JPH0713565Y2 - Seat device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a seat device for automatically adjusting the body pressure acting on a person sitting on a seat to be optimum.

<Prior Art> FIG. 2 shows a frame structure of a conventional automobile seat. As shown in the figure, a cushion main frame 2 and a backrest main frame 3 are provided on the slide rail 1. A seat cushion spring 4 (for example, an S-shaped spring) that supports the thigh, the ischium, and the coccyx is attached to the cushion main frame 2, and the backrest main frame 3 has a shoulder portion,
Seat back springs 5 (for example, S-shaped springs) that support the chest and the lumbar vertebrae are attached. Further, a lumbar (lumbar vertebra) support plate 6 is attached to the backrest main frame 3, and the lumbar support plate 6 is biased forward by a spring 7. The cushion main frame 2 and the backrest main frame 3 are a seat cushion pad (not shown) and a seat back cushion pad (not shown), respectively.
Is covered with.

<Problems to be Solved by the Invention> In the prior art shown in FIG. 2, since the lumbar support plate 6 is biased forward, the force concentrates on the lumbar region of the occupant and feels pain when sitting for a long time. Sometimes.

In view of the above-mentioned conventional technique, the present invention provides a seat structure that causes less fatigue even when sitting for a long time.

<Means for Solving the Problems> According to the present invention for solving the above problems, the backrest main frame is fixed to a portion supporting the occupant's chest with a soraic (thoracic vertebra) support plate and supports the occupant's waist. The point is to use a seat with a lumbar support plate adjustable so that body pressure is detected by a sensor and the lumbar support drive motor automatically changes the position of the lumbar support plate under the control of the controller. To do.

<Embodiment> FIG. 1 shows an embodiment of the present invention. As shown in FIG.
The seat 11 includes a cushion 12 and a backrest 13, and a cushion main frame 15 and a backrest main frame 16 are provided on a slide rail 14 of the seat 11. An isometric support plate 17 extending in the width direction of the cushion 12 is provided on the cushion main frame 15 at a substantially central portion of the cushion 12 in the front-rear direction, and the ischial support plate 17 supports the ischium portion. In addition, a seat cushion spring 18 for supporting the thigh and coccyx in front and back of the cushion main frame 15 with the ischial support plate 17 interposed therebetween.
(For example, S-shaped spring) is provided. A solar support plate 19 extending in the width direction of the backrest 13 is fixed to the backrest main frame 16 at a substantially central portion in the vertical direction of the backrest 13, and the solar support plate 19 supports the chest. A seat back spring 20 (for example, an S-shaped spring) that supports the shoulder is provided above the solaric support plate 19 of the backrest main frame 16.

Further, below the solaric support plate 19, a lumbar support plate 21 extending in the width direction of the backrest 13 is attached. The lumbar support plate 21 is connected to the lumbar support drive motor 22 via a link or a cam, and when the lumbar support drive motor 22 is driven, the lumbar support plate 21 is moved in the thickness direction of the backrest 13 and its position is adjusted. The lumbar support plate 21 supports the lumbar region.

The upper surface of the cushion main frame 15 and the front surface of the backrest main frame 16 are covered with a cushion pad 23. Inside the cushion pad 23, three body pressure pickup sensors 24, 25, 26 are incorporated. Among these, the chest body pressure pickup sensor 24 and the waist body pressure pickup sensor 25 in the backrest 13 detect the body pressure acting on the chest and the body pressure acting on the waist of the seated person. The seat pickup sensor 26 on the cushion 12 is
Detects whether a person is sitting at 11. The detection signals of these pickup sensors 24, 25, 26 are sent to the controller 27.

The controller 27 is connected to a switch unit 28 including an auto / manual switch 28a and a lumbar strength / weakness switch 28b, and a lumbar support drive motor 22.

The controller 27 presets the relationship between the body pressure acting on the chest and the body pressure acting on the waist when the backrest 13 can sit in the most comfortable state. The controller 27 is a body pressure pickup sensor.
The values of the detection signals from 24 and 25 are time-averaged to determine the pressure acting on the chest and waist.

In the seat device having such a configuration, when automatic control is selected by the auto / manual switch 28a of the switch unit 28, the controller 27 causes the lumbar support plate 21
Is adjusted. That is, the controller 27
First, the sheet 11 is detected by the signal from the sheet pickup sensor 27.
It is determined whether or not a person is sitting on the seat, and when the person is sitting, the signals from the body pressure pickup sensors 24 and 25 are received to determine the body pressure acting on the chest and the body pressure acting on the waist of the seated person. Then, the lumbar support drive motor 22 is operated to adjust the position of the lumbar support 21 so that the relationship between the body pressures of the two is optimized. In general, the body pressure in the chest is higher than the body pressure in the waist.

On the other hand, when manual control is selected with the auto / manual switch 28a, the lumbar support drive motor 22 operates according to the operation amount of the lumbar strength switch 28b, and the position of the lumbar support plate 21 can be adjusted.

<Effects of the Invention> According to the present invention as described in detail with reference to the above embodiments, the body pressure acting on the lower back is automatically adjusted so that the user can sit comfortably without fatigue.

[Brief description of drawings]

FIG. 1 is a partially broken perspective view showing an embodiment of the present invention, and FIG. 2 is a perspective view showing a frame structure of a conventional seat. In the drawing, 11 is a seat, 12 is a cushion, 13 is a backrest, 14 is a slide rail, 15 is a cushion main frame, 16 is a backrest main frame, 17 is an ischial support plate, 18 is a seat cushion spring, and 19 is a solar. Thick support plate, 20 is seat back spring, 21 is lumbar support plate, 22 is lumbar support drive motor, 23 is cushion pad, 24 is chest pressure pickup sensor, 25 is lumbar pressure pickup sensor, 26
Is a seat pickup sensor, 27 is a controller, 28 is a switch section, 28a is an auto / manual switch, and 28b is a lumbar strength / weakness switch.

Claims (1)

[Scope of utility model registration request] 1. A backrest main frame of a backrest, which is positioned at a height for supporting a torso of a seated person and fixed with a SOLARIC support plate, and at a height for supporting a waist of a seated person. The seat that has the lumbar support plate attached so that the position can be adjusted along the thickness direction of the backrest, the lumbar support drive motor that changes the position of the lumbar support plate by driving, and the backrest of the seat. A chest body pressure pickup sensor that is built in the part that supports the seated person's chest to detect the pressure that acts, and the pressure that is built in and acts on the backrest of the seat that supports the waist of the seated person. Lumbar body pressure pickup sensor to detect, chest body pressure pickup sensor and lumbar body pressure pickup sensor And a controller for adjusting the position of the lumbar support plate by driving the lumbar support drive motor so as to optimize the body pressure acting on the seated person by receiving the detection signals respectively detected by Seat device.