JP2747189B2 - Spring structure for seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame-shaped base frame to be mounted in a vehicle seat or the like typified by a vehicle seat, an outer frame wire spaced above the base frame, and The present invention relates to a seat spring structure including a formed wire interposed between a frame and an outer frame wire.

[0002]

2. Description of the Related Art A conventional spring structure for a seat of this type is disclosed in, for example, Japanese Patent Application Laid-Open No. 4-325330. That is, a conical coil spring or a bow-shaped S-spring is interposed between a pad supporter formed by stretching a plurality of formed wires in a frame-shaped wire and a frame disposed below the pad supporter. Thereby, the pad supporter is supported with a cushioning property with respect to the frame.

[0003]

However, in such a conventional technique, in order to enhance the cushioning property, in addition to the formed wire stretched in the frame-shaped wire, the wire is resiliently attached to the frame. A conical coil or S-spring to be supported is required separately. In particular, since a large load is applied to the pad side portion when getting on and off, the vicinity of the side end of the wire that supports the pad side portion has a large difference in deflection to improve the getting on and off, and has a sufficient spring feeling. It is necessary to provide an S spring or the like separately from the formed wire. As a result, there are problems that the number of parts increases, the number of assembling steps increases, and the cost increases.

The present invention has been made in view of such conventional problems, and it is possible to reduce the number of parts and the number of assembling steps, thereby reducing costs and obtaining a sufficient spring feeling. It is an object of the present invention to provide a seat spring structure capable of enhancing cushioning properties and improving a seating sensation, and in particular, enhancing cushioning properties of a pad side portion and improving getting on and off.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a frame-shaped base frame (20) to be installed in a seat and the base frame (2).
An outer frame wire (60) spaced apart from the upper side of (0) and a formed wire (30, 40, 50) interposed between the base frame (20) and the outer frame wire (60). In the seat spring structure (10) provided, the outer frame wire (60) is formed by bending a wire material, and at least a front width larger than a width in both sides of the base frame (20) is provided. And the above-mentioned formed wire (3
0, 40, 50) are formed by bending a wire, and are developed in both directions along the surface surrounded by the outer frame wire (60) to support pads (31, 41, 51) for placing pads. And outer frame wires (6) from both ends of the support receiving portions (31, 41, 51).
0) and an upper fixing portion (32, 42, 52) which extends and is fixed to the outer frame wire (60);
2, 42, 52) and bent obliquely downward toward the inside of the outer frame wire (60), and then bent again at a substantially intermediate position between the outer frame wire (60) and the base frame (20) to fix the upper side. Resilient portions (33, 43, 53) extending in parallel with the portions (32, 42, 52) and further bent and extending obliquely downward toward the outside of the outer frame wire (60); 4
3, 53) and connected to the lower end of the base frame (20).
And a lower fixing portion (34, 44, 54) that is fixed to the
A plurality of the formed wires (30, 40, 50) are arranged at predetermined intervals from the front end side to the rear end side between the base frame (20) and the outer frame wire (60). Formed wire to distribute (40)
The upper fixing portion (42) of the outer frame wire (60) is stopped at the side end (62a) of the outer frame wire (60) in a state of extending laterally from the side edge (22a) of the base frame (20) located below. The extended end of the formed formed wire (40) including the upper fixing portion (42) is defined as an overhang portion (L), and the overhang portion (L) is displaced downward by receiving a load. In this case, the side edge (22) of the base frame (20) with which the
The spring structure for a seat (10) is characterized in that a spring is elastically displaceable further below the fulcrum with the fulcrum being a).

[0006]

According to the present invention, since the formed wire (30, 40, 50) can freely set a bending pitch, a bent shape, and the like, in the present invention, the wire rod is bent, expanded in both directions, and placed on a support receiving pad. (31, 41, 51) and the support receiving part (31, 4).
Resilient portions (33, 43, 53) which are bent into predetermined shapes from both ends of the resilient portions (1, 51) and serve as springs, and the resilient portions (33, 4).
3, 53) are formed as dedicated-type formed wires (30, 40, 50) having lower fixing portions (34, 44, 54) connected to the lower end of the base frame (20).

The formed wire (30, 40, 5) extends from the front end to the rear end between the base frame (20) and the outer frame wire (60) disposed above the base frame (20).
0) are arranged side by side at predetermined intervals. Thereby, a sufficient spring feeling can be obtained only by the formed wire (30, 40, 50) without using an auxiliary conical coil spring or the like, and an optimal cushioning property is provided for a part necessary for sitting comfort. You can have.

Each formed wire (30, 40, 50)
When the formed wire (40) disposed on the front end side is assembled, the upper fixing portion (42) extends laterally from the side edge (22a) of the base frame (20) located below. In this state, it is fixed to the side end (62a) of the outer frame wire (60). A side end of the extended formed wire (40) including the upper fixing portion (42) is defined as an overhang portion (L).

