JP3142442B2 - Device for supporting cushion pad in vehicle seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supporting a cushion pad in a vehicle seat which can provide a comfortable feeling even when a thin cushion pad is used.

[0002]

2. Description of the Related Art To compensate for the lack of elasticity of a cushion pad, a seat spring material in the form of a surface spring is disposed in an opening of a cushion frame, and this is resiliently supported by a cushion frame with a tension spring. The pad support device is actually open flat 2-315.
No. 31, JP-A-62-42453, and the like.

However, in the conventional cushion pad supporting device of this kind of vehicle seat, a seat spring material is resiliently supported on a cushion frame by a number of tension springs on both sides thereof. The material is formed by extending a plurality of spring steel wires in the left-right direction between the rods on both sides of the rectangular frame material, so that there is no problem in terms of static sitting comfort, but dynamic sitting comfort, that is, vehicle A comfortable ride cannot be obtained against load fluctuations caused by the running vibration of the vehicle or irregular movement of the center of gravity of the human body. In addition, when seated, all spring steel wires stretched in the rectangular frame material in the left and right direction do not receive a uniform load, so the surface pressure increases.Thus, to obtain good cushioning properties, use a thick cushion pad. It had to be used. Further, there is a problem that a large number of tension springs are required to resiliently support the seat receiving spring material on the cushion frame, which increases the cost.

[0004]

SUMMARY OF THE INVENTION The present invention seeks to solve the above-mentioned conventional problems.
The cushion frame can be resiliently supported by a small tension spring to support the seat spring material, reducing costs. In addition, load fluctuation due to running vibration and irregular movement of the vehicle by uniformly generating surface pressure on the seat surface. It is stable against movement of the center of gravity and the position of the center of gravity, and of course there is no problem in terms of static sitting comfort, dynamic sitting comfort is good, and even if a thin cushion pad is used An attempt to provide a cushion pad support device for a vehicle seat having a good feeling of use has been developed by the present applicant and has been previously disclosed in Japanese Patent Application No. Hei 6 (1994) -64139.
Although the present invention is similar to the cushion pad support device of the vehicle seat filed as Japanese Patent Application No. 118430, the present invention takes into consideration the case where a large load is applied when traveling on a rough road or the like, and the seating is more dynamic than the prior application. A main object of the present invention is to improve comfort, and it is another object of the present invention to add a cushioning property to an upper limb of a seated person at the time of pedal operation and a side hold property at the time of curve running.

[0005]

SUMMARY OF THE INVENTION A cushion pad supporting device for a vehicle seat according to the present invention, which has been made to solve the above-mentioned problems, has a plurality of cushion pads provided inside a rectangular frame member having both required rigidity and elasticity. A seat spring member having a surface spring formed by stretching the spring steel wire in the front-rear direction is disposed in the opening of the cushion frame, and the seat spring member is rotatably mounted at one end on its front rod portion. The other end is connected to the front end of the cushion frame so as to be rotatable and can be rotated in the vertical direction, and both ends are connected to the rear rod portion of the seat spring and the rear end of the cushion frame. The seat spring member is elastically supported on the cushion frame by a plurality of tension springs for pulling the seat spring member backward.

[0006]

