JPH0332943A - Seat device for automobile - Google Patents

Abstract

PURPOSE:To improve holding characteristics for a crew member in a seat device equipped with an adjustment means for suiting a seat surface shape to the crew member's form by detecting a seat surface height in adjusting the seat surface shape, and vertically shifting a seat support part on the basis of the detected result. CONSTITUTION:When a crew member's seating is detected from the output of a load sensor 24, a pump and an electromagnetic valve 26 are actuated, and the air is discharged from the bag body 21 of a seat cushion 1a, thereby reducing pressure in the bag body 21 and suiting a seat surface shape to his/her form. Furthermore, when decompression corresponding to the weight of the crew member estimated from the output of the load sensor 24 is reached, the pump is stopped and the electromagnetic valve 26 is closed. Also, in the change of the seat surface form, a lumber support 12 and a head rest 1c relatively move up due to a drop in the height of a waist part with the sink of the seat surface. In order to correct the drop, the lumber support 12, the head rest 1c and a seat lifter A are made capable of shifting vertically.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automobile seat device, and more particularly to an automobile seat device that deforms the shape of a seat surface to match the body shape of an occupant and maintains the shape.

[Prior art]

Usually, a car seat has a seat back that supports the passenger's back, and a seat back that supports the passenger's back. A seat cushion that forms a seating surface.As a means to improve the sitting comfort of the seat cushion, for example, as described in Japanese Utility Model Application Publication No. 60-42152, The outer skin material at the border can be opened and closed, and the cushion material inside the seat cushion can be attached and removed.
Seat cushions with variable hardness, elasticity, etc. are known.

[Problem to be solved by the invention]

In the above-mentioned car seats, the body pressure distribution differs for each occupant due to individual differences in the body shape and weight of each occupant, so the surface pressure of the seat surface for each occupant differs individually. It has been extremely difficult to provide a seat with improved ride comfort and holdability for all occupants of different body shapes and weights.

To solve this problem, the dispatcher first deforms the seat surface depending on the body pressure distribution based on the body shape and weight of the occupant when they are seated, and by holding the seat surface in that deformed shape, In response, we proposed a seat device that improves ride comfort and holdability.

However, when the seating surface deforms depending on the body shape and weight of the occupant when seated, the height of the lumbar region, the so-called hip point, changes, resulting in a problem in that the lumbar support ability, head support ability, etc. are reduced.

An object of the present invention is to solve the above-mentioned problems and provide a seat device for an automobile that can improve ride comfort and holdability, as well as ensure sufficient lumbar support ability.

(!!l!Means for Solving the Problem) To achieve the above object, the present invention provides a seat device for an automobile, which is provided with an adjusting means for adjusting the shape of the seat surface to match the body shape of the occupant when the seat is seated. , a detection means for detecting the seat height at the time of said adjustment, and a moving means driven in response to information from the detection means to vertically move a seat support portion comprising a lumbar support, a headrest, and a seat lifter. It was established.

[Effect]

The automobile seat device of the present invention configured as described above deforms the shape of the seat surface according to the body shape of the passenger when the occupant sits on the seat, maintains the deformed shape, and deforms the shape of the seat surface. The system detects the height of the seat when the seat height changes, and moves the seat support unit, which consists of the lumbar support, headrest, and seat lifter, in the vertical direction according to changes in the seat height.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a partially cutaway perspective view showing the overall configuration of the seat device according to the present invention, and FIG. 2 is a sectional view of the seat cushion.
Fig. 3 is a side view for explaining the operation of the seat device, Fig. 4 is an enlarged view of the main parts of the seat back, Fig. 5 is an enlarged view of the lumbar support, Fig. 6 is also an illustration for explaining the operation, and Fig. 7 is the control block. It is a diagram.

In FIG. 1, the seat 1 includes a seat cushion 1a,
It consists of a seat back tb which is erected upwardly from the rear end of the seat cushion 1a via a connecting member, and a headrest lc which is installed at the upper end of the seat back 1b.

An inverted U-shaped seat frame 2 is built into the seat back tb, and a pair of slide rails 3, 3 are suspended downward from the horizontal bar at the upper end of the seat frame 2. A slider 4 that engages and slides in the vertical direction is disposed laterally, and the slider 4 has a hela dress.
A column 5 extending downward from lc is fixed.

A nut 6 is fixed to the center of the slider 4, a bolt 7 extending in the vertical direction is screwed into the nut 6, and the lower end of the bolt 7 is connected to a gear in a gear box 9.

The gear in the gearbox 9 is driven by a motor 8 attached to the seat frame 2 via a drive shaft 8a to rotate the bolt 7 and move the slider 44 up and down.
The headless eye C fixed to the slider 4 is moved up and down.