The overhang portion (L) of the formed wire (40) is displaced downward when a load is applied to the side end (62a) of the outer frame wire (60), and the overhang portion (L). Of the base frame (20) engages with the side edge (22a) of the base frame (20), so that the side edge (22a) is used as a fulcrum, and the overhang portion (L) is elastically further below the fulcrum. It is configured as a displaceable spring.

Therefore, the side end of the formed wire (40) is not only resiliently deformed by the resilient portion (43) which essentially functions as a spring, but also has the extended portion (L) lowered. The side edge (22) of the base frame (20) engaged when displaced
Since the extension (L) can be resiliently displaced further downward with the a) as a fulcrum, a large deflection difference can be ensured.

As a result, the cushioning property of the pad side portion held by the side end of the formed wire (40) is enhanced, and the seating feeling is improved. In the case of a vehicle seat, the side of the vehicle seat is provided. When getting on and off from the side, the pad side is largely bent, so that the operation of putting and removing the foot on the pad from the side of the seat is easier, and the getting on and off property is improved.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of the present invention. As shown in FIG. 1, a seat spring structure 10 constitutes a vehicle seat, and includes a frame-shaped base frame 20 provided inside the seat, and an outer frame spaced above the base frame 20. A wire 60, a formed wire 30 interposed between the base frame 20 and the outer frame wire 60,
40 and 50.

The base frame 20 is formed by solidifying an angle member bent into an L-shaped cross section into a square shape, and includes a front end 21, both side ends 22, 22, and a rear end 23. Each of the ends 21, 22, and 23 has a substantially horizontal bottom surface and an edge standing upright at a substantially right angle from the bottom surface.
As shown in FIG. 2, a felt member 80 is attached to a side edge 22 a of the side end 22 to prevent generation of abnormal noise when a part of the formed wire 40 described later is engaged. .

The outer frame wire 60 is formed by bending a wire into a substantially square shape so as to correspond to the base frame 20, and has a lateral width in the front half of both sides (side convex ends 62a, 62a on both sides).
Is larger than the width of the base frame 20, while
Lateral width of both sides in the second half (side concave ends 62b, 62b on both sides)
The distance between them is substantially equal to the width of the base frame 20. The length of the outer frame wire 60 and the length of the base frame 20 in the front-rear direction are substantially equal.

A plurality of formed wires 30, 40, 50 are arranged at predetermined intervals from the front end side to the rear end side between the base frame 20 and the outer frame wire 60. The formed wires 30, 40, and 50 are formed by bending a wire material into three types of dedicated molds having slightly different bent shapes and the like.

As shown in FIG. 1, the formed wire 30 disposed at the forefront is developed in both directions along the surface surrounded by the outer frame wire 60, and a pad (not shown) is placed thereon. A support receiving portion, an upper fixing portion extending from both ends of the support receiving portion and overlapping with the outer frame wire, and fixed to both sides of a front end of the outer frame wire; And a front end 2 of the base frame 20 which is connected to a lower end of the elastic portion 33 and serves as a spring.
And a lower fixing portion 34 fixed to the bottom portion on both sides.

More specifically, the resilient portion 33 is located inside the outer frame wire 60 (the front end 6) from both ends of the upper fixing portion 32.
The first inclined bar 3 which is bent obliquely downward toward the rear side of 1)
3a, a torsion bar 33b extending substantially parallel to the upper fixing portion 32 at a substantially intermediate position between the outer frame wire 60 and the base frame 20, and an outer side of the outer frame wire 60 (front end 61 side).
And a second inclined bar 33c that extends obliquely downward and extends in a row.

The upper fixing portion 32 is provided with an outer frame wire 60.
Is fastened firmly by the fixing clip 1 having a substantially C-shaped cross section in a state where the front end 61 is double-fitted with the front end 61. The wires of the outer frame wire 60 and the formed wires 30, 40, 50 are similarly connected to each other in the same manner.
To each other. On the other hand, the lower fixing portion 34 is fixed to the base frame 2 by a predetermined fixing tool (not shown).
0 is fixed to the bottom surface. The same applies to the lower fixing portions 44, 54 of the other formed wires 40, 50.

As shown in FIGS. 2 to 4, the formed wire 40 disposed second from the foremost end has the same basic components as those of the formed wire 40.
1, upper fixed part 42, resilient part 43 (first inclined bar 43a
And a torsion bar 43b and a second inclined bar 43c. ) And the lower fixing portion 44, but the bending shape is slightly different from that of the formed wire 30. That is, the formed wire 40 is connected to the upper fixing portion 42 and the lower fixing portion 4.
4 differs from the above-described formed wire 30 in which the upper fixing portion 32 and the lower fixing portion 34 extend in parallel with the front end 61 of the outer frame wire 60 in that it extends in parallel with the side end 62 of the outer frame wire 60.

