JP7124766B2 - back frame - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a back frame forming a frame of a seat back.

The back side frame of the back frame is rotatable in the seat front-rear direction with respect to the cushion frame, as described in Patent Document 1. The back side frame is a tower-shaped frame forming part of the back frame.

JP 2013-27922 A

Usually, the backside frame is provided with a stopper for restricting the rotation of the backside frame. The stopper restricts the rotation of the back side frame by coming into contact with a contacted portion such as a stopper plate that is immovable with respect to the cushion frame.

Therefore, when the stopper is in contact with the abutted portion, a moment acts on the stopper. The moment is a moment about an axis substantially parallel to the longitudinal direction of the backside frame. Then, if the moment is repeatedly applied to the stopper, there is a risk that cracks will occur in the portion of the back side frame that is fixed to the stopper.

As an example of countermeasures against such cracks, there is a countermeasure method of "increasing the thickness of the members constituting the back side frame." However, this countermeasure method may cause problems such as an increase in manufacturing cost and an increase in mass of the back side frame.

In view of the above points, the present disclosure discloses an example of a back side frame capable of suppressing the occurrence of cracks while suppressing increases in manufacturing cost, mass, and the like.

It is desirable that the back frame, which constitutes the skeleton of the seat back, has at least one of the following constituent requirements, for example.
That is, the constituent elements are a back side frame (72) rotatable in the seat longitudinal direction with respect to the cushion frame, the back side frame (72) being made of a plate material (P), and the back side frame (72) 72), the stopper (80) has a contact portion (81) that contacts a contact portion (91) immovable with respect to the cushion frame, and the contact portion (81) contacts the contact portion (91). A stopper (80) that restricts the rotation of the back side frame (72) by coming into contact with the contact part (91), and a back side frame that is arranged on the opposite side of the stopper (80) with the plate material (P) interposed therebetween. A reinforcing member (100) that reinforces (72), a part of which is fixed to a stopper (80).

As a result, most of the force input to the stopper (80) is transmitted to the reinforcing member (100), so the force input to the plate member (P) is reduced. Therefore, the stress generated in the plate (P) can be reduced without increasing the thickness of the plate (P).

Ultimately, the manufacturer of the back side frame should obtain a back side frame that can suppress the occurrence of cracks in the plate material (P) while suppressing the increase in manufacturing cost and mass. can be done.

In addition, the back side frame may have the following configuration.
That is, one of the reinforcing member (100) and the stopper (80) is provided with a protrusion (101) penetrating the plate (P), and the protrusion (101) is provided with the reinforcing member (100). and the stopper (80) are preferably fixed by welding. Thereby, the manufacturer can reliably and easily fix the reinforcing member (100) and the stopper (80) by welding.

When the abutting portion (81) is in contact with the abutted portion (91), the protrusion (101) is shifted to the abutted portion (91) side with respect to the abutting portion (81). It is desirable to have Thereby, in the back side frame, the occurrence of cracks in the plate material (P) can be reliably suppressed.

Incidentally, the symbols in the parentheses above are examples showing the correspondence with specific configurations and the like described in the embodiments described later, and the present disclosure is limited to the specific configurations and the like indicated by the symbols in the parentheses. not something.

FIG. 4 is a diagram showing a back frame according to the first embodiment; FIG. It is a figure which shows the circumference|surroundings of the stopper which concerns on 1st Embodiment. It is a figure which shows the circumference|surroundings of the stopper which concerns on 1st Embodiment. FIG. 4 is an exploded view around a stopper according to the first embodiment; It is a figure which shows the circumference|surroundings of the stopper which concerns on 1st Embodiment. FIG. 6 is a sectional view taken along the line II of FIG. 5; It is a figure which shows the circumference|surroundings of the stopper which concerns on 2nd Embodiment.

The following "embodiment of the invention" shows an example of an embodiment belonging to 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, structures, etc. shown in the following embodiments.

At least one member or portion described with at least a reference numeral is provided unless otherwise specified as "one" or the like. In other words, two or more members may be provided unless there is a notice such as "one". The invention shown in the present disclosure includes at least components such as members or parts that are labeled and described.

