JP7099268B2 - Vehicle seat frame - Google Patents

Description

The present invention relates to a vehicle seat frame. More specifically, the present invention relates to a vehicle seat frame provided with a panel frame that supports the seat pad from the back side in a planar manner.

Conventionally, as a seat frame for a vehicle, it is known that a panel frame of a seat cushion is formed with a relief portion for releasing body pressure directly under the ischial nodule (Patent Document 1). The relief portion is formed as a recess or a hole at two positions on the left and right just below the ischial nodule portion of the panel frame.

Japanese Unexamined Patent Publication No. 2001-286365

In the above-mentioned conventional technique, when another concave portion such as a bead is set between both relief portions, a sufficient separation width cannot be secured between the two relief portions, the formability of each deteriorates, or the boundary portion of each is deteriorated. There is a risk of a narrow shape that makes it easy to feel a foreign body sensation. The present invention was invented to solve the above-mentioned problems, and the problem to be solved by the present invention is to be able to appropriately set a plurality of recesses on the panel frame constituting the vehicle seat frame. To be.

In order to solve the above problems, the vehicle seat frame of the present invention takes the following means.

That is, the vehicle seat frame of the present invention is a vehicle seat frame provided with a panel frame that supports the seat pad from the back side in a plane shape. A first recess extending in the in-plane direction intersecting the seat width direction formed by denting the panel frame at the center position in the seat width direction in the top plate main on the back side, and two in the seat width direction sandwiching the first recess. It has a pair of second recesses formed by being recessed on the back side at a position of a portion, and a connecting recess connecting the pair of second recesses and the first recess in a continuous concave shape.

According to the above configuration, the first recess and the pair of second recesses formed on both sides thereof are formed in a concave shape connected to each other by the connecting recess. Therefore, a narrow boundary shape is not formed between these concave shapes. Therefore, these concave shapes can be collectively formed with good moldability. Further, the panel frame can be formed into a frame shape in which a foreign body sensation is less likely to be felt.

Further, the vehicle seat frame of the present invention may be further configured as follows. Each of the pair of second recesses is a seat portion that is applied to and joined to another frame passing through the back side of the panel frame.

According to the above configuration, the size and shape of the pair of second recesses can be appropriately functioned as a seat while ensuring the formability of the first recess and the pair of second recesses and the dispersibility of body pressure of the panel frame. Can be set.

Further, the vehicle seat of the present invention may be further configured as follows. The cross section cut in the seat width direction of the panel frame has a concave curved surface shape like a bow, in which the center position in the seat width direction in the top plate main projects to the back side most.

According to the above configuration, the first recess and the pair of second recesses are formed in a shape that has good moldability and does not hinder the body pressure dispersibility of the panel frame with respect to the panel frame having the concave curved surface shape. Can be done. In particular, when the pair of second recesses are applied to and joined to another frame passing through the back side of the panel frame, these second recesses are centered in the seat width direction with a small amount of narrowing down to the back side. Even if it is formed at a position closer to it, it is effective because a narrow boundary shape is not formed between it and the first recess.

Further, the vehicle seat of the present invention may be further configured as follows. The panel frame is referred to as the seat back frame. The first recess is a seat pressure reducing portion that reduces contact with the spine of the seated occupant.

According to the above configuration, the first recess can appropriately enhance the body pressure dispersibility of the back of the seated occupant by the panel frame.

It is a perspective view which showed the schematic structure of the seat frame for a vehicle which concerns on 1st Embodiment. It is a perspective view which showed the frame structure of a seat back. It is the same front view. FIG. 3 is a sectional view taken along line IV-IV of FIG. FIG. 3 is a sectional view taken along line VV of FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

<< First Embodiment >>
First, the configuration of the vehicle seat frame according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 5. In the following description, when each direction such as front-back, up-down, left-right, etc. is shown, it means each direction shown in each figure. Further, when a "sheet" is attached to each direction such as "seat width direction", it means each direction with reference to the sheet 1 described later. For example, when the term "seat width direction" is used, it means the left-right direction of the seat 1.

