JP3401099B2 - Mounting structure of seating sensor in vehicle seat - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a vehicle seat (seat).
The present invention relates to a mounting structure for a seat of a seating sensor that detects whether or not a seated person is seated.

[0002]

2. Description of the Related Art Some automobile seats are equipped with a rotating seat or a seat belt that can be turned back and forth. When these seats are seated by a seated person, the rotating seat has a lock for restricting its rotation. The seating sensor detects whether or not the seatbelt is used, and whether or not the seatbelt is used by the seated person in the seat with the seatbelt.

The seating sensor is either embedded in a foam cushion forming a seat cushion or attached to a supporting member such as an S-shaped spring that supports the cushion. In the former one, which is embedded in the cushion body, after the cushion body is molded, it is manually embedded in the recessed notch formed in the cushion body at the time of molding.
The latter is bound to a support member separate from the cushion body by a hog ring or the like.

[0004]

The above-mentioned one embedded in the cushion body has poor workability because the seating sensor is buried after the cushion body is molded, and the seated person, which has been developed recently, is seated. It is difficult to embed a belt-shaped seating sensor that easily senses strain at the time. On the other hand, since the latter is attached to the support member located below the cushion body, it is separated from the seating surface, impairing the sensitivity, and also has the problem of poor attachment.

Therefore, an object of the present invention is to make it possible to easily and accurately attach a belt-shaped seating sensor, which can easily detect strain at the time of seating, to a seat.

[0006]

To achieve the above object, a seating sensor mounting structure for a vehicle seat according to the present invention has a frame-like insert formed by bending the seating sensor into a shape similar to the outer shape of the seat. A wire, two flexible wires that are installed in parallel with each other at a distance from the insert wire, a belt-shaped seating sensor stretched between the two flexible wires, and the insert A foam cushion body in which a wire, a flexible wire, and a seating sensor are integrally embedded inside during molding, and the flexible wire is provided with a bent portion for positioning the seating sensor. It is characterized by becoming.

[0007]

Since the belt-shaped seating sensor is hung on the bent portion for positioning the flexible wire, it does not move in the mold due to the pressure due to the injection of the foaming liquid for forming the cushion body, and the cushioning sensor does not move. It is positioned and embedded in a predetermined position in the body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, (1) is an insert wire, (2A) (2
B) is a flexible wire, (3) is a belt-shaped seating sensor, and (4) is a foam cushion body foam-molded by a mold.

The insert wire (1) has a wire diameter of 4 m.
A frame-shaped wire made of a steel wire of m to 5 mm, which is bent into a small-sized similar shape to the outer shape of the seat cushion. The insert wire (1) improves the shape retention of the cushion body (4). Is improving.

The flexible wires (2A) and (2B) are inserted into the insert wire (1) in the front-back direction of the seat cushion.
The diameter of the wire stretched in parallel on the left and right sides of 2mm to 2.6mm
Of the steel wire, and the bent portions (20), (20), etc. for positioning, which are bent inwardly in a U shape, are provided in one part thereof. And this flexible wire (2A) (2B)
The ends of each are connected to the insert wire (1) by clips (21) (21).

The seating sensor (3) includes bent portions (20) (20) ... of the left and right flexible wires (2A) (2B).
The seating sensor (3) has a strain gauge built in the belt, and when the seated person sits on the seat cushion, the seated sensor (3) senses the strain, and when the seated state continues, the seated state is detected. When the seated person separates from the seat cushion, the change in the strain is sensed,
It senses that you are not seated on the seat cushion.

The seating sensor (3) has a structure in which, for example, piezoelectric elements in the longitudinal direction are sandwiched between thin copper plates, and these are covered with a covering material. It changes electrically and senses it.

Insert wire (1) with flexible wires (2A) and (2B) on which the seating sensor (3) is stretched.
Is housed in a cushion body (4) for foam molding, and the cushion body (4) is foam-molded,
A seating sensor (3) and the like are integrally embedded in the cushion body (4), and a seat cushion is obtained by covering the cushion body (4) with a skin.

Thus, when the cushion body (4) is foam-molded by molding, the seating sensor (3) is fixed to the flexible wires (2A) and (2B). The seating sensor (3) does not move due to the pressure of the liquid.

When the seat cushion is seated, the flexible wires (2A) and (2B) integral with the cushion body (4) and the seating sensor (3) are also flexed at the same time as the cushion body (4), and the strain thereof is distorted. Is detected by the seating sensor (3).

The flexible wires (2A) (2
B) is a straight steel wire provided with a bent portion,
Instead of the flexible wires (2A) and (2B), spring materials such as S-shaped springs and tension coil springs may be used.

[0017]

The present invention uses a belt-shaped seating sensor which is easy to detect the strain of the seat.
Since it is stretched over a flexible wire that is integrated with the cushion body and has excellent flexibility, it is possible to provide a sensor with excellent sensitivity when sitting.

Further, since the belt-shaped seating sensor is stretched over the bending portion for positioning in the flexible wire, the belt-shaped seating sensor does not shift during foam molding of the cushion body, and the cushion does not move. It can be accurately embedded at a predetermined position on the body.

In addition, since the cushion wire can be integrally foam-molded by accommodating the insert wire with a flexible wire in which the seating sensor is stretched in the foam molding mold of the cushion body, the seating sensor can be easily attached. .

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line II-II in FIG.

[Explanation of symbols]

1 Insert wire 2A flexible wire 2B flexible wire 3 Belt-shaped seating sensor 4 cushion body 20 Bent portion provided on the flexible wire

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Ikeda 3-2-1 Matsubara-cho, Akishima-shi, Tokyo Inside Tachi-S Co., Ltd. (56) References: Kaihei 4-99039 (JP, U) -16550 (JP, U) Actual flat 6-16128 (JP, U) Actual flat 2-71400 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60N 2/00- 5/00

Claims (2)

(57) [Claims] 1. A frame-shaped insert wire bent in a shape similar to the outer shape of a sheet, and two flexible wires provided in parallel with each other at a distance from the insert wire. A belt-shaped seating sensor stretched over the two flexible wires, and a foam cushion body in which the insert wire, the flexible wire, and the seating sensor are integrally embedded inside during molding. A seating sensor mounting structure for a vehicle seat, characterized in that the flexible wire is provided with a bent portion for positioning the seating sensor. 2. The seating sensor mounting structure for a vehicle seat according to claim 1, wherein the seating sensor is a pressure-sensitive sensor that detects strain due to the weight of a seated person seated on the seat.