JPH0810094A - Spring structural body for seat - Google Patents

Abstract

PURPOSE:To provide a spring structural body for seat, which can easily give the optimal cushioning performance to required parts from the view of comfortable feeling of get-on in response to the desirable body pressure distribution on a pad so as to improve the seating feeling and which can reduce the thickness of a seat cushion so as to save the space. CONSTITUTION:This spring structural body 11 for seat is provided with a plate member 20 provided with a receiver surface part 20a, on which a pad 50 is to be placed, and plural spring members formed by meanderingly bending a narrow flat plate in a zigzag shape. Each fitting part 28 is formed at the predetermined plural positions of the lower surface of the plate member 20 in response to the desirable body pressure distribution on the pad 50, and the upper end of each spring member 30 is locked with each fitting part 28, and the lower end of each spring member 30 is fixed to the frame 40 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring structure for a seat, which is interposed between a frame forming the lowermost portion of a seat cushion and a pad arranged above the frame to give the pad a desired cushioning property. , Mainly used for vehicle seats.

[0002]

2. Description of the Related Art As a conventional seat spring structure of this type and its related art, there is a seat cushion for a vehicle seat as shown in FIGS. 11 and 12, for example. What is shown in FIG. 11 is a full-form type seat cushion 1 that does not use any seat spring made by processing a steel wire or the like. That is, the pad 3 having a predetermined shape is integrally formed directly on the bowl-shaped frame 2, and in the seat cushion 1 of this type, the pad 3 itself is also required to have a spring action. Therefore, the pad 3 is made of a highly elastic foam material.

Further, FIG. 12 shows a frame 5 forming the lowermost portion of the seat cushion 4 and a pad 7 above it.
, And a plurality of dedicated type formed wires 6, 6 ... That is, the pad 7 is supported by the plurality of formed wires 6, 6 ...

[0004]

However, as shown in FIG.
In the prior art shown in (1), the front surface side of the seat cushion 1 is also made of a highly elastic foam material, and the entire surface has a substantially uniform feel to some extent. Therefore, it is not possible to give a soft feeling to the buttocks of the seated person, and it is difficult to appropriately adjust to a body pressure distribution with a good seating feeling, and the cushioning property may be lacking and the seating feeling may be impaired. However, there has been a strong demand for further improvement in ride comfort performance.

Further, one of the important dynamic performances of the seat is a buffering function of vehicle vibration, and it is necessary to properly set the vibration characteristics of the seat so as not to match the resonance point of the vehicle. . However, in the full-form type,
Since it is difficult to lower the resonance frequency of the seat cushion 1, it is more difficult to improve the riding comfort performance.

Further, in the prior art shown in FIG. 12, the pitch of the formed wires 6, 6 ... Can be freely set to give optimum cushioning to a portion required for riding comfort. It is generally difficult to keep the height (length in the vertical direction) of the formed wires 6, 6 ... Low while maintaining the strength and elasticity of the structure. Therefore, it is difficult to reduce the thickness of the seat cushion 4, and there is a problem that a large installation space for arranging the seat is required.

The present invention has been made by paying attention to the problems of the prior art as described above, and it is possible to easily provide an optimum cushioning property to a portion required for riding comfort according to a desired body pressure distribution on the pad. Provided is a spring structure for a seat, which can be held, can further improve the seating feeling, can be made thinner in the seat cushion, and can meet the request for space saving. The purpose is to do.

[0008]

The gist of the present invention for achieving the above object is to provide a frame (40) which is the lowermost portion of the seat cushion (10) and a pad (50) arranged above the frame (40). In the spring structure for a seat (11) which is interposed between the pad (50) and has a desired cushioning property, the plate member (20a) on which the pad (50) is mounted is provided. 20),
A plurality of spring members formed by bending a narrow flat plate in a meandering shape, and predetermined on the lower surface side of the plate member (20) according to a desired body pressure distribution on the pad (50). Mounting portions (28) are formed at a plurality of positions, and the upper end portion (3) of each spring member (30) is formed on each mounting portion (28).
1) The seat spring structure (11) is characterized in that the spring structure (11) is configured such that the lower end portion (34) of each spring member (30) is fixed to the frame (40) side.

