JP3769429B2 - Seat spring assembly and frame device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat spring assembly suitable for seats mounted on vehicles such as vehicles, ships, and aircraft, and a frame apparatus using the spring assembly.
[0002]
[Prior art]
In an automobile seat, a spring assembly may be provided on a seat frame constituting a backrest or a seat. For example, in the seat described in Japanese Examined Patent Publication No. 2-33605 or registered utility model No. 25958839, a spring assembly constituted by a vertical line and a horizontal line is fixed to the seat frame by a bracket. In these conventional spring assemblies, a bent portion is provided on each horizontal wire.
[0003]
[Problems to be solved by the invention]
In the conventional spring assembly, the positions of the bent portions formed in the respective horizontal wires are aligned at substantially the same position in the width direction of the seat frame. For this reason, when a seating load is applied, a portion where the bent portion is formed is likely to be locally deformed, a smooth body pressure distribution cannot be obtained, and there is room for improvement in riding comfort.
[0004]
Further, the lumbar support portion (lumbar support) located at the lower part of the seat frame for the backrest connects the pair of left and right vertical wires of the spring assembly to each other as a means for obtaining stronger surface support, Although the mounting pitch is made denser than other parts, sufficient support may not be obtained by itself.
[0005]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a seat spring assembly and a frame device that can prevent a local deformation, obtain a smooth body pressure distribution, and obtain a desired surface support.
[0006]
[Means for Solving the Problems]
To achieve the above object, a seat spring assembly according to the present invention includes a pair of left and right vertical wires supported on both sides of a seat frame via connecting members, and a horizontal wire whose both ends are fixed to each vertical wire. Are arranged at a plurality of locations in the longitudinal direction of the longitudinal wire, and the transverse wire is formed between a pair of left and right bent portions formed in the middle portion in the longitudinal direction and between these bent portions. A first horizontal wire having a straight straight portion, a pair of left and right bent portions formed in the middle portion in the longitudinal direction, and the straight portion of the first horizontal wire formed between the bent portions. A second horizontal wire having a shorter straight straight portion, and the first horizontal wire and the second horizontal wire are arranged so that each of the bent portions is positioned substantially in the same plane. by alternately arranging direction, the first adjacent And wherein the second of YokoCho line each other shifted position of the bent portion in the width direction of the seat frame.
[0007]
Also, the seat frame device of the present invention includes a seat frame, a pair of left and right vertical wires along both sides of the seat frame, and a connecting member for supporting the vertical wires on both sides of the seat frame. And a horizontal wire set in which a horizontal wire whose both ends are fixed to each vertical wire is arranged at a plurality of locations in the longitudinal direction of the vertical wire, and the horizontal wire is formed in a middle portion in the longitudinal direction. A pair of left and right bent portions and a first horizontal wire having a straight straight portion formed between the bent portions, a pair of left and right bent portions formed in a middle portion in the longitudinal direction, and the bent portions And a second horizontal line having a straight straight part shorter than the straight part of the first horizontal line, each of the first horizontal line and the second horizontal line being The bends are located in substantially the same plane By alternately arranging the vertical direction, characterized in that shifting the position of the bent portion in the width direction of the seat frame in the first and second YokoCho line with each other adjacent to each other. In these inventions, a horizontally long loop-shaped auxiliary frame line that is configured separately from the vertical line may be fixed to the lower part of each vertical line.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the following, a first embodiment of the present invention will be described 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 that functions as a frame body, and a spring assembly 12 that is attached to the seat frame 11. Yes. The seat frame 11 includes an upper frame portion 15 made of, for example, a metal pipe or a metal plate press-formed product, a pair of left and right side portions 16 and 17 extending downward from both ends of the upper frame portion 15, and both side portions 16 and 17. The lower frame part 18 etc. which connect the lower part of each other.
[0009]
The spring assembly 12 includes a pair of left and right vertical wires 21 and 22 along both side portions 16 and 17 of the seat frame 11 and a connection for supporting the vertical wires 21 and 22 to the both side portions 16 and 17 of the seat frame 11, respectively. A plurality of springs 25 functioning as members and a plurality of horizontal wires 30 stretched between the vertical wires 21 and 22 are provided. These multiple horizontal wires 30 constitute a horizontal wire set 31.
[0010]
The vertical wires 21 and 22 are made of metal wires such as steel wires that are thicker than the horizontal wires 30. The lower portions 21a and 22a of the vertical wires 21 and 22, that is, the portions corresponding to the lumbar supports are bent in the directions facing each other and connected to each other by the clip 35, so that they are higher than the portions where the horizontal wires 30 are provided. Surface support is obtained.