The cushion pad support device for a vehicle seat as described above can be used in a state where the cushion frame is mounted on the vehicle body and the cushion pad is mounted and supported on a surface spring. Although the surface spring of the spring material supplements and cushions the traveling vibration, it is the same as the conventional cushion pad support device in this kind of vehicle seat, but the surface spring is a rectangular frame material having the required rigidity and elasticity. A spring steel wire extending in the front-rear direction is arranged and formed. In addition, the seat spring material is attached to the cushion frame by turning the front rod portion of the square frame material of the surface spring vertically to the cushion frame. The rear link and the rear end of the cushion frame are connected at both ends by a linking member that can move. The cushion frame is resiliently supported by a plurality of tension springs that are pulled when the cushion pad is seated on the cushion pad. In addition to this, the rectangular frame material is pivoted downward at the rear part with the connecting member as a fulcrum, and at this time, the elasticity of both side rod parts having the required elasticity and the descending rear rod part to the cushion frame The elasticity of the tension spring, which is elastically supported, provides an excellent cushioning effect. In particular, the front end of the seat receiving spring material is not directly connected to the cushion frame, but one end is rotatably mounted on the front rod portion, and the other end is rotatably mounted on the front end of the cushion frame so that the front end can be vertically moved. Even when a heavy load is applied, such as when traveling on a rough road, the connecting member secures a vertical stroke that cannot be secured by the spring force of the square frame member, and the spring of the square frame member can be secured even when a large load is applied, such as when traveling on a rough road. Since the force acts effectively, there is no feeling of bottoming out, and dynamic sitting comfort is particularly good.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In the figure, 1 is a shallow bucket-shaped cushion frame, and 2 is an opening 11 at the upper end of the cushion frame 1.
The spring 20 is a seat spring member which is disposed inside the cushion frame 1 and the surface spring 20 is elastically supported by a connecting member 50 and a plurality of tension springs 4 to be described later on the cushion frame 1. The front and rear rod portions 22 and 23 are made of a hard steel wire having a circular cross section having a diameter selected in a range of 2 mm to 8 mm or a thick wire having both required rigidity and elasticity.
The front rod portion 22 of the square frame member 21 composed of
A plurality of, preferably five to eight, spring steel wires 25 are stretched between the rear rod portions 23 at intervals of 50 to 60 mm to form a surface spring 20, and a gate-shaped front frame spring is provided at the front of the surface spring 20. 3
0 with the leg ends of both legs 32, 32 obliquely upward from the side rods 24, 24 of the rectangular frame 21 so that the top rod 31 is located forward and higher than the front rod 22 of the surface spring 20. The side frame springs 40, 40, which are obliquely upwardly directed on both sides of the surface spring 20, have their front ends connected to both ends of the top rod portion 31 of the front frame spring 30. It is a continuous installation. 27 is each spring steel wire 2
5 is a horizontal core wire 27 such as a paper core connecting the intermediate portion as necessary. Even when the core wire 27 is used for a long time, the interval between the spring steel wires 25 is always constant. To be held.

Each of the square frame member 21, the front frame spring 30, and the side frame springs 40, 40 of the seat spring member 2 is made of a hard steel wire or a thick wire having both required rigidity and elasticity. When each of the rectangular frame member 21, the front frame spring 30, and the side frame springs 40, 40 is bent from a thick wire, each portion is formed by bending each of the thick wire members. Even if they are integrated by means such as welding at the position, some of the square frame material 21, the front frame spring 30, and the side frame springs 40, 40 are bent from the same thick wire material, and these are combined. They may be integrated at any position. Further, the front rod portion 22, the rear rod portion 23, and the side rod portion 24 of the rectangular frame member 21 may have different wire diameters. Further, in the above embodiment, the square frame rod 21, the front frame spring 30, and the side frame spring 40 are all made of hard steel wire having a circular cross section. However, a flat steel wire or a pipe having a rectangular cross section is bent. The material of the rectangular frame rod 21 such as a material may be a material having required rigidity and elasticity.

