JPH0612693Y2 - Seat cushion structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to improvement of a cushion structure of a seat.

(Prior Art) Conventionally, as a cushion structure of a seat, as shown in FIG. 8, a mesh frame 3 is arranged in a central opening 2 of the cushion frame 1, and the mesh frame 3 is the cushion frame 1 described above. While being tensioned and supported by a large number of tension springs 4, ..., 4 locked between the cushion frame 5 and the cushion frame 1, the cushion pad 5 is loaded on the mesh frame 3 and the cushion frame 1 as shown in FIG. It is proposed that the surface of the cushion pad 5 is covered with a trim 6.

(Problems to be solved by the invention) By the way, when a seat slide slide screw 6, a slide nut 7, and the like are provided below the seat frame 1, the tension spring 4 may come into contact with the seat frame 1. 3 cannot be lowered downward, and therefore the thickness t'of the cushion pad 5 must be thinned, which causes a problem of poor cushioning property.

Further, when the user is not seated, only the spring force (tensile force) for pulling and supporting the reticulated frame 3 acts on the tension spring 4, and the spring force begins to act on the load of the seated person, so the initial deflection of the cushion Is good, but there is also a problem that the amount of deflection decreases as the load increases, a so-called bottom feeling occurs, and the feeling is bad.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a seat cushion structure having good cushioning properties and feeling.

(Means for Solving the Problem) Therefore, according to the present invention, the mesh frame is arranged in the central opening of the cushion frame, and the mesh frame is locked between the cushion frame and the diagonal frame and pulled obliquely downward. Cushion structure for a seat, which is held by a tension spring held by the above and is supported by being pulled upward, and a cushion pad is loaded on the mesh frame and the cushion frame, and the surface of the cushion pad is covered with trim. In the above, the cushion frame is provided with a projecting piece portion that descends downward at the peripheral edge of the central opening thereof, while the mesh frame is such that the tip portion is below the projecting piece portion of the cushion frame from the frame line that defines it. The silencer that extends and comes into contact with the protruding portion of the cushion frame It is characterized by having a protruding portion.

(Operation and effect of the invention) In the present invention, the protruding portion of the mesh frame is abutted against the protruding portion of the cushion frame, and the mesh frame is pulled downward to hold the tension spring in a state of being pulled obliquely downward. It was done like this.

Therefore, even if the cushion frame is not lowered, the mesh spring can be lowered because the tension springs are inclined, and the cushion pad can be made thicker, so that the cushioning property is improved.

In addition, the spring force (tensile force) acts in advance on the tension spring in combination with the increased thickness of the cushion pad, so that the initial deflection of the cushion is good and the protruding portion of the mesh frame uses its silencer. It is only in contact with the protrusion of the cushion frame, there is no restriction on the amount of downward movement of the mesh frame, and the tension spring acts as the load increases, so you can feel the deflection enough and the bottom Feeling is lost and feeling is improved.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the seat cushion 22
The cushion frame 10 is formed in a quadrangular frame shape, and a quadrangular central opening 11 is opened in the central portion thereof.

In the central opening 11 of the cushion frame 10, a square net-shaped frame 12 is arranged.

The mesh frame 12 includes a quadrangular frame line 13, side cords 14, ..., 14 stretched in the width direction at predetermined intervals in the longitudinal direction of the frame line 13, and the length of the frame line 13. And a center cord 15 that holds the space between the side cords 14 in a direction. The frame line 13 is formed by winding thin paper on the surface of the core material.
5 is formed by rolling thin paper.

, 10a are formed on both sides in the width direction of the cushion frame 10 at predetermined intervals in the longitudinal direction, and one end of the tension spring 16 is locked in each of the locking small holes 10a. At the same time, the other end of the tension spring 16 is locked to both ends of the frame line 13 of the mesh frame 12.

The tension spring 16 is set to such an extent that only a spring force (pulling force) for pulling and supporting the reticulated frame 12 in a horizontal state acts when it is assembled and when it is not seated.

Therefore, in this state, it is the same as the conventional technique shown in FIG.

On the other hand, projecting piece portions 10b, ..., 10b that fall downward are formed on the peripheral edge of the central opening 11 of the cushion frame 10.

At the front end and the rear end of the frame line 13 of the reticulated frame 12, as shown in FIG. 3 (a), a projecting portion (protruding wire) 13 a extending in the width direction wider than the width of the frame line 13, 13a
, And silencers 13b, 13b are attached to the tips of the protrusions 13a, 13a.

As shown in FIG. 3 (b), the projecting portion 13a may be integrally formed by projecting the frame line 13 in the middle of the frame line 13 in the longitudinal direction.

