JP7442967B2 - center bracket - Google Patents

Description

The present disclosure relates to a center bracket for a vehicle seat mounted on a vehicle.

For example, in the center bracket described in Patent Document 1, the tower bracket is arranged between the first seat back and the second seat back. The tower bracket has a lower end fixed to the vehicle, and an upper end connected to the seat back via a first connection bracket and a second connection bracket.

The first connection bracket connects the first seat back and the tower bracket. The second connection bracket connects the second seat back and the tower bracket. The first connecting bracket and the second connecting bracket are brackets having a bilaterally symmetrical structure or the same structure (common parts).

Patent No. 4984679

In the invention described in Patent Document 1, there is a possibility that the energy due to the load acting on the seat back in the seat longitudinal direction cannot be absorbed.
In view of the above points, the present disclosure discloses an example of a center bracket for a vehicle seat that is capable of absorbing energy due to a load acting on the seat back in the seat longitudinal direction.

A vehicle seat comprising a seat back (3) having a first seat back (3A) and a second seat back (3B) disposed at a position apart from the first seat back (3A) in the seat width direction. It is desirable that the applied center bracket has at least one of the following configuration requirements, for example.

That is, the component is a tower bracket (10) for supporting the seat back (3), which is disposed between the first seat back (3A) and the second seat back (3B) and is attached to the vehicle. a first connecting bracket (11) that connects the upper end side of the tower bracket (10) and the first seat back (3A); This is a second connection bracket (12) that connects the second seat back (3B) and has a different rigidity from the first connection bracket (11).

As a result, in the vehicle seat, the load acting on the seat back in the seat longitudinal direction is input to the tower bracket (10) via the first connection bracket (11) and the second connection bracket (12).

At this time, since the rigidity of the first connecting bracket (11) and the rigidity of the second connecting bracket (12) are different, the timing at which force is input from the first connecting bracket (11) to the tower bracket (10) and the second connecting bracket (11) are different. The timing at which force is input from the connection bracket (12) to the tower bracket (10) is shifted.

Therefore, a twisting moment is induced in the tower bracket (10) that twists and deforms the tower bracket (10) from the connection bracket side with high rigidity to the side of the connection bracket with low rigidity.

Therefore, the tower bracket (10) undergoes plastic deformation while torsionally deforming when a load in the seat back and forth direction is applied to the seat back. In turn, the vehicle seat can effectively absorb energy due to the load.

Incidentally, in the vehicle seat described in Patent Document 1, since the first connection bracket and the second connection bracket have a bilaterally symmetrical structure or the same structure (common parts), the above-mentioned twisting moment does not occur in principle. For this reason, the tower bracket according to the vehicle seat described in Patent Document 1 is less likely to be plastically deformed than the tower bracket (10), and therefore it is difficult to effectively absorb the energy due to the above-mentioned load.

Note that the vehicle seat may have the following configuration.
That is, the dimensions related to the first connection bracket (11), extending along the first connection bracket (11) from the connection part with the tower bracket (10) to the connection part with the first seat back (3A). is the first circumferential dimension (L1), which is the dimension related to the second connection bracket (12), and is the dimension from the connection part with the tower bracket (10) along the second connection bracket (12) to the second seat back ( 3B) is the second circumferential dimension (L2), the first circumferential dimension (L1) and the second circumferential dimension (L2) are different, so that the first connecting bracket (11 ) is preferably different from the rigidity of the second connection bracket (12). This may enable those who provide vehicle seats to easily design and calculate a center bracket that can obtain the above effects.

Of the first connecting bracket (11) and the second connecting bracket (12), at least the connecting bracket (12) having the lower rigidity is provided with a curved portion (14) that is curved so as to be convex toward the rear side of the seat. It is desirable that the This may enable a person who provides a vehicle seat to easily vary the rigidity of the first connection bracket (11) and the second connection bracket (12).

Since the moment of inertia of the first connection bracket (11) and the moment of inertia of the second connection bracket (12) are different, the rigidity of the first connection bracket (11) and the rigidity of the second connection bracket (12) are different. It is also possible to have a different configuration. This may enable a person who provides a vehicle seat to easily vary the rigidity of the first connection bracket (11) and the second connection bracket (12).

A bead portion (10C) forming a reinforcing convex portion is provided in a plate-shaped portion of the tower bracket (10) that is substantially perpendicular to the seat width direction, and a bead portion (10C) forming a reinforcing convex portion is provided. It is desirable that the connection bracket (12) located on the bead portion (10C) side of the second connection bracket (12) has lower rigidity than the connection bracket (11) located on the opposite side to the bead portion (10C). As a result, the tower bracket (10) reliably undergoes plastic deformation while being twisted, so it may be possible to effectively absorb the energy due to the load.