The present embodiment is an example in which the back frame 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). Directional arrows and the like attached to each figure are provided to facilitate understanding of the relationship between the figures.

Therefore, the inventions shown in this disclosure are not limited to the directions shown in each figure. The direction shown in each drawing is the direction in which the vehicle seat according to the present embodiment is assembled to the vehicle.

(First embodiment)
1. Overview of Vehicle Seat A vehicle seat 1 shown in FIG. 1 is a vehicle seat for a rear seat of a vehicle. The vehicle seat 1 is a bench seat type vehicle seat in which a side seat 3 and a center seat 5 are integrated.

The side seat 3 is a seat portion of the vehicle seat 1 on one end side in the vehicle width direction (right end side in this embodiment). The center seat 5 is a seat portion of the vehicle seat 1 adjacent to the side seats 3 .

As shown in FIG. 1, the side seat 3 and the center seat 5 each have seat cushions 3A, 5A and seat backs 3B, 5B. The seat cushions 3A, 5A are parts for supporting the buttocks and the like of the seated person. The seat backs 3B and 5B are parts for supporting the back of the seated person.

The back frame 7 constitutes the skeleton of the seat backs 3B and 5B. The back frame 7 has at least three back side frames 71 to 73 and the like. The back side frames 71 to 73 extend vertically like a tower in the upright state shown in FIG.

That is, the back side frame 71 and the back side frame 72 constitute the skeleton of the seat back 3B. The back side frame 72 and the back side frame 73 constitute the skeleton of the seat back 5B.

That is, the back side frame 72 serves as both the back side frame for the seat back 3B and the back side frame for the seat back 5B. Each of the back side frames 71-73 is connected to a cushion frame (not shown) via connecting members 74A-74C.

The connection members 74A-74C are immobile with respect to the cushion frame. The cushion frame is a member forming the skeleton of the seat cushions 3A, 5A. In other words, the seat frame forming the skeleton of the vehicle seat 1 includes at least the back frame 7, the cushion frame, the connecting members 74A to 74C, and the like.

2. 2. Backside Frame 2.1 Outline of Backside Frame etc. The following description is a detailed description of the connecting portion between the backside frame 72 and the connecting member 74B. 2, the connection portion of the back frame 7 includes a back side frame 72, a connection member 74B, a recliner 75, a stopper 80, a stopper plate 90, a reinforcing member 100 (see FIG. 4), and the like. It is configured.

The back side frame 72 is made of a metal plate material P (see FIG. 4) such as SPCC or SPHC. As shown in FIG. 3, the plate material P is bent to form a back side frame 72 so as to draw a closed curve (rectangular shape in FIG. 3).

The backside frame 72 is fixed to the connection member 74B via the recliner 75. As shown in FIG. The recliner 75 is a mechanism for switching between a rotatable state and a non-rotatable state of the back side frame 72 .

The recliner 75 has a movable portion 75A, a fixed portion 75B, and the like. The movable portion 75A is a portion fixed to the back side frame 72 . The fixed portion 75B is a portion fixed to the connecting member 74B.

When the recliner 75 is in a rotatable state, the backside frame 72 is rotatable with respect to the cushion frame. The back side frame 72 in which the recliner 75 is in a non-rotatable state becomes non-rotatable with respect to the cushion frame. In other words, the backside frame 72 is connected to the cushion frame via the recliner 75 so as to be rotatable in the seat longitudinal direction.

The stopper plate 90 is a member that can rotate in the seat front-rear direction independently of the back side frame 72 . Therefore, even when the stopper plate 90 is stopped with respect to the cushion frame, a case where the back side frame 72 is rotatable with respect to the cushion frame (hereinafter, also referred to as "when contact is possible") occurs. .

As shown in FIG. 5, the stopper 80 is a member that is fixed to the back side frame 72 and has an abutment portion 81 that contacts the abutted portion 91 (see FIG. 2). The abutted portion 91 is a portion that can be immovable with respect to the cushion frame.

