JPH0555949U - Seat - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a seat in which the portion pressed by the lumbar support mechanism satisfactorily extends forward. [Structure] A recess 16 is formed in a cushioning material 11 around a pressed portion 4A pressed by a lumbar support mechanism, and an expandable portion 18 formed by integrating a support member 13 is provided along the recess 16.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an improved seat.

[0002]

[Prior Art]

 Figures 3 to 6 show a prior art seat with a so-called lumbar support mechanism. As shown in FIG. 3, the seat 1 is composed of a seat portion 2 and a backrest portion 3, and the backrest portion 3 is integrated with the cushioning material 4 and the back surface of the cushioning material 4 as shown in FIG. The support member 5 is formed.

The pressed portion 4A on the back surface of the cushioning member 4 pressed by the lumbar support mechanism is formed to be harder than other portions in order to have strength.

As shown in FIG. 5, the backrest 3 is arranged above the elastic wires 7, 7, ... Bridged to the frame 6.

The lumbar support mechanism 8 is provided on the frame 6, and its position corresponds to the waist of the seated person. The lumbar support mechanism 8 includes a pair of arms 9 and 9 provided on the frame 6 so as to be rotatable, and elastic wires 10, 10, ... bridged between the arms 9 and 9. And a rotating means (not shown) for rotating the arms 9 and 9 in the directions A and B shown by the arrows.

By operating the rotating means to rotate the arms 9, 9 in the direction of arrow A, the elastic members 10, 10, ... Push 4A forward. As a result, the part of the backrest 3 corresponding to the waist of the occupant pushes the waist as if it protrudes forward, and the occupant can take a comfortable driving posture.

The lumbar support mechanism 8 functions as a supporting device that applies a pressing force to the pressed portion 4A. The supporting device is composed of an air bag, and by injecting air into the air bag. Alternatively, a pressing force may be applied to the pressed portion 4A.

[0008]

[Problems to be solved by the device]

 However, the conventional technique has the following problems. That is, the support member 5 has low elasticity. Therefore, even if the pressed portion 4A is pressed by the elastic lines 10, 10, ..., The backrest part 3 cannot be projected forward as indicated by the chain line in FIG. However, there is a problem that the waist of the seated person cannot be pressed.

Therefore, the present invention has been made in view of the above situation, and an object thereof is to provide a seat in which the cushioning material can favorably project forward when pressed by the supporting device. Especially.

[0010]

[Means for Solving the Problems]

 In the seat according to the present invention, a recess is formed in the cushioning material around the pressed portion that is pressed by the support device, and an expandable portion is provided along the recess that is integrally formed with a support member.

[0011]

[Action]

 The support member expands and contracts in the expansion and contraction portion when the support device operates.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. The same components as those of the conventional technique are designated by the same reference numerals and the description thereof will be omitted. Reference numeral 11 denotes a cushioning material in the present invention. A circular recess 16 is formed on the back surface of the buffer material 11 around the pressed portion 4A. A support member 13 is provided on the back surface of the cushioning material 11 so as to extend along the recess 16, and is integrally foam-molded. The support member 13 serves as a stretchable portion 18 in the recess 16.

Next, the operation will be described with reference to FIG. When the backrest portion 3 is pressed forward by the elastic wires 10, 10, ..., As shown in the figure, the support member 13 in the expansion / contraction portion 18 extends through the recess 16 and, as a result, The backrest portion 3 projects forward as shown by the alternate long and short dash line and presses the waist of the seated person.

In the above embodiment, the elastic member 10 of the lumbar support mechanism pushes the backrest portion 3 forward, but an air bag is provided, and the backrest portion 3 is pushed forward by injecting air into the air bag. You may. There are various other means for pressing the backrest 3 forward.

[0015]

[Effect of the device]

 As described above, the seat according to the present invention is formed by forming a recess in the cushioning material around the pressed portion to be pressed by the supporting device, and providing an expandable portion formed by integrating the support member along the recess. Therefore, when the support member is pressed by the support device, the support member can be extended by the expansion and contraction portion, and thus the cushioning member can be pressed by the support device and can be favorably projected forward. Further, since the support member is integrally formed when the cushioning material is foam-formed, it is possible to provide a seat with excellent mass productivity.

[Brief description of drawings]

FIG. 1 is a rear perspective view of a backrest portion of a seat according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1 for explaining the operation.

FIG. 3 is a perspective view of a conventional seat.

FIG. 4 is a rear perspective view of a conventional backrest portion.

FIG. 5 is a schematic configuration diagram showing a conventional lumbar support mechanism.

FIG. 6 is a cross-sectional view illustrating the operation of a conventional lumbar support mechanism.

[Explanation of symbols]

 4A Pressed portion 6 Frame 7, 10 Elastic wire 8 Lumbar support mechanism (supporting device) 11 Cushioning material 13 Support member 16 Recessed portion 18 Stretchable portion

Claims (1)

[Scope of utility model registration request] 1. An elastic wire bridging the frame, a cushioning material positioned on the elastic wire, and a support member integrated with the back surface of the cushioning material, and the back surface of the cushioning material. In a seat provided with a support device that applies a pressing force to the pressed portion, a recess is formed in the cushioning material around the pressed portion, and an expansion and contraction portion formed by integrating a support member is provided along the recess. A seat characterized by being made.