The seat spring member 2 is disposed in the opening 11 at the upper end of the cushion frame 1 and
The front rod portion 22 is held at the front edge of the opening of the cushion frame 1 via the connecting member 50, and the rear bar portion 23 is elastically supported at the front edge of the opening of the cushion frame 1 by a suitable number of tension springs 4. is there. Linking member 5
Reference numeral 0 denotes one which is rotatably mounted at one end to the front rod portion 22 of the seat receiving spring member 2 and rotatably mounted at the other end to the front end of the cushion frame 1 so as to be rotatable in the vertical direction. In the embodiment shown in FIGS. 1 to 3, the connecting member 50 is an elongated rectangular frame, and one of the linear shaft portions 51 is rotatable using the claw 12 cut and raised at the opening front edge of the cushion frame 1. At the same time, the other linear shaft portion 52 is rotatably mounted on the front rod portion 22 of the rectangular frame member 21 with the holding member 53 so that the connecting member 50 can be vertically rotated with one linear shaft portion 51 and Although the front rod portion 22 of the square frame member 21 is configured to be rotatable at a connection portion with the holding member 58, as in the other embodiment shown in FIG. To the nail 12 cut and raised at the opening front edge of the cushion frame 1 Linear axis 54 movably allowed to axially supported
At one time interval, each end of the strip is connected by means of welding or the like, and the other end of the strip is connected to the bearing 55
And the front rod portion 22 of the square frame member 21 is formed on the bearing portion 55.
6 can be rotatably supported, or as in another embodiment shown in FIG. 6, the pawl 12 cut and raised at the opening front edge of the cushion frame 1 using the connecting member 50 as a crankshaft.
So that one connecting shaft portion 56 is rotatably supported and the other connecting shaft portion 57 is rotatably supported by the holding member 58 with respect to the front rod portion 22 of the square frame member 21. Is also good. The number of the tension springs 4 is usually one for each of the right and left sides, but two for each.
In addition to the individual springs, three or more springs may be provided, such as one at the center for tuning the seating surface, and the spring strength of each tension spring 4 may be varied.

[0010] With the above structure, the cushion frame 1 is attached to the vehicle body, and the seat spring member 2 is provided.
The cushion pad is mounted and supported on the surface spring 20 such that the front end thereof is supported by the front frame spring 30 and both sides are located inside the side frame springs 40, 40, and this is used by covering with a seat cover. In this case, the seat spring member 2 has a surface spring 20 in which a plurality of spring steel wires 25 are stretched between the front rod portion 22 and the rear rod portion 23 of the square frame member 21 to support the cushion pad. Therefore, when sitting, the buttocks of the occupant are supported at the rear positions of all the spring steel wires 25 arranged in the front-rear direction, and the load is applied to all the spring steel wires 25.
, And the load is applied to a plurality of spring steel wires 2
5 and transmitted to each spring steel wire 25 is transmitted to the front rod portion 22 and the rear rod portion 23. And this front rod part 2
2 and the force transmitted to the rear rod portion 23 holds the front rod portion 22 of the rectangular frame member 21 rotatably in the vertical direction with respect to the front edge of the opening of the cushion frame 1 via the connecting member 50 as described above. Further, the rear rod portion 23 of the rectangular frame member 21 is resiliently supported by the cushion frame 1 with the tension spring 4 so that the surface pressure is applied to the surface spring 20 in a state where the surface pressure is equalized. The elasticity of the line 25,
The elasticity of the rods 24, 24 on both sides of the rectangular frame member 21 and the elastic force of the tension spring 4 cause the cushioning. A comfortable ride can be obtained without a feeling of stiffness.

That is, when seated, as shown in FIG. 2, each spring steel wire 25 is bent downward to exhibit a predetermined elasticity. In combination with the action of, it bends obliquely forward in a bow shape. At this time, the both-side rod portions 24, 24 work to prevent the rear rod portion 23 from bending excessively in an arcuate shape, so that the seating surface is formed in a bowl shape with good stability. . When traveling in this seated state, traveling vibration is generated and the load of the occupant changes vertically, front and rear, and left and right. However, when the vertical movement is applied to the surface spring 20, the front rod portion 22 is moved to the cushion frame. 1 is held rotatably in the up-down direction via the connecting member 50 with respect to the front edge of the opening of the first opening, and when the connecting member 50 is normally seated, as shown by a two-dot chain line in FIG. 4
When the maximum load is further applied, the connecting member 50 is connected to the claw 12 as shown by the one-dot chain line.
, The load is relieved while maintaining a balance with the tension spring 4 so that a comfortable cushion effect is always obtained in any case. Further, even when a force is applied to the seat spring member 2 when the occupant's center of gravity moves left and right, the side rods 24, 24 work as described above to work to correct the seating surface. The force for returning to the normal position always acts on the seat receiving spring member 2, so that an extremely stable seating posture can be obtained. Further, even when the occupant's center of gravity moves back and forth, the front rod portion 22 is held by the connecting member 50 so as to be able to rotate in the vertical direction with the front edge of the opening of the cushion frame 1 so that the front and rear portions can move forward and backward. Is the connecting member 50
Therefore, a comfortable ride can be obtained with little change in the seating surface.