Specifically, the abutted portion 91 is provided on the stopper plate 90 . Therefore, when contact is possible, the contacted portion 91 is in an immovable state with respect to the cushion frame. When the back side frame 72 rotates toward the seat front side with respect to the stopper plate 90 when the back side frame 72 can be contacted, the contact portion 81 contacts the contacted portion 91, so that the rotation of the back side frame 72 is restricted. be.

As shown in FIG. 3, when the second contact portion 92 is in contact with the second contact portion 82, there is a gap between the contact portion 91 and the contact portion 81. exists. Therefore, when the back side frame 72 rotates while the second contact portion 92 is in contact with the second contact portion 82 , the contact portion 81 collides with the contact portion 91 .

The second contact portion 82 is a part of the stopper 80 and is located on the side opposite to the contact portion 81 with the contacted portion 91 interposed therebetween in the seat front-rear direction. The second contacted portion 92 is a portion of the stopper plate 90 and is a portion facing the second contact portion 82 .

The reinforcing member 100 is a metal member arranged inside the back side frame 72 . The reinforcing member 100 reinforces at least a portion of the back side frame 72 to which the recliner 75 is fixed. The reinforcing member 100 is welded and fixed to the plate material P, that is, the back side frame 72 .

2.2 Details of stopper, etc. <Structure of stopper>
As shown in FIG. 2, the stopper 80 includes a body portion 83, a stopper fixing portion 84, and the like. The stopper 80, that is, the main body portion 83 and the stopper fixing portion 84 are an integrally molded product obtained by subjecting a single metal plate to plastic working such as press working.

The body portion 83 is a portion provided with the contact portion 81, the second contact portion 82, and the like. The stopper fixing portion 84 is a portion that extends from the main body portion 83 toward the front end side (the upper side in FIG. 2) of the back side frame 72 in the longitudinal direction.

The stopper fixing portion 84 is welded and fixed to the back side frame 72 . Specifically, the stopper fixing portion 84 is welded to the back side frame 72 at the portion indicated by "XX" in FIG.

A portion of the stopper 80 and a portion of the reinforcing member 100 are fixed to each other with the plate material P sandwiched therebetween, as shown in FIG. Specifically, the reinforcing member 100 is arranged on the side opposite to the stopper 80 with the plate material P interposed therebetween. One of the reinforcing member 100 and the stopper 80 (the reinforcing member 100 in this embodiment) is provided with a protrusion 101 penetrating through a through-hole provided in the plate material P. As shown in FIG.

The reinforcing member 100 and the stopper 80 are fixed by welding at the projecting portion 101 . The projecting portion 101 is at a position shifted toward the contacted portion 91 with respect to the contact portion 81 when the contact portion 81 is in contact with the contacted portion 91 .

In this embodiment, when the back side frame 72 rotates toward the front side of the seat, the abutting portion 81 and the abutted portion 91 come into contact with each other. Therefore, the projecting portion 101 according to the present embodiment is located on the seat front side with respect to the contact portion 81 when the back side frame 72 is in the upright state (see FIG. 2).

3. Features of Back Frame (Particularly, Stopper) According to this Embodiment As shown in FIG. 6, a portion of the stopper 80 and a portion of the reinforcing member 100 are fixed to each other with the plate material P sandwiched therebetween. As a result, most of the force input to stopper 80 can be transmitted to reinforcing member 100 .

Therefore, since the force input to the plate material P is reduced, the stress generated in the plate material P can be reduced without increasing the thickness dimension of the plate material P. Ultimately, the manufacturer of the back side frame 72 should obtain a back side frame 72 that can suppress the occurrence of cracks in the plate material P while suppressing increases in manufacturing cost and mass. can be done.

The reinforcing member 100 is provided with a protrusion 101 penetrating through the plate material P, and the reinforcing member 100 and the stopper 80 are fixed by welding at the protrusion 101 . Thereby, the manufacturer can reliably and easily fix the reinforcing member 100 and the stopper 80 by welding.

The projecting portion 101 is at a position shifted toward the contacted portion 91 with respect to the contact portion 81 . Thereby, in the back side frame 72, cracks in the plate material P can be reliably suppressed.