[0011]
An example of the winding spring 25 that functions as a connecting member includes, for example, a winding portion 40 formed in a loop shape as shown in FIG. 2, a pair of arm portions 41, 42 connected to the winding portion 40, Hooks 43 and 44 formed at the tip of 42 are provided. One end of the spring 25, that is, one hook 43 is connected by being hooked on a locking portion 50 such as a hole formed in the side portion 16 (or 17) of the seat frame 11. The other end of the spring 25, that is, the other hook 44 is connected by being hooked on the vertical wire 21 (or 22).
[0012]
These springs 25 elastically support the spring assembly 12 on the seat frame 11 under a desired tension. In addition, as shown in FIG. 3, the part 11a of the shape suitable for latching the hook 43 may be provided in a part of the seat frame 11, and the latching | locking part 50 may be formed in this part 11a. Further, instead of using the spring 25, the vertical wires 21 and 22 may be connected to the seat frame 11 by a connecting member made of only a wire.
[0013]
A plurality of horizontal wires 30 constituting the horizontal wire set 31 are arranged at predetermined intervals at a plurality of longitudinal positions of the vertical wires 21 and 22 (in the case of the backrest frame device 10, a plurality of vertical directions). Has been. Both end portions 56 and 57 of each horizontal wire 30 are fixed by being wound around the vertical wires 21 and 22, respectively.
[0014]
Each of the horizontal wires 30 has a pair of left and right bent portions 60 and 61 at an intermediate portion in the longitudinal direction. A substantially straight straight portion 62 is formed between the bent portions 60 and 61. Each of the horizontal wires 30 has the bent portions 60 and 61 different in the width direction of the seat frame 11 so that the positions of the bent portions 60 and 61 are shifted in the width direction of the seat frame 11 between the adjacent horizontal wires 30. It is formed at the position.
[0015]
In other words, these horizontal wires 30 include a first horizontal wire 30A having a span W1 in which the straight portion 62 between the bent portions 60 and 61 is relatively long, and a second horizontal wire 30B having 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. In addition, the number of the bending parts 60 and 61 is not restricted to two places. In short, it is only necessary to use at least two types of horizontal lines having shapes in which the positions of the bent portions are different between adjacent horizontal lines.
[0016]
The bent portions 60 and 61 of this embodiment form a left and right object shape. These bent portions 60, 61 are both a first bent portion 65 bent substantially at right angles from both ends of the straight portion 62 in the direction along the vertical wires 21, 22, and the first bent portion 65 extends horizontally. It has the 2nd bending part 66 bent toward the both ends 56 and 57 of the wire | line 30 diagonally. A terminal straight portion 67 is formed continuously with the second bent portion 66.
[0017]
These horizontal wires 30 are formed so that the respective bent portions 60 and 61 are located in substantially the same plane, and the spring assembly 12 as a whole has a generally flat shape. A pad member (not shown) is provided on the spring assembly 12 (seater side), and the outside of the pad member is covered with a skin material (not shown).
[0018]
A center cord 70 extending in the up-down direction is provided at the center in the longitudinal direction (the center of the sheet) of each horizontal wire 30. The center cord 70 has a hole 71 through which the horizontal wire 30 is inserted, and the horizontal wire 30 is passed through the hole 71 to restrict the vertical position of the horizontal wire 30.
[0019]
In the frame device 10 having the spring assembly 12 configured as described above, when the seating load is applied because the positions of the bent portions 60 and 61 of the adjacent horizontal wires 30 are shifted in the width direction of the seat. Further, the local deformation of the spring assembly 12 is suppressed, and a smooth body pressure distribution is obtained, so that a good riding comfort can be obtained.
[0020]
FIG. 4 shows a second embodiment of the present invention. The seat frame device 10 </ b> B of this embodiment includes an auxiliary frame line 80 having a horizontally long rectangular shape at the bottom of the spring assembly 12. Since other basic configurations and operational effects are the same as those of the first embodiment, the same reference numerals are given to the portions common to both embodiments, and the description thereof is omitted.
[0021]
The auxiliary frame 80 provided in the frame device 10 </ b> B of this embodiment has a shape in which a metal wire such as a steel wire is formed in a substantially rectangular shape, and both ends of the wire are connected by clips 81 to be closed in a loop shape. The auxiliary frame line 80 includes an upper frame portion 82, a lower frame portion 83, both side portions 84 and 85, and the like. By fixing the both side portions 84 and 85 of the auxiliary frame 80 to the lower portions of the longitudinal wires 21 and 22 with the clips 86, strong surface support desired for the lumbar support (lumbar support) can be obtained, and local Winning is prevented.