Incidentally, the above-mentioned symbols in parentheses are an example showing the correspondence with the specific configurations described in the embodiments described later, and the present disclosure is not limited to the specific structures etc. shown in the above-mentioned parentheses. It's not something you can do.

FIG. 1 is a diagram showing a vehicle seat according to a first embodiment. It is a figure showing the center bracket concerning a 1st embodiment. It is a figure showing the tower bracket concerning a 1st embodiment. It is a figure showing the center bracket concerning a 1st embodiment. It is a figure showing the center bracket concerning other embodiments.

The following "Embodiments of the Invention" represents an example of an embodiment that falls within the technical scope of the present disclosure. In other words, the matters specifying the invention described in the claims are not limited to the specific configurations and structures shown in the embodiments below.

At least one member or portion is provided with at least a reference numeral, unless otherwise specified such as "one". That is, if there is no indication such as "one", two or more members may be provided. The invention disclosed in the present disclosure includes components such as at least the referenced and described members or parts.

This embodiment is an example in which a vehicle seat and a center bracket according to the present disclosure are applied to a seat mounted on a vehicle such as a vehicle (hereinafter referred to as a vehicle seat). Arrows indicating directions attached to each figure are provided to facilitate understanding of the relationship between the figures.

Therefore, the invention shown in this disclosure is not limited to the directions given in each figure. The directions shown in each figure are the directions when the vehicle seat according to the present embodiment is assembled into a vehicle.

(First embodiment)
1. Outline of Vehicle Seat A vehicle seat 1 shown in FIG. 1 is a seat back 3 of a vehicle seat used for a rear seat of a vehicle. The seat back 3 is a part for supporting the back of a seated person. The seat back 3 includes a first seat back 3A, a second seat back 3B, and the like.

The first seat back 3A and the second seat back 3B are arranged side by side in the seat width direction. Specifically, the second seat back 3B is arranged on the left side of the first seat back 3A.

The back frame 5 that constitutes the skeleton of the seat back 3 includes a first back frame 5A, a second back frame 5B, and the like. The first back frame 5A constitutes the skeleton of the first seat back 3A. The second back frame 5B constitutes the skeleton of the second seat back 3B.

The seat back 3, that is, the lower end side of the back frame 5, is fixed to a floor panel (not shown) of the vehicle, etc. via a first hinge bracket 7, a second hinge bracket 8, a tower bracket 10, and the like.

The lower end side of the back frame 5 according to this embodiment is rotatable with respect to the vehicle in the seat longitudinal direction. Specifically, the first hinge bracket 7 and the second hinge bracket 8 are each fixed to the vehicle via hinge bolts 7A and 8A.

The lower end of the tower bracket 10 is immovably fixed to the vehicle. As shown in FIG. 2, the upper end side of the tower bracket 10 is connected to the back frame 5 via a first connection bracket 11, a second connection bracket 12, and the like.

The first connection bracket 11 and the second connection bracket 12 are rotatably connected to the tower bracket 10. Specifically, the first connection bracket 11 and the second connection bracket 12 are connected to the tower bracket 10 via a hinge pin 13.

The first connection bracket 11 is connected to the first back frame 5A via a first mounting bracket 5C welded to the first back frame 5A. The second connection bracket 12 is connected to the second back frame 5B via a second mounting bracket 5D welded to the second back frame 5B.

Note that the first connection bracket 11 and the first mounting bracket 5C are connected with at least one mounting bolt (not shown). The second connection bracket 12 and the second mounting bracket 5D are connected with at least one mounting bolt (not shown).

2. Structural Details of Center Bracket The center bracket includes at least a tower bracket 10, a first connection bracket 11, a second connection bracket 12, and the like.

<Tower bracket>
As shown in FIG. 3, the tower bracket 10 includes an upright portion 10A, a fixed flange portion 10B, and the like. The upright portion 10A is a plate-shaped portion that is substantially perpendicular to the sheet width direction. The fixed flange portion 10B is a portion extending in the seat width direction from the lower end of the upright portion 10A.

A bead portion 10C is provided on the standing portion 10A. The bead portion 10C is a portion forming a reinforcing convex portion, and is a bulge portion that bulges in the sheet width direction with respect to the plate surface of the upright portion 10A.

