JPS60151137A - Vehicle seat - Google Patents

Abstract

PURPOSE:To change the angle of supporting a side support according to operating conditions, by interlocking a means for driving the side support and a power steering. CONSTITUTION:A seat is provided with a power cylinder 20, a power piston 21, a power steering device consisting of a control valve 25 and a pump 26, and a side support comprising a first link 44, a second link 52 and side panels 48 and 48'. A fluid pressure generated by the power steering device is transferred to a seat power cylinder 28 for driving the side support.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a vehicle seat, and more particularly, to a vehicle seat whose shape can be varied in accordance with the body shape and preferred driving posture of an occupant.

(Prior Art) In such a vehicle seat (Fig. 1), a conventional structure for making the support angle of the side supports 1.1', which support both sides of the occupant, variable, is as shown in Fig. 2. There was something (8 productions - bis bulletin No. 489 No. 1V
-36 pages). By rotating the dial 2, the bracket 3 with NAND moves in the direction of the arrow, and the first link 4
The first arm 4a is rotated around a pin 5 fixed to a seat frame (not shown). As a result, the rotation pin 7 fixed to the second arm 4b of the first link 4 rotates in the direction of the arrow, and the pin 9 fixed to the seat frame moves the side panel 8 housed in the side support 1. Rotate around the center in the direction of the arrow. At the same time, the first link 4
Since the third arm 4C also rotates in the direction of the arrow, this third arm 4C also rotates in the direction of the arrow.
The first arm 12a of the second link 12 rotates in the arrow direction about a pin 13 fixed to the seat frame via a rotation pin 10 fixed to the arm 4C. As a result, the rotating pin 14 fixed to the second arm 12b of the second link 12 rotates in the direction of the arrow, and the side support 1'
The side panel 8' housed inside is rotated in the direction of the arrow around a pin 9' fixed to the seat frame. In this way, the support angle α of the side panel 8.8', i.e., the side support 1.1', is rotated to close inward to match the body shape of the occupant and prevent the occupant's body from falling over even when driving around a curve. can do. Further, when the dial 2 is rotated in the opposite direction, each member is rotated in the opposite direction to the arrow, and the support angle α of the side support 1.1' is opened outward, thereby making it easier for the occupant to move.

However, in such conventional vehicle and dual-use seats, the support angle α of the side support 1.1' can only be changed by rotating the dial 2, and the support angle α of the side support 1.1' can be changed only by rotating the dial 2, and the support angle α of the side support 1.1' can be changed only by rotating the dial 2. This was unrelated to small conditions, etc., so if the support angle α is set large, the body will move easily, but when the turning centrifugal force is large, the body will fall.If the support angle α is set small to prevent the body from falling, it will be easier to move when going straight or turning centrifugally. There was a problem that when the force was low, it was difficult to move the body and it felt cramped.

(Object of the Invention) Therefore, the present invention provides a hydraulic means connected to a power steering device in a drive device that changes the support angle of the side support, and automatically changes the support angle of the side support while driving depending on the driving conditions as described above. When driving straight or when the turning centrifugal force is small, the support angle is widened to allow the occupant's body to move more easily, and when the turning centrifugal force is large, such as when turning at high speed, the support angle is narrowed to allow the occupant's body to shift laterally. The purpose is to prevent them from falling or falling.

(Structure of the Invention) A vehicle seat according to the present invention 811 is provided in a vehicle equipped with a power steering device that generates a steering assist force using hydraulic pressure, supports both sides of an occupant, and has a variable support angle. A side support, and a drive device that changes the support angle of the side support, and the drive device includes a hydraulic means operated by hydraulic pressure generated by the power steering device, and the drive device changes the support angle of the side support depending on driving conditions. The configuration is such that it is automatically varied.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. Third
FIG. 4 is a diagram showing an embodiment of the present invention.

First, to explain the structure, in FIG. 3, 20 is a power cylinder, which is divided by a power piston 2 into a first cylinder chamber 20a and a second cylinder chamber 20b. A rack 23 is fixed to the power piston 21 , which is arranged on the axis of the power cylinder 20 and meshes with a pinion gear (not shown) driven by a steering wheel 22 .