The upper fixing portion 42 of the formed wire 40
Is a side edge 22a of the base frame 20 located below.
In a state where the outer frame wire 60 extends further to the side,
2 is fixed to the side convex end 62a having a particularly large width. Then, the side end side of the formed wire 40 extending laterally from the side edge 22a of the base frame 20 is connected to the overhang portion L.
The protruding portion L is displaced downward when a load is applied as shown in FIG.
The spring is configured to be resiliently displaceable further downward with the 2a as a fulcrum. The lower fixing portion 44 is fixed to the bottom surface of the side end 22 of the base frame 20.

The second formed wire 40 from the front end
The remaining three formed wires 50 following the back of the wire are the same in shape, and their basic components are the support receiving portion 51 and the upper fixing portion 5 as in the case of the formed wire 40.
2, a resilient portion 53 (comprising a first inclined bar 53a, a torsion bar 53b, and a second inclined bar 53c), and a lower fixing portion 54.

The formed wire 50 has an upper fixed portion 52 in that the span between the upper fixed portion 52 and the torsion bar 53b is short so that the upper fixed portion 52 is located almost directly above the side edge 22a of the base frame 20. The span between the portion 42 and the torsion bar 43b is different from that of the formed wire 40 formed longer. Therefore, the upper fixing portion 52 of the formed wire 50 is fixed to the side concave end 62 b of the side end 62 of the outer frame wire 60, the width of which is substantially equal to that of the base frame 20.

As shown in FIG. 1, a reinforcing wire 70 is separately provided on the outer frame wire 60. Reinforcing wire 70
Are formed on both sides of the rear end 63 of the outer frame wire 60 and the pad shape retaining portion 72 extending in the front-rear direction outside the recesses 62b, 62b on both sides of the outer frame wire 60 and holding a pad side portion (not shown). It has a double fixing portion 71 for fastening. The front end of the pad shape retaining portion 72 is connected to the side projection 62 of the outer frame wire 60.
a and the side concave portion 62b is fixed by the fixing clip 1.

An intermediate portion between both rear ends 63 of the outer frame wire 60 is bent in a substantially U-shape toward the inside of the outer frame wire 60 to form a load receiving portion 64. The load receiving portion 64 is overlapped with the support receiving portion 51 of the formed wire 50 at the rearmost end and fixed by the fixing clip 1.

Next, the operation will be described. Unlike the S spring, the formed wire can freely set a bending pitch, a bent shape, and the like. In the present embodiment, the wire is bent as shown in FIG. 40,5
0 is formed. Each of these formed wires 30, 40,
Reference numerals 50 denote support receiving portions 31, 41, and 51 for deploying pads on both sides and placing pads, and supporting receiving portions 31, 41, and 51, respectively.
Resilient portion 3 which is bent into a predetermined shape from both ends of the member and serves as a spring
3, 43, 53, and lower fixing portions 34, which are connected to the lower ends of the resilient portions 33, 43, 53 and fasten to the base frame 20,
44 and 54 are formed.

From the front end side to the rear end side between the base frame 20 and the outer frame wire 60, a plurality of the formed wires 30, 40, 50 are arranged at predetermined intervals. In this case, the upper fixing portion 32 of the foremost formed wire 30
Are fixed to both sides of the front end 61 of the outer frame wire 60 parallel thereto, and the lower fixing portions 34 are fixed to the bottom surfaces of both sides of the front end 21 of the base frame 20 parallel thereto.

On the other hand, each of the formed wires 4
0, 50, the upper fixing portions 42, 52
Are fixed to both ends 62, 62 of the outer frame wire 60 parallel thereto, and the lower fixing portions 44, 54 are fixed to the bottom surfaces of the both ends 22, 22 of the base frame 20 parallel thereto. I do.

Thus, in the frame of the outer frame wire 60, each of the formed wires 30, 4 developed in both directions.
Since the support receiving portions 31, 41, and 51 of 0 and 50 are connected to each other on the same plane in the front-rear direction, it is possible to sufficiently secure the rigidity of the spring surface of the seat spring structure 10 on which the pad (not shown) is placed. it can.

Moreover, the spring portions 33, 43, 53 of the formed wires 30, 40, 50 themselves can be used without using a conical coil spring or the like which elastically supports the S spring or the like from below.
With only this, it is possible to obtain a sufficient spring feeling and to provide an optimum cushioning property to a part necessary for comfortable sitting.

In particular, regarding the second formed wire 40 from the front end, the upper fixed portion 42
To the side edge 22a of the base frame 20 located below.
In a state where it extends further to the side, it is fixed to the side convex end 62a of the outer frame wire 60. A side end of the extended formed wire 40 including the upper fixing portion 42 is defined as a projecting portion L.

