JP2001104089A - Seat spring assembly and frame device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat frame device by which local deformation can be inhibited to obtain desired distribution of body pressure. SOLUTION: This frame device 10 includes a seat frame 11, and a spring assembly 12 mounted on the seat frame 11. The spring assembly 12 includes a pair of right and left vertical stretched wires 21, 22, and plural horizontal stretched wires 30 stretched between the vertical stretched wires 21, 22. The vertical stretched wires 21, 22 are supported on both side parts 16, 17 of the seat frame 11 through a spring 25 functioning as a connecting member. Bent parts 60, 61 are formed on the longitudinal middle part of each horizontal stretched wire 30. These horizontal stretched wires 30 are arranged so that the bent parts 60, 61 of the adjacent horizontal stretched wires are alternately positioned to shift the bent parts 60, 61 from each other in the cross direction of the seat frame 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat spring assembly suitable for a seat mounted on a vehicle such as a vehicle, a ship or an aircraft, and a frame device using the spring assembly.

[0002]

2. Description of the Related Art In a vehicle seat, a spring assembly is sometimes provided on a seat frame constituting a backrest or a seat. For example, in the seat described in Japanese Patent Publication No. 2-36085 or Japanese Utility Model No. 2595839, a spring assembly constituted by a vertical tension line and a horizontal tension line is fixed to a seat frame by a bracket. In these conventional spring assemblies, a bent portion is provided on each of the transverse lines.

[0003]

In the above-mentioned conventional spring assembly, the positions of the bent portions formed on each of the horizontal tension lines are substantially the same in the width direction of the seat frame. For this reason, when a sitting load is applied, the portion where the bent portion is formed is easily deformed locally, and a smooth body pressure distribution cannot be obtained, and there is room for improvement in ride comfort.

A lumbar support portion (lumbar support) located at the lower portion of the seat frame for the backrest is used as a means for obtaining stronger surface support by connecting a pair of left and right longitudinal tension lines of the spring assembly to each other. Although the installation pitch of the horizontal cable is made denser than other parts,
That alone may not provide enough support.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seat spring assembly and a frame device which can prevent a local deformation, obtain a smooth body pressure distribution, and obtain a desired surface support.

[0006]

In order to achieve the above object, a seat spring assembly according to the present invention comprises a pair of left and right vertical tension lines supported on both sides of a seat frame via connecting members, and each of the vertical tension lines. A horizontal tension line set in which the horizontal tension lines whose both ends are fixed to the line are arranged at a plurality of positions in the longitudinal direction of the vertical tension line, wherein each of the horizontal tension lines has a bent portion at a longitudinal middle portion, Further, the bent portions are formed at different positions so that the bent portions are shifted in the width direction of the seat frame between the horizontally extending wires adjacent to each other.

Further, the seat frame device of the present invention provides a seat frame, a pair of left and right vertical tension lines along both sides of the seat frame, and the vertical tension lines are supported on both sides of the seat frame, respectively. A connecting member, and a horizontal line set in which horizontal lines whose both ends are fixed to the vertical lines are arranged at a plurality of positions in the longitudinal direction of the vertical lines. Part has a bent part,
Further, the bent portions are formed at different positions so that the bent portions are shifted in the width direction of the seat frame between the horizontally extending wires adjacent to each other. In these inventions, a horizontally long loop-shaped auxiliary frame line formed separately from the vertical tension lines may be fixed to a lower portion of each of the vertical tension lines.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. An example of the frame device 10 shown in FIG. 1 is used for a backrest of an automobile seat, and includes a seat frame (seat back frame) 11 functioning as a frame main body and a spring assembly 12 mounted on the seat frame 11. I have. The seat frame 11 includes an upper frame portion 15 made of, for example, a metal pipe or a press-formed product of a metal plate.
And a pair of left and right side portions 16 and 17 extending downward from both ends of the upper frame portion 15 and a lower frame portion 18 connecting the lower portions of the both side portions 16 and 17 to each other.

The spring assembly 12 is mounted on the seat frame 1.
A pair of left and right vertical tension lines 21 and 2 along both sides 16 and 17
2 and the vertical tension lines 21 and 22 are respectively attached to the seat frame 11.
A plurality of springs 25 functioning as connecting members for supporting the both side portions 16 and 17 and a plurality of horizontal tension lines 30 stretched between the vertical tension lines 21 and 22 are provided. The plurality of horizontal lines 30 constitute a horizontal line set 31.