[0009]

The plate member (20) has a receiving surface portion (20a) on which the pad (50) is placed, and the receiving surface portion (20a) planarly supports the pad (50) near the buttocks of the seated person. receive. The plate member (20) may be molded into a predetermined shape, for example, with a synthetic resin or the like so that a good body pressure distribution can be obtained.

The plate member (20) is supported above the frame (40) with a cushioning property by a plurality of spring members (30). Each spring member (30) is formed by bending a narrow flat plate in a meandering shape, and its bending pitch, bending shape, and the like can be freely set, so that an arbitrary spring constant can be appropriately set.

Mounting portions (28) are formed at a predetermined plurality of locations on the lower surface side of the plate member (20). The locations of the mounting portions (28) and the number and orientation thereof are on the pad (50). It is set according to the desired body pressure distribution in.
Then, each spring member (30) is attached to each mounting portion (28).
The upper end (31) of the spring member (30) is fixed, and the lower end (34) of each spring member (30) is fixed to the frame (40) side.

That is, by arbitrarily setting the mounting portions (28), the mounting number and position of each spring member (30) can be controlled, whereby the seat spring structure (11) can be controlled. The body pressure distribution can be adjusted in advance so that an optimal sitting feeling can be obtained, and the riding comfort can be further improved.

Since the spring member (30) is formed by bending a narrow flat plate in a meandering shape and has strength and resilience as compared with a formed wire formed by processing a wire rod, a predetermined spring is used. It is possible to suppress the height that is bulky in the vertical direction while ensuring the feeling (spring strength). Therefore, the seat cushion (10) can be made thin.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 6 show an embodiment of the present invention. As shown in FIGS. 1 and 2, the seat spring structure 11 constitutes a part of a seat cushion 10 of a vehicle seat, and a frame 4 forming the lowermost portion of the seat cushion 10.
The pad 50 is interposed between the pad 0 and the pad 50 arranged above the pad 0 to give the pad 50 a desired cushioning property.
More specifically, the seat spring structure 11 is mounted between the pan frame 40, the plate member 20 spaced apart from the upper half of the pan frame 40, and the pan frame 40 and the plate member 20. And a plurality of spring members 30, 30 ...

As shown in FIG. 3, the plate member 20 is
The pad 50 near the buttocks of the seated person is supported so as to be supported planarly, and is integrally formed of synthetic resin in the shape shown so that a good body pressure distribution can be obtained. The plate member 20 includes a thin plate-shaped front end portion 21, both side end portions 22, 2
2, a rear end portion 23, and a pair of bridging portions 24, 25 extending in both directions between the both end portions 22, 22. And
The upper surface side of each of the front end portion 21, the side end portions 22 and 22, the rear end portion 23, and the pair of bridge portions 24 and 25 serves as a receiving surface portion 20a on which the pad 50 is placed. In addition, the front end portion 21 and the rear end portion 2
3, a pair of reinforcing ribs 26 extending in the front-rear direction,
26 are bridged over integrally.

The plate member 20 is supported above the frame 40 by a plurality of spring members 30 with cushioning properties. Mounting portions 28, 28 ... For fixing an upper end portion 31 of a spring member 30, which will be described later, are formed on the lower surface side of the plate member 20. Such mounting part 2
8 are formed at a plurality of predetermined locations and orientations shown in FIGS. 2 and 3 according to the desired body pressure distribution on the pad 50. That is, on the lower side surface of the front end portion 21,
Three attachment parts 28 are formed at equal intervals in both sides, and similarly, three attachment parts 28 are formed at equal intervals in both sides on the lower side surfaces of the pair of bridge portions 24, 25.