Note that the bead portion 10C according to this embodiment bulges toward the fixed flange portion 10B side. The upright portion 10A, the fixed flange portion 10B, and the bead portion 10C are integrally molded by performing plastic working such as press working on a single metal plate.

Note that the first connection hole 10D is a through hole through which the hinge pin 13 passes. The fixing holes 10E and 10F are through holes into which bolts (not shown) for fixing the tower bracket 10 to the vehicle are inserted.

<First connection bracket and second connection bracket>
As shown in FIG. 4, the second connection bracket 12 is configured to have a different rigidity from the first connection bracket 11. "Rigidity" in this embodiment mainly refers to the bending rigidity of each of the first connection bracket 11 and the second connection bracket 12.

Specifically, the rigidity of the first connection bracket 11 is the difficulty of bending and deforming the first connection bracket 11 in response to the moment M1 generated by the load F1. The rigidity of the second connection bracket 12 is the difficulty of bending and deforming the second connection bracket 12 in response to the moment M2 generated by the load F2.

In this embodiment, the rigidity of the first connection bracket 11 and the rigidity of the second connection bracket 12 are different because the first circumference dimension L1 and the second circumference dimension L2 are different.
The first circumferential length L1 is a dimension related to the first connection bracket 11, and is a dimension extending along the first connection bracket 11 from the connection part with the tower bracket 10 to the connection part with the first seat back 3A. say.

The second circumferential length L2 is a dimension related to the second connection bracket 12, and is a dimension extending along the second connection bracket 12 from the connection part with the tower bracket 10 to the connection part with the second seat back 3B. say.

Note that the connecting portion between the first connecting bracket 11 and the tower bracket 10 and the connecting portion between the second connecting bracket 12 and the tower bracket 10 correspond to the central axis of the hinge pin 13. The connecting portion between the first seat back 3A and the first connecting bracket 11 and the connecting portion between the second seat back 3B and the second connecting bracket 12 correspond to the center axis of the mounting bolt.

Of the first connection bracket 11 and the second connection bracket 12, at least the connection bracket with low rigidity (in this embodiment, the second connection bracket 12) is provided with a curved portion 14.

The curved portion 14 is a portion of the second connection bracket 12 that is curved so as to be convex toward the rear side of the seat. Therefore, in this embodiment, the second circumferential length L2 is longer than the first circumferential length L1, so the rigidity of the second connecting bracket 12 is smaller than the rigidity of the first connecting bracket 11.

Further, among the first connecting bracket 11 and the second connecting bracket 12, the connecting bracket located on the bead portion 10C side, that is, the second connecting bracket 12 is more rigid than the first connecting bracket 11 located on the opposite side to the bead portion 10C. is small.

That is, the second connection bracket 12 with low rigidity is arranged on the same side of the upright part 10A as the bead part 10C, and the first connection bracket 11 with high rigidity is arranged on the opposite side of the upright part 10A from the bead part 10C. has been done. Note that the same side as the bead portion 10C refers to the bulging side of the bead portion 10C.

3. Characteristics of the vehicle seat (particularly the center bracket) according to the present embodiment The rigidity of the first connecting bracket 11 and the rigidity of the second connecting bracket 12 are configured to be different. As a result, in the vehicle seat 1, the loads F1 and F2 in the seat back and forth direction acting on the seat back 3 are input to the tower bracket 10 via the first connection bracket 11 and the second connection bracket 12 (Fig. reference).

At this time, since the rigidity of the first connecting bracket 11 and the rigidity of the second connecting bracket 12 are different, the timing at which force is input from the first connecting bracket 11 to the tower bracket 10 and the timing when the force is input from the second connecting bracket 12 to the tower bracket 10 are different. The timing at which force is input is out of sync.

Therefore, a torsion moment M3 is induced in the tower bracket 10 that twists and deforms the tower bracket 10 from the connection bracket side with high rigidity (first connection bracket 11) to the side of the connection bracket with low rigidity (second connection bracket 12). (See Figure 4).

Therefore, the tower bracket 10 undergoes plastic deformation while torsionally deforming when a load in the seat back and forth direction is applied to the seat back 3. In addition, the vehicle seat 1 can effectively absorb energy due to the load.

(Other embodiments)
In the embodiment described above, the rigidity of the second connection bracket 12 was smaller than the rigidity of the first connection bracket 11. However, the disclosure herein is not limited thereto. That is, in the disclosure, for example, the rigidity of the second connection bracket 12 may be smaller than the rigidity of the second connection bracket 12.