[0022]
The frame device 10B of the second embodiment configured in this way also has a spring assembly when seated by the positions of the bent portions 60, 61 of the adjacent horizontal wires 30 being shifted in the width direction of the seat. Since the local deformation of 12 is suppressed and a smooth body pressure distribution is obtained, a good riding comfort can be obtained.
[0023]
In practicing the present invention, the elements constituting the present invention, such as the aspect of the seat frame and the specific shape of the bent portion, as well as the vertical wire, the horizontal wire, and the connecting member that constitute the spring assembly, are Needless to say, various modifications can be made without departing from the scope of the invention. The present invention can also be applied to a seat frame device.
[0024]
【The invention's effect】
According to the spring assembly of the first aspect, since the position of the bent portion is shifted in the width direction of the seat between the adjacent horizontal wires, local deformation is suppressed, and a smooth and desirable body pressure distribution is obtained. can get. According to the second aspect of the present invention, in addition to the effect of the first aspect, strong surface support suitable for the lumbar support is obtained at the lower portion of the backrest, and local contact is prevented.
[0025]
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 having a good riding comfort can be obtained. According to the fourth aspect of the present invention, in addition to the effect of the third aspect, the connecting portion of the spring assembly can have a spring property.
[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.
2 is a front view partially showing a spring mounting portion of the frame device shown in FIG. 1; FIG.
FIG. 3 is a front view showing a modification of the spring mounting portion of the frame device shown in FIG. 1;
FIG. 4 is a front view of a seat frame device showing a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10,10B ... Seat frame apparatus 11 ... Seat frame 12 ... Spring assembly 16, 17 ... Both sides 21 and 22 ... Seat wire 25 ... Spring (an example of a connection member) of a seat frame
30 ... Horizontal wire 31 ... Horizontal wire set 60, 61 ... Bending part 80 ... Auxiliary frame line

Claims (5)

A pair of left and right vertical wires supported via connecting members on both sides of the seat frame;
A horizontal wire set formed by arranging horizontal wires, both ends of which are fixed to each vertical wire, at a plurality of locations in the longitudinal direction of the vertical wires,
The horizontal wire is
A first horizontal wire having a pair of left and right bent portions formed in the middle portion in the longitudinal direction and a straight straight portion formed between the bent portions;
A pair of left and right bent portions formed in the middle portion in the longitudinal direction and a second horizontal wire having a straight straight portion formed between the bent portions and shorter than the straight portion of the first horizontal wire; Including
The first and second horizontal wires are alternately arranged in the vertical direction so that the bent portions are located in substantially the same plane, so that the first and second adjacent wires are adjacent to each other . A seat spring assembly characterized in that the position of the bent portion is shifted in the width direction of the seat frame between the horizontal wires.   2. A horizontally long loop-shaped auxiliary frame line that is configured separately from the vertical line, and both sides of the auxiliary frame line are fixed to the lower part of the vertical line. Spring assembly for seat. A seat frame,
A pair of left and right vertical wires along both sides of the seat frame;
A connecting member for supporting each of the longitudinal wires on both sides of the seat frame,
A horizontal wire set formed by arranging horizontal wires, both ends of which are fixed to each vertical wire, at a plurality of locations in the longitudinal direction of the vertical wires,
The horizontal wire is
A first horizontal wire having a pair of left and right bent portions formed in the middle portion in the longitudinal direction and a straight straight portion formed between the bent portions;
A pair of left and right bent portions formed in the middle portion in the longitudinal direction and a second horizontal wire having a straight straight portion formed between the bent portions and shorter than the straight portion of the first horizontal wire; Including
The first and second horizontal wires are alternately arranged in the vertical direction so that the bent portions are located in substantially the same plane, so that the first and second adjacent wires are adjacent to each other . A seat frame device in which the position of the bent portion is shifted in the width direction of the seat frame between the horizontal wires.   4. The seat frame device 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 vertical wire. The bent portions of the first and second horizontal wires are a first bent portion bent in a direction along the vertical wire from both ends of the straight portion, and the horizontal wire from the first bent portion, respectively. The seat spring assembly according to claim 1, further comprising a second bent portion bent obliquely toward both ends of the seat.

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