JPH018429Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a seat cushioning device provided in a vehicle seat.

Conventionally, seats equipped with devices that buffer the inertial force that acts on the seated occupant during sudden braking or collisions include safety belts and cushion seats 2 as shown in Figure 1.
There are methods to prevent front slippage, such as forming a raised part on the front end seating surface of a safety belt, but it is cumbersome to wear a safety belt, so it is often not worn, and the body is restrained. ,
It is difficult to drive or sit comfortably, and there are problems with poor driving and seating comfort.
In addition, the front slippage prevention device has a problem in that it cannot be expected to be very effective because the raised portion cannot be made into an extreme shape considering the fatigue of the occupant's thighs. There are also seats that buffer the horizontal inertia force in the event of sudden braking or a collision, but because they are configured to operate horizontally, the excess inertia applied to the occupant causes the occupant to slide forward, but the seat is not thrown forward. It had some flaws.

Therefore, this idea was devised by focusing on the above-mentioned conventional problems. A support link is provided between the cushion seat and the base, which can be freely moved in the front and rear direction, and the upper end of the support link is used as the base for rotation. By suspending the seat and supporting the cushion seat by rotatably attaching the lower end of the support link to the cushion seat, the inertial force that acts on the occupant is more effectively reduced, especially during sudden braking or collisions. It is an object of the present invention to provide a seat shock absorbing device that can improve safety by providing a cushion to the vehicle body, and is also excellent in normal driving performance and seating comfort.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

2 to 5 are drawings showing a first embodiment of this invention. In this drawing, the reference numeral 8 indicates a seat shock absorbing device, and this device 8 is interposed between the cushion seat 10 and the base 12 of the seat 9, and buffers the inertial force that acts on the seated person during sudden braking or collision. This improves safety.

That is, the seat shock absorber 8 includes a slider mechanism 14 and a link mechanism 16. The slider mechanism 14 is provided at the rear of the base 12 attached to the floor 18, and has a pair of U-shaped rails 20, 20 extending in the front-rear direction and facing each other. Both rails 20,
A rear support stand 22 that supports the rear part of the cushion seat 10 is spanned between the cushion seats 10 and 20, and this rear support stand 22 is formed to be movable in the front and rear directions by means of wheels 24 rotatably attached to both ends of the rear support stand 22. There is. Further, the link mechanism 16 is located at the front of the base 12, and there are support links 2 on both sides of the base.
6, and these support links 26 are suspended by pins 30 attached to the bracket 28 so as to be able to swing back and forth.

A gate-shaped front support stand 29 for supporting the front part of the cushion seat 10 is spanned between the lower ends of the pair of support links 26, 26, and the support pin 3
2, 32a so as to be rotatable.
This front support stand 29 is designed to attenuate the pendulum movement of the support link 26 by the weight of the cushion seat 10 and the weight of the seated person, and the front support stand 29 moves up and down in conjunction with this pendulum movement. ing. A buffer member 34 is attached to the support pin 32a to further dampen the pendulum movement of the support link 26. In other words, the vibration isolating rubber 34, which is a shock absorbing member, has a short cylindrical shape, and the plate 26 attached to the base 12 and the link 38 are tightened from both sides by the tightening bolts 39.
It is sandwiched through. This link 38 is a link 4 rotatably attached to the support pin 32a.
0 via a pin 42. Both links 38 and 40 transmit the restoring force generated in the vibration isolating rubber 34 against the elastic torsional deformation due to the pendulum movement of the support link 26 to the support pin 32a, so that the pendulum movement of the support link 26 is maintained over time. It is beginning to attenuate as the temperature increases. Such a slider mechanism 1
4 and a link mechanism 16
In this case, even if an inertial force acts on the seated person and the seated person is likely to be thrown forward during a shock absorbing event, the damping swing of the cushion seat 10 can buffer the inertial force and improve safety. At the same time, the front side of the cushion seat 10 is tilted upward to effectively prevent the seated person from being thrown forward.

Next, the effect will be explained.

In the event of sudden braking or a collision, the vehicle's running acceleration suddenly decreases, while the occupant does not move forward at the same speed as before the sudden braking. Therefore, an inertial force acts on the seated person, and this inertial force may cause the seated person to be thrown forward from the cushion seat 10 and encounter an unexpected accident.

However, in this invention, a support link 26 is provided between the cushion seat 10 and the base 12 which are freely movable in the front and rear direction, and the upper end of the support link 26 is rotatably suspended from the base 12.
Since the lower end of the seat cushioning device 8 is rotatably attached to the cushion seat 10 to support the cushion seat 10, as shown in FIG. The cushion seat 10 is in a stationary and horizontal state with respect to the base 12, but during sudden braking, the cushion seat 10 swings back and forth along with the seated person due to the inertia force in the forward direction. The front part of the cushion seat 10 moves upwards, after which these movements gradually decay over time.