As shown in FIG. 4, each mounting portion 28 has a cap shape into which the upper end portion 31 of the spring member 30 is fitted, and the opening portions of the caps are unified so as to face the front-rear direction. Further, on the upper part of each mounting portion 28, the projections 3 projecting from the upper end of the spring member 30 are provided.
Locking holes 29, 29 into which the 5, 35 are fitted are formed. As shown in FIG. 1, so as to correspond to the plurality of mounting portions 28 of the plate member 20, ...
2 ... is formed.

As shown in FIGS. 5 and 6, the spring member 30
Is formed by bending a narrow flat plate in a meandering shape. Specifically, it is bent into an S shape as shown in the drawing, and has an upper end portion 31, an intermediate portion 33, a lower end portion 34, and upper and lower end portions 3
1, 34 and the loop portions 32 and 32 that connect between both ends of the intermediate portion 33, respectively. Further, on the upper surface side of the upper end portion 31, when the fitting portion 28 of the plate member 20 described above is fitted, the projections 35, which fit into the locking holes 29, 29,
35 are provided. On the upper surface side of the lower end portion 34, projections 35, 35 are similarly provided so as to project. As in the spring member 30A according to the modified example shown in FIG. 7, the upper and lower end portions 31, 34 are provided with the locking holes 36 instead of the protrusions 35, while the engaging members 28 are attached to the mounting portion 28 side of the plate member 20. Stop hole 28
Instead, a mode in which a protrusion is provided may be used.

Next, the operation will be described. As shown in Figure 1,
The upper ends 31 of the spring members 30 are fitted and fixed to the mounting portions 28, 28 of the plate member 20 in the same direction, and the lower ends 34 of the spring members 30 are mounted to the frame 40, respectively. The parts 42, 42 ... Are fitted and fixed. The upper surface side of the plate member 20 assembled in this way forms a receiving surface portion 20a, and the receiving surface portion 20a
The pad 50 may be mounted so as to be placed on it.

By the receiving surface portion 20a of the plate member 20,
The pad 50 in the vicinity of the buttocks of the seated person can be received face-to-face, but the plate member 20 is a resin molded product, and the receiving surface 20a thereof can bend to some extent along the seated buttocks. By devising its shape,
The plate member 20 itself can also have cushioning properties. The plate member 20 is supported by the plurality of spring members 30 above the frame 40 with sufficient cushioning properties.

Each spring member 30 is formed by bending a narrow flat plate in a meandering shape. The thickness and width of the narrow flat plate can be appropriately selected, and the bending pitch and bending shape can be freely set. Therefore, the spring constant can be appropriately set. For example,
FIG. 8 shows a spring member 30B according to a modified example. Like the W-shaped spring member 30B, the spring member 30
If the number of bending of the narrow flat plate is increased and the number of the intermediate portion 33 and the loop portion 33 is increased one by one, the repulsive force can be further increased.

Further, the mounting portions 28 are formed on the lower surface side of the plate member 20 at a predetermined number of locations. The location of the mounting portions 28 and the number and direction thereof are the pads 50.
It may be appropriately set according to the desired body pressure distribution above. That is, by arbitrarily setting each mounting portion 28, it is possible to easily control the number of mounted spring members 30 and the positions thereof.

Thus, even if the spring constant of the spring member 30 itself is not changed, the body pressure distribution with respect to the pad 50 on the receiving surface portion 20a of the plate member 20 can be adjusted in advance so as to obtain an optimal seating feeling, and the riding comfort can be improved. Can be further improved. For example, as shown in FIGS. 9 and 10, the seat spring structure 11 according to the above-described embodiment can be obtained by simply changing the position, the number, or the orientation of the mounting portions 28 provided on the lower surface side of the plate members 20A and 20B. A completely different body pressure distribution can be obtained.