In the embodiment described above, the first circumferential length L1 and the second circumferential length L2 are different, so that the rigidity of the first connecting bracket 11 and the second connecting bracket 12 are different. However, the disclosure herein is not limited thereto.

That is, the disclosure discloses that, for example, the moment of inertia of the first connecting bracket 11 and the second connecting bracket 12 are different, so that the rigidity of the first connecting bracket 11 and the rigidity of the second connecting bracket 12 are different. may have a different configuration.

Note that methods for varying the moment of inertia of area include, for example, (a) presence or absence of beads, (b) presence or absence of flanges, (c) difference in plate thickness, or (d) presence or absence of through holes. That is, for example, a connection bracket provided with a bead or flange has lower rigidity than a connection bracket without such a bead or flange.

FIG. 5 is an example showing the above (a). The first connection bracket 11 is provided with a bead 11A for increasing rigidity. The second connection bracket 12 is not provided with a structure corresponding to the bead 11A.

Note that the bead 11A is an example of a portion for increasing rigidity. Specifically, the region is a region formed into a protrusion. The first connection bracket 11 and the second connection bracket 12 have a substantially symmetrical configuration except for the presence or absence of the bead 11A.

Further, (a) a configuration in which the materials of the first connection bracket 11 and the material of the second connection bracket 12 are different, or (b) a configuration in which the heat treatment applied to the first connection bracket 11 and the heat treatment applied to the second connection bracket 12 are different. Therefore, the rigidity of the first connection bracket 11 and the rigidity of the second connection bracket 12 may be different.

In the embodiment described above, the curved portion 14 was provided on the connection bracket having low rigidity so as to be convex toward the rear side of the seat. However, the disclosure herein is not limited thereto.

That is, in the disclosure, for example, the curved portion 14 is provided so as to be convex toward the front side of the seat, or the curved portion 14 is provided on both the first connection bracket 11 and the second connection bracket 12, and the rigidity is small. The curvature of the connecting bracket may be larger than the curvature of a rigid connecting bracket.

In the above embodiment, the rigidity of the connecting bracket located on the same side as the bead portion 10C is smaller than the rigidity of the connecting bracket located on the opposite side to the bead portion 10C. However, the disclosure herein is not limited thereto.

That is, in the disclosure, for example, the rigidity of the connecting bracket located on the same side as the bead portion 10C may be greater than the rigidity of the connecting bracket located on the opposite side to the bead portion 10C.

The tower bracket 10 according to the embodiment described above was provided with a bead portion 10C. However, the disclosure herein is not limited thereto. That is, the disclosure may be, for example, a tower bracket 10 in which the bead portion 10C is eliminated.

The seat back 3 according to the above-described embodiment was rotatable in the seat longitudinal direction centering on the lower end side. However, the disclosure herein is not limited thereto. That is, in the disclosure, for example, the first connection bracket 11 and the second connection bracket 12 may be connected and fixed to the tower bracket 10 in an immovable state.

The "rigidity" in the above-mentioned embodiment mainly intended the bending rigidity of each of the first connection bracket 11 and the second connection bracket 12. However, the disclosure herein is not limited thereto. That is, "rigidity" in the disclosure may mainly mean the torsional rigidity of each of the first connection bracket 11 and the second connection bracket 12, for example.

In the embodiments described above, 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 to this, and can also be applied to seats used in vehicles such as railway cars, ships, and aircraft, and stationary seats used in theaters, homes, etc. Applicable.

Furthermore, the present disclosure is not limited to the above-described embodiments as long as it conforms to the spirit of the invention described in the above-described embodiments. Therefore, in a configuration in which at least two of the above-mentioned embodiments are combined, or in the above-mentioned embodiment, any of the illustrated structural features or the structural features described with reference numerals are abolished. It may be configured as follows.

1... Vehicle seat 3... Seat back 3A... First seat back 3B... Second seat back 5... Back frame 5A... First back frame 5B... Second back frame 5C... First mounting bracket 5D... Second mounting bracket 7 ... First hinge bracket 8... Second hinge bracket 10... Tower bracket 10A... Standing part 10B... Fixed flange part 10C... Bead part 10D... First connecting hole 10E, 10F... Fixing hole 11... First connecting bracket 12... Second Connection bracket 13... Hinge pin 14... Curved part

Claims (4)

