.
A first side frame arranged on one end side in the seat width direction of the skeleton material and to which the recliner is fixed, and a first side frame extending in the front-rear direction of the seat.
A second side frame arranged on the other end side of the skeleton material in the seat width direction and extending in the front-rear direction of the seat is provided.
The vehicle seat according to claim 3, wherein the drive unit is arranged between the first side frame and the second side frame. The drive unit and the bracket are fixed by at least one bolt.
The drive unit is provided with a female screw hole or nut that connects to the threaded portion of the bolt.
The bracket is provided with a through hole through which the lower part of the neck of the bolt penetrates.
The vehicle seat according to claim 4, wherein the head of the bolt is located on the side opposite to the drive unit with respect to the bracket.

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