As shown in FIG. 1, the vehicle seat frame according to the present embodiment is applied to a seat 1 forming an aircraft seat. The seat 1 includes a seat back 2 which is a backrest portion of a seated occupant and a seat cushion 3 which is a seating portion. The seat back 2 has a so-called high-back type configuration in which a headrest portion 2H serving as a head rest portion of the seated occupant is provided in an upper region of a top plate main 2A that supports the back of the seated occupant.

The seat back 2 is a metal back frame 2F forming the skeleton, a urethane foam back pad 2P attached to the front part of the back frame 2F, and a fabric back that collectively covers these from the outer peripheral side. A cover 2C and the like are provided. The back frame 2F includes a panel frame 10 made of a pressed iron plate, and the panel frame 10 widely supports the back pad 2P from the back side (rear side) in a plane shape. Here, the back frame 2F corresponds to the "vehicle seat frame" of the present invention. Further, the back pad 2P corresponds to the "seat pad" of the present invention.

The back pad 2P is assembled so as to widely wrap the entire back frame 2F from the front side. As a result, the back pad 2P is widely supported in a plane shape from the rear side by the back frame 2F, and elastically receives the backrest load of the seated occupant.

The back cover 2C is set by covering the assembled back pad 2P and back frame 2F from above the seat in a bag shape. As a result, the back cover 2C forms the appearance design of the seat back 2 and holds the position of the back pad 2P in a state of being assembled to the back frame 2F.

As shown in FIGS. 2 to 3, the back frame 2F is composed of a planar panel frame 10 and a frame-shaped pipe frame 20 that supports an outer peripheral portion of the panel frame 10. The pipe frame 20 is formed by assembling a metal square pipe material into a frame shape. Specifically, the pipe frame 20 is integrally between the inverted U-shaped pipe 21 in which one square pipe material is bent into an inverted U-shaped shape when viewed from the front and both legs of the inverted U-shaped pipe 21. It consists of a lower pipe 22 made of a single crosslinked straight square tube material.

The left and right and upper outer peripheral portions of the panel frame 10 are rivet-bonded integrally to the left and right and upper frame portions of the pipe frame 20 from the front side, respectively (see FIGS. 4 to 5). Further, in the panel frame 10, a pair of left and right second recesses 12 formed in the lower center in the seat width direction each come into surface contact with the above-mentioned lower pipe 22 passing through the back side (rear side of the seat) from the front side. It is applied to the above-mentioned state and is integrally connected by the rivet R (see FIG. 4). By each of the above assembly, the panel frame 10 is in a state where substantially the entire circumference thereof is supported from the back side by the pipe frame 20. Here, the lower pipe 22 corresponds to "another frame" of the present invention.

As shown in FIGS. 2 to 5, the panel frame 10 is formed in a concave curved surface shape that is slightly recessed toward the back side (rear side of the sheet) in a bow shape. As a result, the panel frame 10 has a configuration in which the back of the seated occupant is surface-supported so as to be widely wrapped from the rear side by the concave curved surface shape along the shape, and good body pressure distribution can be performed. Specifically, as shown in FIG. 4, in the panel frame 10, the lower region of the top plate main 2A to which the vicinity of the waist of the seated occupant is applied from the rear side is the back side (seat) at the center position C in the seat width direction. It is formed in a cross-sectional shape that has a concave curved surface shape like a bow that overhangs (rear side).

Along with this, the pair of left and right second recesses 12 formed in the lower region are formed at a position closer to the center closer to the lower pipe 22 on the back side (rear side of the seat) by the concave curved surface. As a result, the pair of second recesses 12 are configured so that the amount of squeezing out can be suppressed to a small extent when they are drawn from the panel frame 10 to the back side (rear side of the sheet). Therefore, the pair of second recesses 12 can be easily molded and have excellent structural strength.