In a center bracket applied to a vehicle seat including a seat back having a first seat back and a second seat back disposed at a position shifted in the seat width direction with respect to the first seat back,
a tower bracket for supporting the seat back, the tower bracket being disposed between the first seat back and the second seat back and fixed to the vehicle;
a first connection bracket that connects the upper end side of the tower bracket and the first seat back;
a second connection bracket that connects the upper end side of the tower bracket and the second seat back, the second connection bracket having a different rigidity from the first connection bracket;
A dimension related to the first connection bracket, the dimension extending along the first connection bracket from the connection part with the tower bracket to the connection part with the first seat back is a first circumferential length dimension,
A dimension related to the second connection bracket, when the dimension from the connection part with the tower bracket to the connection part with the second seat back along the second connection bracket is defined as a second circumferential length dimension,
The rigidity of the first connection bracket and the rigidity of the second connection bracket are different due to the difference between the first circumference dimension and the second circumference dimension,
Of the first connection bracket and the second connection bracket, at least the connection bracket with low rigidity is provided with a curved portion that is convex toward the rear side of the seat;
A bead portion forming a reinforcing convex portion is provided in a plate-shaped portion of the tower bracket substantially perpendicular to the seat width direction,
Furthermore, among the first connection bracket and the second connection bracket, the connection bracket located on the bead portion side is a center bracket having a lower rigidity than the connection bracket located on the opposite side to the bead portion . In a center bracket applied to a vehicle seat including a seat back having a first seat back and a second seat back disposed at a position shifted in the seat width direction with respect to the first seat back,
a tower bracket for supporting the seat back, the tower bracket being disposed between the first seat back and the second seat back and fixed to the vehicle;
a first connection bracket that connects the upper end side of the tower bracket and the first seat back;
a second connection bracket that connects the upper end side of the tower bracket and the second seat back, the second connection bracket having a different rigidity from the first connection bracket,
The rigidity of the first connecting bracket and the rigidity of the second connecting bracket are different due to the difference in the moment of inertia of the area of the first connecting bracket and the moment of inertia of the area of the second connecting bracket ,
A bead portion forming a reinforcing convex portion is provided in a plate-shaped portion of the tower bracket substantially perpendicular to the seat width direction,
Furthermore, among the first connecting bracket and the second connecting bracket, the connecting bracket located on the bead portion side is a center bracket having a lower rigidity than the connecting bracket located on the opposite side to the bead portion . In vehicle seats installed in vehicles,
a seat back having a first seat back and a second seat back disposed at a position shifted in the seat width direction with respect to the first seat back;
a tower bracket for supporting the seat back, the tower bracket being disposed between the first seat back and the second seat back and fixed to the vehicle;
a first connection bracket that connects the upper end side of the tower bracket and the first seat back;
a second connection bracket that connects the upper end side of the tower bracket and the second seat back, the second connection bracket having a different rigidity from the first connection bracket;
A dimension related to the first connection bracket, the dimension extending along the first connection bracket from the connection part with the tower bracket to the connection part with the first seat back is a first circumferential length dimension,
A dimension related to the second connection bracket, when the dimension from the connection part with the tower bracket to the connection part with the second seat back along the second connection bracket is defined as a second circumferential length dimension,
The rigidity of the first connection bracket and the rigidity of the second connection bracket are different due to the difference between the first circumference dimension and the second circumference dimension,
Of the first connection bracket and the second connection bracket, at least the connection bracket with low rigidity is provided with a curved portion that is convex toward the rear side of the seat;
A bead portion forming a reinforcing convex portion is provided in a plate-shaped portion of the tower bracket substantially perpendicular to the seat width direction,
Further, in the vehicle seat, of the first connecting bracket and the second connecting bracket, the connecting bracket located on the bead portion side has a lower rigidity than the connecting bracket located on the opposite side to the bead portion . In vehicle seats installed in vehicles,
a seat back having a first seat back and a second seat back disposed at a position shifted in the seat width direction with respect to the first seat back;
a tower bracket for supporting the seat back, the tower bracket being disposed between the first seat back and the second seat back and fixed to the vehicle;
a first connection bracket that connects the upper end side of the tower bracket and the first seat back;
a second connection bracket that connects the upper end side of the tower bracket and the second seat back, the second connection bracket having a different rigidity from the first connection bracket;
The rigidity of the first connecting bracket and the rigidity of the second connecting bracket are different because the moment of inertia of the first connecting bracket and the second connecting bracket are different,
A bead portion forming a reinforcing convex portion is provided in a plate-shaped portion of the tower bracket substantially perpendicular to the seat width direction,
Further, in the vehicle seat, of the first connecting bracket and the second connecting bracket, the connecting bracket located on the bead portion side has lower rigidity than the connecting bracket located on the opposite side to the bead portion .