Each of the longitudinally stretched wires 21 and 22 is made of a metal wire such as a steel wire thicker than the horizontally stretched wire 30. The lower portions 21a and 22a of the longitudinally extending wires 21 and 22, that is, the portions corresponding to the lumbar supports are bent in the directions facing each other and are connected to each other by the clips 35, so that they are higher than the portion where the laterally extending wires 30 are provided. Surface support is provided.

An example of the winding spring 25 functioning as a connecting member is, for example, a winding part 40 formed in a loop shape as shown in FIG. 2, and a pair of arm parts 41 and 42 connected to the winding part 40.
And hooks 43, 4 formed at the tips of the arms 41, 42
4 is provided. One end or one hook 43 of the spring 25 is connected to the side 16 (or 1
The connection is established by hooking on a locking portion 50 such as a hole formed in 7). The other end of the spring 25, that is, the other hook 44 is connected by hooking on the longitudinally extending wire 21 (or 22).

The springs 25 allow the spring assembly 12 to be elastically supported on the seat frame 11 under a desired tension. As shown in FIG. 3, a portion 11a of a shape suitable for locking the hook 43 is provided on a part of the seat frame 11, and the locking portion 5 is provided on this portion 11a.
0 may be formed. In addition, instead of using the spring 25, the connecting members made of wires are used to form the longitudinally stretched wires 21 and 22.
May be connected to the seat frame 11.

The plurality of horizontal lines 30 constituting the horizontal line set 31 are formed at plural positions in the longitudinal direction of the vertical lines 21 and 22 (in the case of the backrest frame device 10, plural positions in the vertical direction).
Are arranged at a predetermined interval from each other. Both ends 56 and 57 of each horizontal cable 30 are vertical cable 21 and 22 respectively.
It is fixed by winding it around.

Each of the laterally extending wires 30 has a pair of left and right bent portions 60 and 61 at the middle portion in the longitudinal direction. Bending part 6
A substantially linear straight portion 62 is formed between 0 and 61. Each of the laterally extending wires 30 has a different bending portion 60, 61 in the width direction of the seat frame 11 such that the position of the bending portion 60, 61 is shifted in the width direction of the seat frame 11 between the horizontally extending lines 30 adjacent to each other. It is formed in the position where it was.

That is, these horizontal lines 30 are bent
The straight portion 62 between 0 and 61 has a relatively long span W1.
There are two types of a first horizontal cable 30A and a second horizontal cable 30B of a span W2 in which the straight portion 62 is relatively short.
The first horizontal line 30A and the second horizontal line 30B are alternately arranged in the vertical direction. The number of bent portions 60 and 61 is 2
Not limited to location. In short, it is sufficient to use at least two types of horizontal lines having shapes in which the positions of the bent portions are different between the horizontal lines adjacent to each other.

The bent portions 60 and 61 of this embodiment are symmetrical to each other. These bent portions 60, 61
, From both ends of the straight portion 62,
First bent portion 65 bent at a substantially right angle in a direction along 22
From the first bent portion 65 to both ends 56 of the horizontal cable 30,
It has a second bent portion 66 that is bent obliquely toward 57. The terminal straight portion 6 continues from the second bending portion 66.
7 are formed.

Each of these horizontal lines 30 is connected to each of the bent portions 6.
0, 61 are formed so as to be located substantially in the same plane,
The spring assembly 12 as a whole has a generally flat shape. A pad member (not shown) is provided on the spring assembly 12 (on the occupant side), and the outside of the pad member is covered with a skin material (not shown).

A center cord 70 extending in the vertical direction is provided at a central portion in the longitudinal direction (the center of the sheet) of each of the horizontal wires 30. This center code 70 is used for each horizontal cable 30
Are inserted into the holes 71, and the horizontal positions of the horizontal lines 30 are regulated by passing the horizontal lines 30 through the holes 71.

Spring assembly 1 constructed as described above
2. The frame device 10 having the two
Since the positions of the bent portions 60 and 61 are shifted in the width direction of the seat, local deformation of the spring assembly 12 when a seating load is applied is suppressed, and a smooth body pressure distribution is obtained. As a result, good riding comfort can be obtained.