As described above, according to the seat spring structure 10 of the present invention, it is easy to appropriately adjust the body pressure distribution to provide a comfortable seating feeling, and the ride comfort can be adjusted according to the desired body pressure distribution. The seating feeling can be further improved by, for example, providing an optimal cushioning property to a necessary portion. In addition, one of the important dynamic performances of the seat is the cushioning effect of the vehicle vibration, but it is also possible to set the vibration characteristics of the seat appropriately so that it does not match the resonance point of the vehicle. This is extremely easy in comparison.

Further, the spring member 30 is formed by bending a narrow flat plate in a meandering shape and has strength and resilience as compared with a formed wire material obtained by processing a wire material, so that a predetermined spring feeling is obtained. (Spring strength) can be ensured while suppressing the vertical height. Therefore, the seat cushion 10 can be made thinner than the conventional one in which a foamed wire is incorporated, and it is possible to sufficiently meet the request for space saving.

Although the seat spring structure 11 according to the present embodiment constitutes the seat cushion 10 of a vehicle seat, the present invention is not limited to this, and other various types such as furniture sofas. May be used for seats. Also,
On the lower surface side of the plate member 20, the upper end portion 3 of the spring member 30 is provided.
Although the cap-shaped mounting portion 28 to which 1 is fitted is formed,
The shape of the mounting portion is not limited to that shown in the figure, and may be any form as long as the upper end portion of the spring member can be fixed.

[0027]

According to the seat spring structure of the present invention, the mounting portions for fixing the spring members are formed at a predetermined plurality of positions of the plate member. By arbitrarily setting in accordance with the desired body pressure distribution, it is possible to appropriately control the number of spring members attached, their positions, etc., and adjust the body pressure distribution on the pad in advance so as to obtain an optimal seating feeling, The riding comfort can be further improved.

Further, since the spring member is formed by bending a narrow flat plate in a meandering shape and has strength and resilience as compared with a formed wire or the like obtained by processing a wire rod, a predetermined spring feeling is secured. At the same time, it is possible to make the seat cushion thin by suppressing the height of the seat cushion in the vertical direction, and it is possible to sufficiently meet the request for space saving.

[Brief description of drawings]

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

FIG. 2 is a plan view showing a spring structure for a seat according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a plate member that constitutes a spring structure for a seat according to an embodiment of the present invention.

FIG. 4 is an enlarged perspective view showing an attachment portion of a plate member that constitutes a spring structure for a seat according to an embodiment of the present invention.

FIG. 5 is a perspective view showing a spring member that constitutes a spring structure for a seat according to an embodiment of the present invention.

FIG. 6 is a side view showing a spring member that constitutes a spring structure for a seat according to an embodiment of the present invention.

FIG. 7 is a side view showing a modified example of a spring member.

FIG. 8 is a side view showing another modification of the spring member.

FIG. 9 is a plan view showing a modified example of the seat spring structure.

FIG. 10 is a plan view showing another modification of the seat spring structure.

FIG. 11 is a cross-sectional view showing a conventional seat cushion.

FIG. 12 is a cross-sectional view showing another conventional seat cushion.

[Explanation of symbols]

 10 ... Spring structure for seat 20, 20A, 20B ... Plate member 28 ... Attachment part 30, 30A, 30B ... Spring member 31 ... Upper end 34 ... Lower end 40 ... Pan frame 50 ... Pad

Claims (1)

[Claims] 1. A spring structure for a seat, which is interposed between a frame forming the lowermost portion of a seat cushion and a pad arranged above the frame, and which provides the pad with a desired cushioning property. A plate member having a receiving surface portion to be placed, and a plurality of spring members formed by bending a narrow flat plate in a meandering shape, and the plate member according to a desired body pressure distribution on the pad. Mounting portions are formed at a plurality of predetermined positions on the lower surface side of each of the spring members, the upper end portions of the spring members are fixed to the mounting portions, and the lower end portions of the spring members are fixed to the frame side. A spring structure for a seat.