JPS6333561Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a seat, and particularly to the structure of a thigh support that supports the thigh region of a person when seated.

2. Description of the Related Art Conventionally, seat frames for automobile seats are made of metal materials such as steel to improve the impact resistance of the seat. In such a metal seat frame, if the thigh support member that supports the thigh part of the occupant is integrally formed with the seat frame, the rigidity of the thigh support member increases and it becomes impossible to elastically support the thigh part.
Conventionally, the part of the cushion pad that is attached to the seat frame corresponding to the thigh part is appropriately impregnated with plastic to form the thigh support part, giving it the appropriate rigidity and elasticity to support the thigh part. Ta.

However, in such a thigh support structure,
The cushion pad had to be impregnated with plastic, which increased the number of man-hours and left room for improvement in terms of support stability.

By the way, it is known, for example, from Japanese Utility Model Publication No. 47-35042, that the bottom frame of a seat for an automobile or the like is made of plastic in order to reduce its weight.

The present invention was developed in view of the above-mentioned problems, and the bottom frame of the seat is made of plastic such as FRP (fiber-reinforced synthetic resin) or FRTP (fiber-reinforced thermoplastic synthetic resin) as an integral molded product. During molding, a flexible thigh support member is formed at the lower end of the front edge of the bottom frame, and a flexible thigh support member that stands diagonally forward in continuation with this and has a thigh seat on its upper edge is formed. The thigh support member is formed integrally with the plastic sheet bottom frame by cutting out both ends of the thigh support member, and the front part of the cushion pad is placed on the thigh support member. The purpose is to provide a thigh support structure that can provide comfortable and stable support.

Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments.

In FIG. 1, reference numeral 1 connects a seat bottom 2 and a seat bag 4 with a headrest 3 attached thereto by a connecting fitting such as a reclining knuckle 5 having a well-known structure.
This is an automobile seat whose position can be adjusted in the longitudinal direction by a slider mechanism 6 attached to the bottom surface of the seat in the longitudinal direction.

The seat bottom 2 has a cushion pad 8 mounted on a seat bottom frame 7 formed by stamping and pressing a plastic plate material such as FRP or FRTP, and a thigh support member 9 is mounted on the front part of the seat bottom frame 7. It is formed in one piece.

As shown in FIG. 2, the seat bottom frame 7 includes a pad support portion 10 that supports the cushion pad 8 with a certain elasticity, and a rear edge portion 10b to a front wall portion 10f on both sides of the pad support portion 10.
It consists of left and right side walls 11, 11 formed over the pad support portion 10, and the thigh support member 9 formed continuously in front of the front wall portion 10f of the pad support portion 10.

The pad support section 10 has a wall surface that is appropriately curved in the front-back direction from the upper part of the front wall section 10f to the rear edge section 10b, and has cutout grooves 13, . . . , in the front-back direction.
13 at appropriate intervals in the width direction, and each band-shaped divided portion 14, ..., 14 divided by the notch grooves 13, ..., 13 is divided at appropriate intervals in the front and rear direction. A recessed portion 15,...,1 having a substantially semicircular cross section.
5 is provided to provide each strip-shaped divided portion 14 with necessary support strength and elasticity.

In addition, the thigh support member 9 has side walls 11 and 11 in order to provide necessary elasticity or flexibility.
It is separated from the side walls 11, 11 by a notch 16 cut downward between the front wall 10f, and as shown in FIG. 9a, and a rhinoceros seat 9b that extends forward by an appropriate width and extends approximately horizontally from the upper edge of the inclined wall 9a.

Therefore, the thigh support member 9 can stably support the thigh portion of the occupant by the seat portion 9b via the front edge portion of the cushion pad 8, and can also support the elasticity of the inclined wall 9a supporting the seat portion 9b. Alternatively, the flexibility allows the thigh portion to be supported with appropriate cushioning properties.

Note that in order to further improve the elasticity of the thigh support member 9, the notch groove 1 of the pad support portion 10 must be
3, . . . , 13 may be appropriately divided in the width direction using notch grooves (not shown).

Further, in the above embodiment, the bottom wall of the seat bottom frame 7 is molded as it is to form the pad support part 1.
0 was formed, but the bottom wall was left as the bottom wall, and spring materials such as S-shaped springs were suspended between the left and right side walls rising from the bottom wall, and these spring materials formed a pad support part. You can. In this case, the thigh support member 9 may be formed continuously on the front edge of the bottom wall, and the front wall may or may not be formed.

As is clear from the above description, the present invention provides a plastic frame sheet that rises diagonally forward and continuous with the lower end of the front edge of the plastic sheet bottom frame on which the cushion pad is placed, and has a seat on the upper edge thereof. A flexible thigh support member is integrally provided, and both ends of the thigh support member are separated from the plastic seat bottom frame by cutouts, and the front part of the cushion pad is attached to the thigh support member. It provides a thigh support structure for the mounted plastic frame sheet.

According to the present invention, the thigh support member can be molded integrally with the plastic sheet frame, so
It is possible to improve productivity, stably support the edge part, and
The thigh support member itself is flexible in the vertical direction using the lower end of the front edge of the seat bottom frame as a fulcrum, so the thigh support member itself flexes appropriately due to the force acting on the thigh part, which causes the cushion pad to bend. Effects such as this can be obtained by making it relatively thin.

In addition, although the said Example demonstrated taking the example of a car seat, this invention is not limited to this, It goes without saying that it can be applied to a general seat.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view of a main part of an automobile seat using a plastic seat bottom frame according to the present invention, and FIG. 2 is a perspective view showing an example of the plastic seat bottom frame. 2...Seat bottom, 7...Plastic seat bottom frame, 8...Cushion pad, 9
... Sai support member, 9a... Slanted wall, 9b
...The seat of the rhinoceros, 16, 16...notch.

Claims (1)

[Scope of utility model registration request] In the plastic frame sheet, a flexible thigh support member is integrated with the lower end of the front edge of the plastic seat bottom frame on which the cushion pad is placed, rising diagonally forward and having a thigh seat on its upper edge. A thigh support structure of a plastic frame sheet, wherein the thigh support member is separated from the plastic sheet bottom frame by notches at both ends thereof, and the front part of the cushion pad is placed on the thigh support member.