With the above configuration, the tension spring 16 may be locked between the cushion frame 10 and the net-like frame 12 by a spring force for pulling and supporting the net-like frame 12 at the time of assembling. Is easy.

Next, while moving the mesh frame 12 in the width direction, the mesh frame 12 is pressed down diagonally from above, and the silencer 13b of the projecting portion 13a of the frame line 13 is pushed under the projecting piece portion 10b of the cushion frame 10 to project the silencer 13b. Hold it against the piece 10b.

As a result, the mesh frame 12 is pulled down, and the tension spring 16 is held in a state of being pulled obliquely downward.

After that, the mesh frame 12 and the cushion frame 10
The seat cushion 22 is completed by stacking the cushion pad 20 on the seat and covering the surface of the cushion pad 20 with the trim 21.

Since the tension spring 16 is inclined, the mesh frame 12 can be lowered, and the thickness t of the cushion pad 20 can be reduced to the conventional thickness t '.
Since it can be made thicker, the cushioning property is improved.

Further, since the cushion pad 20 has a large thickness, the initial deflection of the cushion is good, and the spring force (tensile force) acts on the tension spring 16 in advance, so that the tension spring is increased as the load of the seated person increases. Since 16 acts, the seated person can fully feel the deflection, the feeling of bottoming is eliminated, and the feeling is good.

Since the silencer 13b of the protruding portion 13a is abutted against the protruding piece portion 10b of the cushion frame 10,
No abnormal noise from metal contact.

FIG. 4 shows an experimental example in which a load W of 100 kg is applied to the seat cushion 22, and as shown in FIG. 5, in the conventional one shown by the broken line b, the amount of deflection increases as the load W of the seated person increases. Since it decreases, there is a feeling of bottoming, but the solid line a
It can be seen that, in the case of the present invention shown by, the amount of deflection increases as the load of the seated person increases, so that the feeling of bottoming does not occur.

Although the tension spring 16 is stretched in the width direction (horizontally stretched) in the above embodiment, it can be stretched in the longitudinal direction (longitudinal stretch) as shown in FIGS. 6 and 7. In this case, the locking small holes 10a, ..., 10a are opened on both sides of the cushion frame 10 in the longitudinal direction, and the hook 23 is locked in the locking small hole 10a on the front side.
Is locked to the front end of the frame line 13 of the reticulated frame 12, while the tension spring 1 is inserted in the rear locking small hole 10a.
One end of the tension spring 16 is locked, and the other end of the tension spring 16 is locked to the rear end of the frame line 13 of the mesh hook 12.

Then, a projecting portion 13a is formed at the rear end of the frame line 13 of the mesh frame 12, and the projecting portion 13a is recessed below the projecting piece portion 10b of the cushion frame 10 to project the projecting piece portion 1.
When it is abutted against 0b, the rear portion of the mesh frame 12 is pulled down and the tension spring 16 is held in a state of being pulled obliquely downward.

Then, the thickness t of the rear portion of the cushion pad 20, that is, the portion where the load of the buttocks of the seated person acts can be increased.

[Brief description of drawings]

FIG. 1 is a perspective view of a cushion structure according to the present invention, FIG. 2 is a sectional view of an essential part of FIG. 1, FIG. 3 (a) is an enlarged view of an essential part of FIG. 1, and FIG. FIG. 4 is an explanatory view showing the outline of a load experiment, FIG. 5 is a graph showing the relationship between the load and the amount of deflection, and FIG. 6 is a cushion structure of another embodiment. FIG. 7 is a perspective view, FIG. 7 is a cross-sectional view of FIG. 6, FIG. 8 is a perspective view of a conventional cushion structure, and FIG. 9 is a cross-sectional view of an essential part of FIG. 10 ... Cushion frame, 10b ... Projection piece, 11
…… Central opening, 12 …… Mesh frame, 13 …… Frame line,
13a ... projection, 16 ... tension spring, 2
0 ... Cushion pad, 21 ... Trim, 22 ... Seat cushion.

Claims (1)

[Scope of utility model registration request] 1. A mesh frame is disposed in a central opening of a cushion frame, and the mesh frame is held by a tension spring which is locked between the cushion frame and the cushion frame and is pulled obliquely downward. In a cushion structure of a seat which is supported by being pulled upward, a cushion pad is loaded on the mesh frame and the cushion frame, and the surface of the cushion pad is covered with trim, the cushion frame has a central opening. The mesh frame is attached to the tip end while extending downward from the frame line that defines the protrusion part that extends downward to the periphery of the cushion frame. A silencer is provided with a protrusion that abuts against the protrusion of the cushion frame. Cushion structure.