As shown in FIG. 2, the formed wire 40
Of the outer frame wire 60 is displaced downward when a load is applied to the side protruding end 62a of the outer frame wire 60 (a state shown by imaginary lines), and the base end of the overhang L is the side end of the base frame 20. In order to engage with the edge 22a, the projecting portion L can be configured as a spring that can be resiliently displaced further below the fulcrum with the side edge 22a as a fulcrum. In addition, since the felt material 80 is attached to the side edge 22a of the base frame 20 with which the base end side of the overhang portion L is engaged, there is no noise in which the metals collide with each other.

As shown in FIG. 4, the formed wire 40
The side end of the base frame 20 has a side edge 22a of the base frame 20 that is engaged when the extending portion L is displaced downward, in addition to the elastic deformation by the elastic portion 43 which essentially functions as a spring. As the fulcrum, the extension L can be resiliently displaced further downward, so that a large deflection difference can be secured.

As a result, the cushioning property of the pad side portion held by the side end side of the formed wire 40 is enhanced, and the seating feeling is improved. In addition, the pad side portion becomes large when getting on and off from the side of the vehicle seat. The operation of placing and removing the foot on the pad from the side of the seat for bending is easy, and the getting on and off property is improved.

[0034]

According to the spring structure for a seat according to the present invention, a support receiving portion which is developed in both sides and on which a pad is placed,
Since a plurality of formed wires having a resilient portion serving as a spring and a lower fixing portion fixed to the base frame are arranged in parallel at predetermined intervals before and after between the base frame and the outer frame wire, Without using a conical coil spring, etc., the number of parts and the number of assembly steps can be reduced to reduce costs, and a sufficient spring feeling can be obtained only with a formed wire, making it possible to reduce Optimum cushioning can be provided.

In particular, the side end of the formed wire extending laterally from the side edge of the base frame is defined as an overhang, and the base engages when the overhang is displaced downward under a load. Since the spring is configured so that it can be resiliently displaced downward with the side edge of the frame as a fulcrum, a large difference in deflection can be ensured while maintaining the rigidity of the side end of the formed wire. As a result, the cushioning property of the pad side portion held by the side end side of the formed wire is enhanced, and the seating feeling is improved, and the pad side portion is largely bent when getting on and off from the side of the seat, so that the seat side is bent. It is easier to put your foot on the pad and remove it,
Getting on and off is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a spring structure for a seat according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of a spring structure for a seat according to one embodiment of the present invention.

FIG. 3 is a front view showing a protruding portion of a formed wire disposed second from the foremost end of the seat spring structure according to the embodiment of the present invention.

FIG. 4 is an operation explanatory view showing a state in which a protruding portion of a formed wire disposed second from the foremost end constituting the spring structure for a seat according to one embodiment of the present invention is downwardly deformed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Seat spring structure 20 ... Base frame 30, 40, 50 ... Formed wire 31, 41, 51 ... Support receiving part 32, 42, 52 ... Upper fixing part 33, 43, 53 ... Resilient part 34, 43 , 53 ... Lower fixing part L ... Overhang part 60 ... Outer frame wire

Claims (1)

(57) [Claims] 1. A frame-shaped base frame to be mounted on a seat, an outer frame wire spaced apart above the base frame, and a formed wire interposed between the base frame and the outer frame wire. Wherein the outer frame wire is formed by bending a wire, and has a width at least at a front portion which is larger than a width in both sides of the base frame; The wire is formed by bending a wire, and is developed in both directions along the surface surrounded by the outer frame wire, and a support receiving portion on which a pad is placed, and the outer frame wire is overlapped from both ends of the support receiving portion. An upper fixing portion that extends and is fixed to the outer frame wire, and is bent obliquely downward from the upper fixing portion toward the inside of the outer frame wire, and then bent again at a substantially intermediate position between the outer frame wire and the base frame. Extend parallel to the upper fixing part. A resilient portion that is further bent and extends obliquely downward toward the outside of the outer frame wire; and a lower fixing portion connected to the lower end of the resilient portion and fixed to the base frame. From the front end side to the rear end side with respect to the frame wire, a plurality of the formed wires are juxtaposed at a predetermined interval, and the upper fixed portion of the formed wire arranged on the front end side of the base wire of the base frame located below. The outer wire is fixed to a side end of the outer frame wire in a state of extending from the side edge to the side, and a side end including the upper fixing portion of the extended formed wire is set as an overhang portion, and the overhang is formed. The portion is configured as a spring that can be resiliently displaced further below the fulcrum, with the side edge of the base frame with which the base end side engages when displaced downward under a load as a fulcrum. And a spring structure for a seat.