That is, as shown in FIG. 4, the rear support stand 22 that supports the rear part of the cushion seat 10 moves forward along the rail 20, and the front support stand 29 that supports the front part of the cushion seat 10 moves forward. It moves forward as the support link 26 rotates. When the support link 26 rotates clockwise to the maximum raised position, the weight of the cushion seat 10 and the weight of the seated person rotate the support link 26 counterclockwise, that is, in the opposite direction to the rotation direction. As shown in FIG.
makes a pendulum movement in the counterclockwise direction, and this pendulum movement is repeated and gradually attenuates. With this pendulum movement of the support link 26, the vibration isolating rubber 34
A buffering force is applied to the support pin 32a through the support pins 8 and 40, thereby damping the pendulum movement of the support link 26. In this way, the support link 26 and the prevention rubber 34
Since the seated person moves together with the cushion seat 10 while being damped by the cushion seat 10, the seated person is not thrown off the cushion seat 10. Further, when the support link 26 rotates, the cushion seat 1
The front part of 0 is raised to a height H by the rotation of the support link 26.
The cushion seat 10 rotates slightly clockwise around the wheels 24 attached to the rear support base 22. Therefore, the cushion seat 10 is tilted downward toward the rear, and the back seat 44 is tilted rearward. As a result, the seated person will be able to lean more deeply against the back seat 44 as the seat moves integrally with the cushion seat 10.
It is less likely to be thrown forward, and safety during sudden braking or collisions is much improved.

FIG. 6 shows a second embodiment of this invention.

This second embodiment shows an improvement of the buffer member 46 for damping the swinging of the support link 26. That is, a pair of anti-vibration rubbers 46, which are shock-absorbing members, are attached to the lower end of the support link 26 in a suspended state so as to be sandwiched therebetween from the front and rear directions with a predetermined gap.

Since the operation of the second embodiment is substantially the same as that of the first embodiment, the explanation thereof will be omitted.

It should be noted that this invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made. For example, the rail of the slider mechanism may be provided so that it slopes downward toward the rear, so that when the cushion seat is moved back and forth, the cushion seat can be tilted at any time to improve safety. .

As is clear from the above description, according to this invention, a support link is provided between the cushion seat and the base, which can be freely moved in the front and back direction, and the upper end of the support link is rotatably suspended from the base. Since the lower end of the cushioning seat is rotatably attached to the cushioned seat to support the cushioned seat, the seat cushioning device allows the seated person to reciprocate back and forth with the seat in the event of a collision or sudden braking. The inertial force acting on the seated person is buffered, and the rear part of the entire seat can be tilted slightly downward. As a result, there is no fear that the seated person will be thrown forward by the inertial force, resulting in the effect of improving safety during vehicle travel.

In addition, according to this invention, unlike conventional devices such as raised parts in the front of the seat and safety belts that were installed as forward slippage prevention devices, it has excellent drivability and seating comfort in normal conditions. It is much safer and highly effective for use in vehicles.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a conventional seat, FIG. 2 is a perspective view showing a seat cushioning device according to the first embodiment of the invention, FIG. 3 is an operational view showing the seat cushioning device in a resting state, and FIG. The figure is an operational view showing the forward movement of the seat shock absorber, FIG. 5 is an operational view showing the backward movement of the seat shock absorber, and FIG. 6 is a view showing the seat shock absorber according to the second embodiment of the invention. FIG. 9...Sheet, 10...Cushion sheet, 1
2...Base, 14...Link mechanism, 16...Slider mechanism, 18...Floor, 24...Wheel,
26...Support link.

Claims (1)

[Claims for Utility Model Registration] A link mechanism provided between a base on the floor side and a front part on the cushion seat side that is movable in the longitudinal direction with respect to this base, and the base on the floor side and the cushion seat. A seat shock absorbing device for a vehicle having a slider mechanism provided between the cushion seat side and the rear part of the vehicle, wherein the upper end is rotatably suspended from the base side and the lower end is attached to the link mechanism in a state where the upper end is rotatably suspended from the cushion seat side. a support link rotatably attached to the slider mechanism, a rail attached to the base side of the slider mechanism, and a wheel attached to the cushion seat side that rolls along the rail, A seat shock absorbing device characterized in that the support link is rotated by an external force acting on the cushion seat, and the cushion seat side swings back and forth to buffer the inertia force acting on the seated person.