Steering wheels (not shown) are connected to both ends of the rack 23 so as to be steerable. First cylinder chamber 2 of power cylinder 2o
0a and the second cylinder chamber 20b are connected to the control valve 5 connected to the steering wheel 22.
258 and 25b. Control valve 25 boat 2t C is connected to pump 26, boat 25
d is connected to a reservoir tank 27. pump 26
The control valve 25 is connected to the reservoir tank 27 and supplies pressurized liquid to the boat 25c of the control valve 25. The power cylinder 20, power histone 21, rack 23, control valve 25, pump 26, and reservoir tank 27 are all steered by hydraulic pressure. This constitutes a power steering device that generates di assistance. 28 is a seat power cylinder fixed to the vehicle body 30. Inside the seat power cylinder 28, as shown in FIG. 4, a seat power piston 31 is slidably housed. A liquid chamber 28a is defined therein. One end of a "ζ screw non-rod 33 is fixed to the axis of the seat power piston 31 via a piston stopper 32, and this piston rod 33 is connected to the seat power cylinder 2.
8 with the other end protruding from the open end 28b. A bushing 36 is fixed to the open end of the power cylinder for the seat by a C ring 35, and the piston rod 33 is slidably passed through the bushing 36 along the axis iJ1%. A dust seal 37 is provided between the open end 28b of each seat power cylinder and the bush 36 to prevent foreign matter such as dust from entering the seat power cylinder 28. A spring 3 is installed between the seat power piston 31 and the bushing 36.
8 is interposed, and this spring 3B urges the seat power piston 31 to move toward the vehicle body 30. A Teflon ring 40 and an O-ring 41 are interposed between the seat power cylinder 2B and the seat power piston 31 to prevent the pressure fluid in the fluid chamber 28a from flowing out into the space on the spring 38 side. A communication hole 28c is formed on the vehicle body 30 side of the liquid chamber 28a of the seat power cylinder 28, and this communication hole "1i3"
c communicates with the pump 26 and the bow) 25C of the control valve 5, as shown in FIG. Separate power cylinder for seat, power piston for seat 31,
The piston rod 33 as a whole constitutes hydraulic means operated by the hydraulic pressure generated by the power steering device. Referring again to FIG. 3, the piston rod 33
A first arm 44a of a first link 44 is rotatably connected to the other end of the first link 44 about the pin 42. 1st link 4
4 has a second arm 44b and a third arm 44C in addition to the first arm 44'H, and is rotatable around a pin 6 fixed to a seat frame (not shown). . 48 is a side panel housed in the side support of the seat (not shown), and by rotating around a pin 49 fixed to the seat frame (not shown), the support angle α of the side support can be changed. . A connecting arm 48a is fixed to the back side of the side panel 48, and a long hole 48b is formed at the tip of the connecting arm 48a. The tip of the second arm 44b is bent at a substantially right angle, and a pin 47 is fixed to this bent portion, and when the second arm 44b rotates around the pin 45, the rotation pin 47 and the connection Long hole 4 of arm 48a
The side panel 48 can be rotated via 8b. A rotating pin 50 is fixed to the tip of the third arm 440, and this rotating pin 50 is connected to the first link of the second link 52.
It engages with a long hole 52C formed at the tip of the arm 52a. In addition to the first arm 52a, the second link 52 has a second arm 52b that is substantially perpendicular to the first arm 52a.
2c, it is rotatable around a pin 53 fixed to a seat frame (not shown). Site panel 48
′ is also a side panel stored in a side support (not shown), and a pin 49 is fixed to a seat frame (not shown).
By rotating around ′, the support angle α of the side support can be changed. side panel 48'
A connecting arm 48a' is fixed to the back side of the connecting arm 488', and an elongated hole 48b' is formed at the tip of the connecting arm 488'.

The tip of the second arm 52b is bent at a substantially right angle,
A rotating pin 54 is fixed to this bent portion, and as the second arm 52b rotates around the pin 53, the rotating pin 54 and the connecting arm 4 are connected through the long hole 48b' of J'. side panel 48' can be rotated.