The lower end of the slide rail 3 and the gearbox 9 are attached to the rear surface of the support bracket lO.

A spring S extending laterally is arranged in the middle part of the seat frame 2, a support plate 11 is installed laterally below the spring S, and a ramp support is placed on the support plate 1-11.
12 are arranged.

A fixed arm 14 is erected at the rear of a support frame 13 that is fixed to the floor panel and extends in the front-rear direction of the vehicle body, and a drive arm 15 is installed in front of the support frame 13 so as to be air freely. is fixed arm 14+
l: Connected and supported to the upper end of the fi moving arm 15.

A pin 14a is provided at the upper end of the rear fixed arm 14, and is slidably engaged with a cam hole 16a formed as an oblique long hole at the rear of the support bracket 16.
The upper end of is connected to the support bracket 1G by a pin 15a.

A drive shaft tab is fixed to the support bracket 16 and extends in the longitudinal direction, and the tip of the drive shaft 16b is connected to a gear in a gear box 17, and the output shaft 19 of the control motor 18
is connected to a gear in the gear box 17 to form a seat lift A.

The operation of the seat lifter A is such that when the control motor 18 moves the drive shaft 16b in the front-rear direction through the gear in the gear box 17, the support bracket 16 moves in the front-rear direction together with the drive shaft IGb, and the support bracket 16 moves in the front-rear direction. By engaging the cam hole 16a and the pin 14a of the fixed arm 14,
The entire support bracket 16 is moved up and down, and the seat cushion h is moved up and down.

In FIG. 2, the seat cushion 1a is a flexible bag 2 which is placed on a pan frame 20 and filled with a cushion material 21a made of urethane foam having open cells.
1! 3! The upper surface and surrounding area are covered with a skin material 22.

A pressure sensor 23 for detecting the pressure inside the bag body 21 and a load sensor 24 disposed between the pan frame 2°0 and the bag body 21 are provided, and the bag body 21 has an electromagnetic valve 26. A pipe 25 is connected, and the supply/exhaust pipe 25 is communicated with a pump (not shown).

When the load sensor 24 detects that the occupant is seated, the bag 21 is deformed by the weight of the occupant to match the seating state of the occupant, and the pump is activated to discharge the air contained in the cushion material 21a inside the bag 21. When the pressure sensor 23 detects that the inside of the bag body 21 has reached a predetermined negative pressure state, the bozobu is stopped and the deformed state is maintained.

When it is no longer necessary to maintain the deformed state, air is supplied into the bag body 21 from the supply/exhaust pipe 25 to return it to its original state.

Further, the cushioning material filled in the bag body 21 may be of a liquid type, and when the occupant is seated, the tα shape flows out and the bag body 21 is deformed according to the seated state of the occupant.

Furthermore, a shape memory resin layer and a heating heater are provided on top of the bag filled with the liquid type, the shape memory resin layer is heated to deform the seat surface to fit the body shape of the occupant, and the heating is stopped after the shape is deformed. It may also be used to maintain the deformed state.

Next, the operation will be explained: (1) When the occupant is seated, the load sensor 24 outputs a signal to detect the seating and estimate the weight of the seated occupant.

(2) When it detects that a passenger is seated, the pump? 1tiff
The air inside the bag body 21 of the seat cushion 1a is discharged by driving the valve 26, the pressure inside the bag body 21 is lowered, and the shape of the seat surface is adjusted to the body shape of the occupant.

(3) The degree of decompression corresponding to the weight of the occupant estimated based on the output signal from the load sensor 24 is reached, that is, the bag body 2
When the internal pressure reaches a predetermined negative pressure state, the pump is stopped and the solenoid valve 2G is closed.

As for the degree of decompression corresponding to the weight of the occupant, that is, the negative pressure state, it is of course possible to calculate the degree of decompression linearly with respect to the body weight, but it is possible to calculate the degree of decompression linearly with respect to the body weight, but it is possible to calculate the degree of decompression in advance by dividing the body weight into a plurality of numerical ranges with an appropriate width. It is also possible to set the degree of pressure reduction for each numerical range.

(4) In the above-mentioned change in the shape of the seat surface, the seat surface is lowered (due to the lowering of the lumbar height (hip point) caused by t, Ramper Sabo 12 and Hera Dress) 1c are relatively elevated. (1b-t in Figure 3).

1cm, see), in order to correct this, Lamper Sahoro 2 and Headrest 1 are installed according to changes in seat height.
c. The seat support section consisting of the seat lifter A is moved in the vertical direction.

Here, as an example of the means for correcting the relative rise of the lumbar support 12 and the head rest 1c caused by the lowering of the hip point, there are the following methods (a) As a first example, the output from the pressure sensor 23 Detected by signal
The lowering of the seat surface, that is, the hip point, is calculated from the pressure inside the bag body 21, and compared with the height of the seat l, the control motor 18 is operated to drive the seat lifter described above.
The drive shaft 16b is activated through the gearbox 17.
When the cam hole 1 is moved rearward, the support bracket G is moved rearward together with the drive shaft 16b, and when the cam hole 1 (ia) is a long hole extending backward, the engagement between the cam hole tea and the pin 14a of the fixed arm 14 is increased. As a result, the entire support bracket 16 moves upward, and the seat cushion h is moved upward (see lc-1 in Fig. 3), thereby reducing the lumbar support 12 and Hendres' eye C caused by the lowering of the hip point. Correct for relative rise.

(b) As a second embodiment, the amount of decrease in the seat surface, that is, the hip point, is calculated from the pressure inside the bag body 21 detected by the output signal from the pressure sensor 23, and the position of the headless eye C is compared. Then, the motor 8 is driven, and the bolt 7 is rotated through the gear in the gear box 9, and the nut 6, that is, the slider 4, is moved downward along the slide rail 3, and the headrest lc fixed to the slider 4 is moved downward. This is to correct the relative rise of the headrest lc.

(C) As a third embodiment, as shown in FIGS. 4 and 5, the bumper sabot 12 disposed in the urethane pad 27 of the seat back lb is made of a flexible material, and the tiQ of the tl is used. The air mat has five chambers a to e in length, and three chambers a, C, and e are arranged vertically on the support plate m-l side, and two chambers are arranged on the passenger side.

The chambers d are arranged vertically, and the five chambers a to e are vertically shifted from each other.

As in the first and second embodiments, the amount of decrease in the seat surface or hip point is calculated from the pressure inside the bag body 21 detected by the pressure sensor 23, and the position of the lumbar support 12 is compared. The chambers to be expanded are selected from among chambers a to e, and as shown in FIG.
, b, a is selected and inflated, the lumbar support position will rise.

The ItllI control for performing the operations described above will be explained with reference to FIG. 7. Signals from the load sensor and pressure sensor are input to the microprocessor, and the pump and solenoid valve 2
6 to reduce the pressure inside the seat cushion laO bag body 21 to change the shape of the seat cushion 1Ω, and at the same time, the seat lifter A of the first embodiment
When correcting f, the signal from the seat position detector is input to the microprocessor for calculation, and the control morph 18 is operated to move the seat cushion Ia up and down.

Also, in the second embodiment of the headless) I at the position of lc
When correcting with flfT, the signal from the headrest position detector is input to the microprocessor, and morph B is activated to move the position of the headrest 1c up or down.

Furthermore, in the case of selectively adjusting the chambers a-e to be expanded in the lumbar support 12 according to the third embodiment, the pump and the solenoid valve on the lumbar support side are operated to expand the chamber a-e.
Selectively inflate the chamber to be inflated from -e.

In addition, a manual switch is provided so that the desired state can be adjusted, such as adjusting the degree of decompression inside the bag body 21, adjusting the position of the adjusted headrest 1c, or changing the expansion chamber of the lumbar support 12. etc.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

The height of the seat is detected by changing the shape of the seat according to the passenger's body shape, and even if the hip point moves, the system automatically adjusts the lumbar support, headrest, etc. according to the change in seat height.
Since the seat support section, which is controlled by the seat lifter, is moved in the vertical direction, a sufficient constant support capacity can be ensured at all times, and the riding comfort is improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway perspective view showing the entire lateral side of the seat device according to the invention, Fig. 2 is a sectional view of the seat cushion, and Fig. The figure is a side view for explaining the operation of the seat device, Figure 4 is an enlarged view of the main parts of the seat back, Figure 5 is an enlarged view of the lumbar support, and Figure 6 (
A) to (E) are similarly operational explanatory diagrams, and FIG. 7 is a control block diagram. h・・lb・・4・・8・・A・・Seat cushion,・I-hack,Ic・・Hendrest,・Slider, 7・・Bolt,・・Motor, 12・・Run parza boat, seat lifter

Claims (1)

[Claims] (1) A seat device equipped with a means for adjusting the shape of the seat surface to match the body shape of the occupant when the seat is seated, including a detection means for detecting the height of the seat surface at the time of adjustment, and a drive based on information from the detection means. What is claimed is: 1. A seat device for an automobile, comprising: a moving means for vertically moving a seat support portion;