As shown in FIGS. 2 to 3, a first recess 11 extending in the seat height direction (in-plane direction intersecting the seat width direction of the panel frame 10) is formed between the pair of second recesses 12. Has been done. The first recess 11 is located at the center position C in the top plate main 2A in the seat width direction, and is formed at a position corresponding to a portion where the spine of the seated occupant touches. The first recess 11 has a shape that extends straight from a position lower than the formed portion of each of the second recesses 12 in the seat height direction to a position higher than the formed portion.

The first recess 11 and each second recess 12 are connected to each other and have a shape in which they are connected to each other in a continuous flush-like concave shape by the recess 13. As a result, the first recess 11 and each of the second recesses 12 are formed in a shape that is substantially a cross shape due to the shape in which they are connected to each other. The first recess 11 and each second recess 12 have a shape recessed to substantially the same depth. The first recess 11 has a shape in which the depth of the recess is inclined and shallow from a position beyond the space between the second recesses 12 to the upper side.

Since the first recess 11 and each second recess 12 have a concave shape that is continuous with each other, they can be easily formed together by one drawing process. More specifically, in the case of the drawing process, it is not necessary to set a narrow boundary shape between the first concave portion 11 and each of the second concave portions 12, so that each can be formed with good formability. Further, a frame shape in which a foreign body sensation due to a narrow boundary shape is easily felt is not formed between the first recess 11 and each second recess 12. Therefore, the panel frame 10 can be formed into a frame shape having good body pressure dispersibility.

In the panel frame 10 having the above configuration, as shown in FIGS. 3 to 4, the pair of left and right second recesses 12 described above face each other from the front side to the above-mentioned lower pipe 22 passing through the back side (rear side of the seat). It is applied to the abutted state and is integrally connected by the rivet R (see FIG. 4). At that time, the panel frame 10 is in contact with the pair of left and right second recesses 12 and the first recess 11 which is aligned in the seat width direction and forms a surface contact with the lower pipe 22 from the front side (FIG. 4). -See FIG. 5).

Summarizing the above, the vehicle seat frame (back frame 2F) according to the first embodiment has the following configuration. That is, it is a vehicle seat frame (2F) provided with a panel frame (10) that supports the seat pad (2P) in a plane from the back side. The first recess (11) in which the panel frame (10) is formed by being recessed on the back side at the center position (C) in the seat width direction in the top plate main (2A) and extends in the in-plane direction intersecting the seat width direction. A pair of second recesses (12) formed by denting on the back side at two positions in the seat width direction sandwiching the first recess (11), and a pair of second recesses (12) and first recesses (11). ) And a connecting recess (13) connecting the two in a continuous concave shape.

According to the above configuration, the first recess (11) and the pair of second recesses (12) formed on both sides thereof are formed in a concave shape connected to each other by the connecting recess (13). Therefore, a narrow boundary shape is not formed between these concave shapes. Therefore, these concave shapes can be collectively formed with good moldability. Further, the panel frame (10) can be formed into a frame shape in which a foreign body sensation is less likely to be felt.

Further, the pair of second recesses (12) are used as seats to be applied to and connected to another frame (22) passing through the back side of the panel frame (10). According to the above configuration, the pair of second recesses (12) is formed while ensuring the formability of the first recess (11) and the pair of second recesses (12) and the body pressure dispersibility of the panel frame (10). It can be set to a size and shape that allows it to function properly as a seat.

Further, the cross section of the panel frame (10) cut in the sheet width direction has a concave curved surface shape in the top plate main (2A) in the shape of a bow that protrudes most to the back side at the center position (C) in the sheet width direction. .. According to the above configuration, with respect to the panel frame (10) having a concave curved surface shape, the first concave portion (11) and the pair of second concave portions (12) have good moldability, and the panel frame (10) has a good formability. It can be formed in a form that does not impair body pressure dispersibility. In particular, when the pair of second recesses (12) are applied to another frame (22) passing through the back side of the panel frame (10) to form a seat portion to be joined, these second recesses (12) are used. Even if it is formed at a position closer to the center in the width direction of the sheet where the amount of narrowing down to the back side is small, it is effective because a narrow boundary shape is not formed with the first recess (11).

Further, the panel frame (10) is used as the frame of the seat back (2). The first recess (11) is a seat pressure reducing portion that reduces the contact of the seated occupant with the spine. According to the above configuration, the first recess (11) can appropriately enhance the body pressure dispersibility of the back of the seated occupant by the panel frame (10).

<< About other embodiments >>
Although the embodiments of the present invention have been described above using one embodiment, the present invention can be implemented in various embodiments shown below in addition to the above embodiments.

1. 1. The vehicle seat frame of the present invention can be applied not only to seats for aircraft but also to seats used for various vehicles such as vehicles such as automobiles and railways and ships. Further, the panel frame can be applied not only to the seat back but also to a frame having another seat structure such as a seat cushion. Further, the panel frame may have a flat surface shape in addition to the concave curved surface shape as shown in the above embodiment.

2. 2. When the panel frame is applied to the seat cushion, for example, a pair of second recesses is used as a relief part for releasing body pressure just below the ischial nodule of the seated occupant, and a first recess formed between them is a bead (a bead (). It may be a throttle shape for reinforcement). In addition, the first recess and the pair of second recesses may be configured as a relief portion for body pressure distribution. Further, the first recess and the pair of second recesses may be used to fix seat equipment such as a wire harness passing through the back side of the panel frame.

3. 3. The length in the sheet width direction of the shape connecting the pair of the second recesses via the connecting recesses may be longer or shorter than the length extending in the in-plane direction where the first recess intersects the sheet width direction. good. Moreover, it may be the same. The pair of second recesses may not necessarily be formed in a symmetrical shape at symmetrical positions in the sheet width direction sandwiching the first recesses, and may be formed at positions asymmetrical with each other. Further, it may be formed in an asymmetrical shape. Further, the concave shape of the first concave portion and each second concave portion is not limited to a specific shape, and can be set to various shapes according to the purpose of use.

4. The panel frame is not limited to the metal panel material, and may be made of a resin panel material. Further, the panel frame is integrally connected to the frame-shaped frame forming the main skeleton of the vehicle seat frame, and is also provided in a state of being elastically supported via an elastic member such as a spring. May be. Further, the panel frame may be assembled as a movable frame such as a support plate of a movable lumbar support by being attached to the main skeleton via a movable mechanism.

5. The other frame to which the pair of second recesses are applied through the back side of the panel frame is not limited to the seat frame, and may be a frame material on the vehicle body side such as a partition panel. Further, the connection of the pair of second recesses to another frame may be performed by another connection method such as welding or screw fastening, in addition to the rivet connection.

1 seat (vehicle seat)
2 Seat back 2A Top plate main 2F Back frame (seat frame for vehicles)
2P back pad (seat pad)
2C back cover 2H headrest 3 seat cushion 10 panel frame 11 1st recess 12 2nd recess 13 connecting recess 20 pipe frame 21 inverted U-shaped pipe 22 lower pipe (another frame)
R rivet C center position in the seat width direction

Claims (3)

A vehicle seat frame equipped with a panel frame that supports the seat pad of the seat back from the back side in a planar manner.
The panel frame
The first recess formed by denting in the center position in the seat width direction of the top plate main so as to extend in the seat height direction toward the back side,
A pair of second recesses formed by denting toward the back side at two positions in the seat width direction sandwiching the first recess,
It has a connecting recess that connects the pair of second recesses and the first recess in a continuous concave shape.
A vehicle seat frame in which the first recess is a seat pressure reducing portion . The vehicle seat frame according to claim 1.
A vehicle seat frame in which the pair of second recesses are applied to and joined to another frame passing through the back side of the panel frame. The vehicle seat frame according to claim 1 or 2.
A vehicle seat frame having a cross section cut in the seat width direction of the panel frame and having a concave curved surface shape in the shape of a bow, in which the central position of the top plate main in the seat width direction projects to the back side most.

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