Power cylinder 28 for seat, power piston 31 for seat, piston rod 33, pin 42.45.49.
49', 53, the first link 44, the rotation pin 47, the side panel 48, and the second link 52 collectively constitute a drive device that changes the support angle of the side support.

Next, the effect will be explained. When the vehicle is driven in a straight line or when the turning centrifugal force is small, such as when the vehicle is turning at low speed and with a large turning radius, the power steering device does not need to generate a large steering assist force.

Therefore, the control valve δ is not throttled much, and the pressure of the hydraulic fluid supplied from the pump 26 to the boat 25G is low. Since the pressure of this pressure liquid and the pressure of the liquid chamber 28a are equal, the seat power piston 31 and the piston rod 3
3 does not protrude and move, and the side panels 48 and 48
The angle α of ′ is wide open. Therefore, the angle α of the side support of the seat is increased, making it easier for the occupant to move his or her body.

When the driving condition of the vehicle is such that turning centrifugal force is large, such as when turning at high speed and with a small turning radius, the power steering device needs to generate a large steering assist force. Therefore, the control valve 25 is greatly throttled by the steering wheel 22, and the pressure of the pressure fluid supplied from the pump 26 to the port 25c increases.

At this time, the pressure of the pressure liquid in the liquid chamber 28a also increases, so the seat power piston 31 moves toward the open end 28b against the spring 38, and the piston rotor F33 moves toward the first arm 44a (arrowed in FIG. 3). direction). When the piston rod 33 moves toward the first arm 44a, the first link 44 rotates around the pin 45, and the rotation pin 47
Rotate in the direction of the arrow in the figure. As a result, the rotation pin 47 rotates the side panel 48 in the direction of the arrow in the figure (in the direction of reducing α) via the connection arm 48a.

Further, as the third arm 44C rotates in the direction of the arrow, the first arm 52a rotates in the direction of the arrow via the rotation pin 50, and the rotation pin 54 also rotates in the direction of the arrow. This causes the pivot pin 54 to pivot the side panel 48' in the direction of the arrow via the connecting arm 48a'. In this way, in a state where the turning centrifugal force is large, the support angle α of the side support of the seat is small, so that it is possible to prevent the occupant's body from shifting laterally or falling over.

(Effects of the Invention) As explained above, according to the present invention, the hydraulic means connected to the power steering device is provided in the drive device that changes the support angle of the side support. The support angle of the side supports is automatically varied while driving depending on whether the centrifugal force is small or large, and when the centrifugal force is small when driving straight or turning, the support angle is widened to make it easier for the occupants to move their bodies, making it easier to turn at high speeds. When the turning centrifugal force is large, as in the case of , the support angle can be closed to a small value to prevent the occupant's body from shifting laterally or falling over.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional vehicle seat whose shape can be varied, Fig. 2 is a perspective view of a drive device which makes the support angle of the side support of the vehicle seat shown in Fig. 1 variable, and Fig. 3. 4 is an overall configuration diagram of a drive device for varying the support angle of a side sabot 1 of a vehicle seat according to an embodiment of the present invention, and FIG. 4 is a 1tli side view of the power cylinder for the seat shown in FIG. 3. . 20-・-Power cylinder, 21-・-Power piston, 23--1 rank, 25, ...-11 Control hull, 4-1---Pump, 27・--Reservoir pump, 4 ...-bown ring for seat, 31--power piston for seat, 33--piston rod, 42.45.49.4g', 53-'--pin, 44--1st link, 47.50.54---Rotation pin, 48.48'---Side panel, 52---Second link, α---1---Support angle of side sabot-1. Patent Applicant Nissan Motor Co., Ltd. Representative Patent Attorney Agagun Part

Claims (1)

[Claims] A side support that is installed in a vehicle equipped with a power steering device that generates a steering assist force using hydraulic pressure and that supports both sides of an occupant and whose support angle is variable, and a drive device that makes the support angle of the side support variable. In the vehicle seat equipped with the above-mentioned vehicle seat, the drive device is provided with a hydraulic pressure means operated by the hydraulic pressure generated by the power steering device, and the support angle of the side support is automatically varied depending on driving conditions. A vehicle seat featuring: