JPH04356240A - Vehicle seat device - Google Patents

Abstract

PURPOSE:To prevent occupants from suffering discomfort by effectively absorbing impact loads acting during a collision of a vehicle so as to reduce pressure that the passerngers may feel. CONSTITUTION:An impact cushioning member comprised of a lock member 12, which is plastically deformed with impact loads acting during a collision of a vehicle, and the like is provided on the lower surface of a seat cushion 1 constituting a seat 3 and the seat cushion 1 is supported to a vehicle body via the impact cushioning member and the impact cushioning member is plastically deformed so as to absorb impact energy caused by collision.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat device mounted on an automobile or the like.

0002

2. Description of the Related Art Conventionally, as shown in, for example, Japanese Utility Model Application Publication No. 62-56472, a seat belt for holding an occupant is provided on a vehicle seat consisting of a seat cushion and a seat back. BACKGROUND ART BACKGROUND ART BACKGROUND ART BACKGROUND ART A method is used to absorb impact energy acting on an occupant while preventing the occupant from moving in the event of a collision.

0003

[Problems to be Solved by the Invention] When the seatbelt is configured to hold the occupant in the seat as described above, the seatbelt deforms in response to the impact load that is applied during a frontal collision of the vehicle. Although it is possible to alleviate the impact that the occupant receives, there is a problem in that if an impact load that exceeds the impact mitigation ability of the seat belt is applied, the occupant will feel pressured by the seat belt. Further, when an impact load is applied from the rear of the vehicle body during a rear-end collision, the impact cannot be alleviated, and there is a problem in that the occupant is pressed against the seat back and feels uncomfortable.

[0004] Particularly in the case of a rigid type seat in which the seat cushion and the seat back are integrally formed, it is not possible to obtain a shock absorbing effect by deforming the joint between the seat cushion and the seat back. There is a problem in that occupants experience a great sense of pressure due to the impact that is exerted upon a vehicle collision.

The present invention has been made to solve the above problem, and it is an object of the present invention to effectively absorb the impact load when a load exceeding the impact mitigation ability of the seat belt is applied during a frontal collision of a vehicle. It is an object of the present invention to provide a vehicle seat device which is capable of effectively alleviating the impact even when an impact load is applied from the rear side of the vehicle body during a rear-end collision of the vehicle.

[0006]

[Means for solving the problem] The invention according to claim 1 is:
An impact-reducing member that plastically deforms in response to an impact load applied during a vehicle collision is provided on the lower surface of a seat cushion constituting the seat, and the seat cushion is supported on the vehicle body via this impact-reducing member.

[0007] In the invention according to claim 2, a shock absorbing member is disposed at the lower front portion of the seat cushion, and the seat cushion is supported on the vehicle body by a support portion disposed behind the shock absorbing member.

[0008]

[Operation] According to the invention as set forth in claim 1, the impact load that acts upon a vehicle collision is transmitted to the impact mitigation member via the seat cushion, and the impact mitigation member is plastically deformed in response to the impact load. This allows the impact energy to be absorbed.

According to the second aspect of the invention, the seat cushion oscillates about the support portion in response to the impact load that is applied during a vehicle collision, and the impact load is applied to the impact mitigation member located in front of the seat cushion. will act in a concentrated manner.

0010

[Embodiment] Fig. 1 shows an embodiment of a vehicle seat device according to the present invention. It has a pair of left and right seat sliders 5 installed on the seat slider 5, and a support shaft 6 for the seat cushion 1 attached on the seat slider 5, and holds the occupant on the seat 3 via a seat belt (not shown). It is configured as follows. The above sheet slider 5 is shown in FIG.
As shown in FIG. 3, a lower member 8 is attached to the upper surface of the floor panel 4 via a mounting bracket 7, and an upper member 9 is slidably supported by the lower member 8.
A connecting member 10 made of an angle member is attached to the inner surface of the upper member 9 to connect the left and right sheet sliders 5 to each other.

A support member 11 made of C-shaped steel is erected at the center of the connecting member 10, and inside this support member 11 are a front plate 12 made of a steel plate or the like having a predetermined thickness, and a rear plate 13. A locking member 14 having a U-shaped cross section is provided, and
The upper end of the rear plate 13 of the locking member 14 is fixed to the inner wall surface of the support member 11 by welding, bolting, or the like. The front plate 12 of the locking member 14 has three engaging holes 17 at upper and lower positions into which the engaging portions 16 of the height adjusting lever 15 attached to the seat cushion 1 are inserted.

The height adjustment lever 15 includes a lever body 20 that is swingably supported by a support bracket 18 fixed to the lower surface of the seat cushion 1 via a support shaft 19;
The lever body 20 has a handle portion 21 projecting forward from the upper end thereof, and an engaging portion 16 projecting rearward from the lower end portion of the lever main body 20. seat cushion 1 by being inserted into one of the 17
The front end is supported at a predetermined height.

[0013] Also, on the upper surface of the upper member 9, as shown in FIG.
As shown in FIG. 2, a support member 23 having a U-shaped cross section and having a pair of opposing left and right guide plates 22 is attached by a mounting bracket 24. As shown in FIG. Further, on the lower surface of the side edges of the seat cushion 1, a regulating member 27 having an L-shaped cross section and consisting of a locking plate 25 extending in the front-rear direction and a reinforcing plate 26 protruding inward from the front end of the locking plate 25 is provided. is provided in a protruding manner, and the locking plate 25 of the regulating member 27 is inserted between the guide plates 22 of the supporting member 23, thereby regulating the movement of the seat 3 in the left-right direction.

[0014] If the vehicle is rear-ended and an impact load is applied from the rear side of the vehicle body while an occupant is seated on the seat device configured as described above and is wearing a seat belt (not shown),
When the occupant is pressed against the seat back 2, a moment is generated in a direction that raises the front end of the seat cushion 1 about the support shaft 6 as a fulcrum. As a result of the moment being transmitted to the locking member 14 via the height adjustment lever 15, as shown in FIG.
As shown by the solid line, the front plate 12 of the locking member 14 is pulled up and the locking member 14 is plastically deformed. In addition, when a vehicle is in a head-on collision and an impact load is applied from the front side of the vehicle body, the seat back 2 is urged forward by inertia along with the occupant restrained by the seat belt, so that the seat cushion 1 A moment is generated in the direction of lowering the front end, and the front plate 12 of the locking member 14 is pushed down in response to this moment, causing the locking member 14 to plastically deform as shown by the imaginary line in FIG.

As described above, the locking member 14 having a U-shaped cross section is provided on the lower surface of the seat back 3 constituting the seat 3, and the locking member 14 is configured to be plastically deformed in response to the impact load applied during a vehicle collision. This locking member 14
By deforming the structure, it is possible to absorb the impact energy during a collision. Therefore, in the event of a frontal collision, the occupant seated in the seat 3 may feel pressured by the seatbelt due to the impact load acting from the front side of the vehicle body, or may be pressed against the seatback 2 by the impact load acting from the rear side of the vehicle body in the event of a rear-end collision. It is possible to prevent the occupant from feeling uncomfortable due to the accident.

In particular, as described above, a shock absorbing member consisting of the locking member 14 is provided at the front end of the lower surface of the seat cushion 1, and a support section consisting of the support shaft 6 etc. is provided at the rear thereof, and this support section is used as a fulcrum. In the case where the seat cushion 1 is configured to swing and displace, the impact load that acts upon a vehicle collision can be concentrated and applied to the installation portion of the locking member 14, so that the impact load upon the collision is reduced. It has the advantage of being able to absorb energy effectively.

Further, when the height adjustment lever 15 is provided on the lower front part of the seat cushion 1 as shown in the above embodiment, the lever body 20 is operated to swing by holding the handle 21 of the lever 15. By doing so, the installation height of the front end portion of the seat cushion 1 can be adjusted. That is,
The engaging portion 16 of the lever 15 is connected to the engaging hole 1 of the locking member 14.
7 to release the locking state of the seat cushion 1 by the height adjustment lever 15, and in this state, after swinging the seat 3 about the support shaft 6 as a fulcrum, the engaging portion 16 is By inserting it into the engagement hole 17, the installation angle of the seat cushion 1 can be changed and the installation height of the front end portion thereof can be finely adjusted.

Note that the height adjustment lever 15 is omitted,
The upper end of the front plate 12 of the locking member 14 may be attached to the lower surface of the seat cushion 1 via a mounting bracket or the like. In addition, instead of the shock absorbing member consisting of the locking member 14 having a U-shaped cross section, as shown in FIGS. 6 and 7, a slit groove 28 extending in the vertical direction and a locking hole 29 located in the center thereof are used. The formed locking plate 30 may be attached to the upper surface of the connecting member 10, and a lifting plate 32 having an engagement pin 31 inserted into the locking hole 29 may be provided on the lower surface of the seat cushion 1. With this configuration, when an impact load is applied during a vehicle collision, the engaging pin 31 slips out of the locking hole 29 of the locking plate 30 and moves upward or downward while expanding the slit groove 28. The locking plate 30 is plastically deformed in accordance with the vertical displacement of the engagement pin 31, thereby absorbing the impact energy at the time of a collision.

[0019]

[Effects of the Invention] As explained above, the present invention is applicable to cases in which an impact load is applied from the front of the vehicle body due to a head-on collision, or an impact load is applied from the rear side of the vehicle body due to a rear-end collision. In both cases, there is an advantage that the impact energy can be effectively absorbed, the impact acting on the occupant can be alleviated, and the occupant can be properly protected.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of a vehicle seat device according to the present invention.

FIG. 2 is a partially enlarged front view showing essential parts of the present invention.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a sectional view taken along line BB in FIG. 2;

FIG. 5 is an explanatory diagram showing a state in which the locking member is deformed.

FIG. 6 is a diagram corresponding to FIG. 2 showing another embodiment of the present invention.

FIG. 7 is a sectional view taken along line CC in FIG. 6;

[Explanation of symbols]

1 Seat cushion 3 Sheet 4 Floor parts (vehicle body) 6 Support shaft (support part) 12 Locking member (shock mitigation member) 30 Locking plate (shock mitigation member)

Claims (2)

[Claims] [Claim 1] An impact mitigation member that plastically deforms in response to the impact load applied during a vehicle collision is provided on the lower surface of the seat cushion constituting the seat, and the seat cushion is supported on the vehicle body via the impact mitigation member. A vehicle seat device characterized by: 2. The vehicle according to claim 1, further comprising a shock absorbing member disposed at the front portion of the lower surface of the seat cushion, and the seat cushion being supported on the vehicle body by a support portion disposed behind the shock absorbing member. sheet equipment.