Specifically, it is as follows. That is, the projecting portion 101 is provided in front of the contact portion 81 when the back side frame 72 is in the upright state.
When a moment about an axis substantially parallel to the longitudinal direction of the back side frame 72 acts on the stopper 80, a force is generated that separates the stopper 80 from the plate material P. As shown in FIG. Since most of the force is input to the reinforcing member 100 via the protrusion 101, the force acting on the plate material P can be suppressed. Therefore, the generation of cracks in the plate material P can be reliably suppressed.

(Second embodiment)
In the above-described embodiment, the stopper plate 90 is provided with the contacted portion 91 and the second contacted portion 92 .

On the other hand, in the present embodiment, as shown in FIG. 7, a contacted portion 91A corresponding to the contacted portion 91 and a contacted portion 92A corresponding to the second contacted portion 92 are connected. It is provided on the member 74B.

A contact portion 81A corresponding to the contact portion 81 is provided on the front end face of the stopper 80 in the seat front-rear direction. A contact portion 82A corresponding to the second contact portion 82 is provided on the rear end surface of the stopper 80 in the seat front-rear direction.

In addition, the same code|symbol as the above-mentioned embodiment is attached|subjected to the same component as the above-mentioned embodiment. Therefore, redundant description is omitted in this embodiment.
(Other embodiments)
The projecting portion 101 according to the above-described embodiment, that is, the fixing portion between the reinforcing member 100 and the stopper 80, is located on the seat front side with respect to the contact portion 81 when the back side frame 72 is in the upright state. . However, the disclosure herein is not so limited.

That is, when the back side frame 72 is in an upright state, for example, the fixed portion (projection portion 101) is positioned on the rear side of the seat with respect to the contact portion 81, or is fixed on the front side and the rear side of the seat. A configuration in which (projection portion 101) is provided may be used.

In the above-described embodiment, the reinforcing member 100 was provided with the protrusion 101 . However, the disclosure herein is not so limited. That is, the disclosure may be, for example, a configuration in which the protrusion 101 is provided on the stopper 80 or a configuration in which the protrusion 101 is eliminated.

In the above-described embodiment, the reinforcing member 100 and the stopper 80 are fixed by welding. However, the disclosure herein is not so limited. That is, in the disclosure, for example, the reinforcing member 100 and the stopper 80 may be fixed with fasteners such as rivets or screws.

In the above-described embodiment, the stopper 80 and the like have been described using the back side frame 72 as an example. However, the disclosure herein is not so limited. That is, the disclosure is applicable to other back side frames 71, 73, etc., for example.

In the embodiment described above, the vehicle seat according to the present disclosure is applied to the 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 vehicles, 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 gist of the inventions described in the above-described embodiments. Therefore, in the configuration in which at least two of the above-described embodiments are combined, or in the above-described embodiments, any one of the illustrated constituent elements or the constituent elements described with reference numerals is abolished. It may be configured as

DESCRIPTION OF SYMBOLS 1... Vehicle seat 3... Side seat 3A... Seat cushion 3B... Seat back 5... Center seat 5B... Seat back 7... Back frame 71... Back side frame 75... Recliner 80... Stopper 81... Contact part 90... Stopper plate 91 ... Abutted portion 100 ... Reinforcing member 101 ... Protruding portion P ... Plate material

Claims (3)

In the back frame that forms the skeleton of the seat back,
a back side frame rotatable in the seat longitudinal direction with respect to the cushion frame, the back side frame being made of a plate material;
The stopper fixed to the back side frame has a contact portion that contacts a contact portion that is immovable with respect to the cushion frame, and the contact portion contacts the contact portion. a stopper that restricts the rotation of the back side frame;
A back frame comprising: a reinforcing member disposed on the opposite side of the stopper across the plate member and reinforcing the back side frame, the reinforcing member being partly fixed to the stopper. one of the reinforcing member and the stopper is provided with a protrusion penetrating through the plate material;
2. The back frame according to claim 1, wherein the reinforcing member and the stopper are fixed by welding at the protrusion. 3. The back frame according to claim 2, wherein when the contact portion is in contact with the contacted portion, the protrusion is at a position shifted toward the contacted portion with respect to the contact portion.

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