As described above, the surface spring 20 in which a plurality of spring steel wires 25 are stretched in the front-rear direction in the rectangular frame member 21 is different from the case where the spring steel wires are stretched in the left-right direction. Since the load is distributed to the surface spring, the surface pressure is equalized, and therefore, even if the cushion pad mounted on the surface spring 20 is reduced in thickness, a sufficient cushioning effect can be obtained. 2 is a linking member 50 having one end rotatably mounted on the front rod portion 22 of the rectangular frame member 21 and the other end rotatably mounted on the front end of the cushion frame 1 so as to be vertically rotatable; Both ends are connected to the rear rod portion 23 of the seat spring member 2 and the rear end of the cushion frame 1, and the cushion frame 1 is elastically supported by a plurality of tension springs 4 that constantly pull the seat spring member 2 backward. Move back and forth, left and right is restricted by the presence of, it is possible to obtain a comfortable ride less the change of the seat surface relative to the dynamic variations during running,
Further, since the support by the tension spring 4 is performed only on the rear rod portion 23 of the square frame member 21, the number of the used tension springs 4 is reduced, so that not only the parts cost can be reduced but also the number of mounting steps can be simplified. There is also a great advantage in cost reduction.

Further, instead of directly fixing or pivoting the connection between the front end of the seat spring member 2 and the cushion frame 1, one end is rotatably attached to the front rod portion 22 and the other end of the cushion frame 1 is provided. The connection through the connecting member 50 that is rotatably attached to the front end and that can rotate in the vertical direction allows the connecting member 50 to be connected to the square frame member 21 even when a large load is applied when traveling on a rough road or the like. The upper and lower strokes that cannot be secured by the spring force described above can be secured. Therefore, the spring force of the square frame member 21 effectively acts, so that there is no feeling of bottoming and dynamic sitting comfort is particularly good.

Moreover, the front end of the cushion pad mounted on the surface spring 20 is extended to the front portion of the surface spring 20 so that the top rod portion 31 is positioned higher than the front rod portion 22 of the rectangular frame member 21. When the driver sits down and operates the pedal, the front end of the cushion pad is moved by the upper limb when the driver sits down and operates the pedal. Even if pushed down, the restoring force of the front frame spring 30 exerts an appropriate cushioning property, and the discomfort experienced when operating the pedal is eliminated.

In the same manner as in the embodiment, the side frame springs 40, 40 are provided on both sides of the plane spring 20 in a diagonally upward direction. The side frame springs 40, 40 allow the occupant to pass through a cushion pad. Will be supported from both sides,
It is possible to secure the side holding property when traveling on a curve. In particular, if the front ends of the side frame springs 40, 40 are connected to the front frame spring 30, the spring force of the front frame spring 30 is increased. Is strengthened by the side frame springs 40, 40, and the spring force of the side frame springs 40, 40 is also enhanced by the front frame spring 30, which is more preferable.

[0016]

As is apparent from the above description, the present invention provides a cushion frame in which a seat spring material having a surface spring in which a spring steel wire is stretched in the front-rear direction is disposed in an opening of a cushion frame. The front end is held via a linking member that can rotate in the vertical direction, and the rear end is resiliently supported via a tension spring. Even if a cushion pad is used, a good feeling can be obtained, and the cushion frame can be elastically supported by a slight tension spring so that the cushion spring can be provided at a low cost. The connection between the front end and the cushion frame is not simply fixed or pivoted, but a rotatable connecting member is interposed between Even if heavy, the connecting member secures a vertical stroke that cannot be secured by the spring force of the square frame material, and the spring force of the square frame material works effectively, so there is no feeling of bottoming, especially dynamic sitting comfort A good point is a great feature of the present invention.

[0017] Further, a gate-shaped front frame spring is provided at the front of the surface spring so that its top rod is positioned higher than the front rod of the square frame material. Even if the front end of the pad is pressed down by the upper limb, this front frame spring exerts an appropriate cushioning property and can eliminate the uncomfortable feeling received when operating the pedal. Since the side frame springs support the occupant from both sides via cushion pads, it is possible to secure the side holdability when traveling on curves, such as load fluctuations and center of gravity due to vehicle vibration and irregular movement. It becomes stable against the movement of. Therefore, the present invention eliminates the problems of the prior art, has no problem in terms of static sitting comfort, has good dynamic sitting comfort, and can be used even when a thin cushion pad is used. There is a great deal of contribution to industrial development as a cushion pad support device for a vehicle seat with a good feeling.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view showing a state before and after seating of a seat receiving spring according to the embodiment of the present invention.

FIG. 3 is a perspective view showing another embodiment of the seat receiving spring member to which the tension spring of the present invention is attached.

FIG. 4 is a perspective view showing another embodiment of the seat spring material to which the tension spring of the present invention is attached.

FIG. 5 is a perspective view showing another embodiment of the connecting member according to the present invention.

FIG. 6 is a perspective view showing another embodiment of the connecting member according to the present invention.

FIG. 7 is a schematic explanatory view of the present invention showing the relationship between the surface spring, the connecting member, and the tension spring when not in use, when sitting, and when maximum load is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cushion frame 2 Seat receiving spring material 11 Opening 20 Surface spring 21 Square frame material 22 Front rod part 23 Rear rod part 24 Side rod part 25 Spring steel wire 30 Front frame spring 31 Top rod part 40 Side frame spring 50 articulated Element

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 56-36261 (JP, U) Japanese Utility Model Showa 56-36264 (JP, U) Japanese Utility Model Showa 55-152155 (JP, U) Japanese Utility Model Hei 2 31533 (JP, U) Japanese Utility Model Showa 62-2649 (JP, U) Japanese Patent Publication No. 55-9203 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47C 7/02 A47C 7 / 14 A47C 7/28 A47C 7/32 A47C 7/34 A47C 7/35

Claims (4)

(57) [Claims] 1. A seat having a surface spring (20) formed by extending a plurality of spring steel wires (25) in the front-rear direction inside a rectangular frame member (21) having both required rigidity and elasticity. Spring material (2)
Is disposed in the opening (11) of the cushion frame (1), and this seat receiving spring material (2) is rotatably mounted at one end to the front rod (22) and the other end is mounted on the cushion frame (1). Linking member that is rotatably attached to the front end of the camera and that can rotate in the vertical direction
(50), and both ends are connected to the rear rod (23) of the seat spring material (2) and the rear end of the cushion frame (1) so that the seat spring material (2)
A cushion pad supporting device for a vehicle seat, characterized in that a plurality of tension springs (4) for pulling rearward are used to resiliently support the cushion frame (1). 2. A seat spring material (2) is provided with a gate-shaped front frame spring (30) at the front part of a plane spring (20) and a top rod part (31) in front of a square frame material (21). The cushion pad support device for a vehicle seat according to claim 1, wherein the device is extended so as to be positioned higher than the rod portion (22). 3. The seat receiving spring member (2) is provided with side frame springs (40), (40) which are inclined obliquely upward on both sides of a surface spring (20). Cushion pad support device for vehicle seats. 4. The support device for a cushion pad in a vehicle seat according to claim 3, wherein the front ends of the side frame springs (40) are connected to the front frame springs (30).