FIG. 4 shows a second embodiment of the present invention. The seat frame device 10B according to this embodiment includes:
A horizontal rectangular auxiliary frame line 80 is provided at a lower portion of the spring assembly 12.
It has. Since other basic configurations and operational effects are common to those of the first embodiment, the same reference numerals are given to parts common to both embodiments, and description thereof will be omitted.

The auxiliary frame 80 provided in the frame device 10B of this embodiment has a shape in which a metal wire such as a steel wire is formed into a substantially rectangular shape, and both ends of the wire are connected by clips 81 so as to be closed in a loop. . The auxiliary frame 80 includes an upper frame 82, a lower frame 83, and both sides 84 and 85. By fixing the side portions 84 and 85 of the auxiliary frame line 80 to the lower portions of the vertical tension lines 21 and 22 with the clips 86, a strong surface support desired for the lumbar support (lumbar support) is obtained, and a local support is provided. Hit is prevented.

The frame device 10B according to the second embodiment having the above-described configuration also allows the folded portions 60 and 61 of the horizontally extending wires 30 that are adjacent to each other to be displaced in the width direction of the seat. In this way, local deformation of the spring assembly 12 is suppressed, and a smooth body pressure distribution is obtained, so that good riding comfort can be obtained.

In practicing the present invention, the various aspects of the present invention, such as the shape of the seat frame and the specific shape of the bent portion, as well as the vertical tension lines, horizontal tension lines, connecting members, etc., which constitute the spring assembly, are described. It goes without saying that the elements can be variously modified and implemented without departing from the gist of the present invention. The present invention can also be applied to a seat frame device.

[0024]

According to the spring assembly of the first aspect, the position of the bent portion is shifted in the width direction of the sheet between the horizontally extending wires adjacent to each other, so that local deformation is suppressed and smoothness is achieved. A desirable body pressure distribution is obtained. According to the second aspect of the invention, in addition to the effect of the first aspect, a strong surface support suitable for the lumbar support can be obtained in the lower part of the backrest, and a local hit can be prevented.

According to the frame device of the third aspect, local deformation of the spring assembly is suppressed, and a smooth body pressure distribution is obtained, so that a seat with a good ride quality can be obtained. According to the invention described in claim 4,
In addition to the effect of the third aspect, the connecting portion of the spring assembly can have spring properties.

[Brief description of the drawings]

FIG. 1 is a front view of a seat frame device according to a first embodiment of the present invention.

FIG. 2 is a front view showing, in partial cross section, a spring mounting portion of the frame device shown in FIG. 1;

FIG. 3 is a front view showing a modified example of a spring mounting portion of the frame device shown in FIG. 1;

FIG. 4 is a front view of a seat frame device according to a second embodiment of the present invention.

[Explanation of symbols]

 10, 10B ... seat frame device 11 ... seat frame 12 ... spring assembly 16, 17 ... both sides of seat frame 21, 22 ... vertical tension line 25 ... spring (an example of a connecting member) 30 ... horizontal tension line 31 ... horizontal tension line set 60, 61: bent part 80: auxiliary frame line

Claims (4)

[Claims] 1. A pair of left and right vertical tension lines supported on both sides of a seat frame via a connecting member, and a plurality of horizontal tension lines whose both ends are fixed to each of the vertical tension lines at a plurality of longitudinal positions of the vertical tension lines. And each of the horizontal tension lines has a bent portion in the middle portion in the longitudinal direction, and the horizontal portion is adjacent to each other and the bent portion is in the width direction of the seat frame. The bent portions are formed at different positions so as to be displaced from each other. 2. The apparatus according to claim 1, further comprising a horizontal loop-shaped auxiliary frame formed separately from the vertical line, and both side portions of the auxiliary frame are fixed to lower portions of the vertical lines. The spring assembly for a seat according to claim 1. 3. A seat frame, a pair of left and right vertical tension lines along both sides of the seat frame, a connecting member for supporting each of the vertical tension lines on both sides of the seat frame, and A set of horizontal tension lines having both ends fixed to the tension lines at a plurality of longitudinal positions of the vertical tension lines, wherein each of the horizontal tension lines has a bent portion at an intermediate portion in the longitudinal direction. A seat frame device wherein each bent portion is formed at a different position so that the bent portion is shifted in the width direction of the seat frame between the horizontally extending wires adjacent to each other. 4. The connecting member according to claim 3, wherein a spring is used as the connecting member, and one end of the spring is connected to the seat frame, and the other end of the spring is connected to the longitudinal tension line. Frame device for seat.