JPH09150651A - Vehicle seat device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To improve rigidity of a seat to be lifted up against a load acting from a belt anchor portion with a simple configuration. A lower arm 1 supported on a floor of a vehicle.
And the upper arm structure 2a to which the seat cushion 30 is attached, and the lift-up mechanism 10 that lifts up the upper arm structure 2a with respect to the lower arm 1, and the reinforcing member 5 that connects the upper arms provided on the left and right sides. Oblique links 11, 1 for connecting the lower arm 1 with the belt anchor attachment portion 45 to which the upper seat belt is attached
Even if a load is applied to the belt anchor 13, the diagonal links 11 and 12 allow a part of the load to escape and the rigidity of the belt anchor portion 13 can be improved by a simple structure.

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 for performing lift-up, and more particularly to a vehicle seat for lift-up of an RV system or the like.

[0002]

2. Description of the Related Art Conventionally, as a vehicle seat in which a seat cushion is moved up and down, an actual open shovel has been proposed.
No. 4-6138 is known. This publication discloses a vehicle seat in which a seat cushion is divided into a front cushion and a rear cushion, a rear cushion is attached to a vehicle side, an upper arm is raised with respect to a lower arm, and a rear cushion is positioned higher than a front cushion. Is disclosed. This front cushion of the prior art constitutes a child seat device by becoming a foot rest portion of a child.

[0003]

In this conventional seat apparatus, since the belt anchor to which the seat belt is attached is on the lifted-up upper arm side, the load on the seat belt supports the lower arm and the upper arm. It will be supported by an X-shaped lift-up mechanism. Therefore, since the load applied to the belt anchor is entirely received by the lift-up mechanism, the lift-up mechanism needs strength.

Therefore, it is a technical object of the present invention to improve the rigidity against a load acting from the belt anchor portion with a simple structure in a lifted-up seat.

[0005]

In order to solve the above-mentioned technical problem, the first technical means taken in the present invention is to provide a lower arm 1 supported on a floor of a vehicle as shown in FIG. In a vehicle seat device including an upper arm structure 2a to which a seat cushion 30 is attached, and a lift-up mechanism 10 that lifts up the upper arm structure 2a with respect to the lower arm 1, a seat provided in the upper arm structure 2a. Belt anchor attachment portion 45 to which the belt is connected, and diagonal links 11 and 12 connecting the belt anchor attachment portion 45 and the lower arm 1.
It is to have. With the above configuration, for example, when a sudden acceleration / deceleration of the vehicle occurs, even if the load applied to the seat belt is applied to the belt anchor 13, a part of the applied force is received by the diagonal links 11 and 12. it can. As a result, the load applied to the lift-up mechanism 10 can be reduced, and the rigidity with respect to the load applied from the belt anchor portion 45 can be improved.

In the second means, the upper arm structure 2
Since a is composed of the upper arm 2 and the reinforcing members 5, 6, 7, and 8, the rigidity of the upper arm 2 can be improved.

In the third means, the slanted links 11 and 12 are used.
In addition, the lift-up mechanism 10 causes the upper arm structure 2a to rotate when the upper arm structure 2a moves up and down.
By providing the seat cushion 30, it is possible to perform a smooth lift-up without hindering the rise and fall of the seat cushion 30.

In the fourth means, the lift-up mechanism 10
And when the upper and lower dead centers are reached, the upper arm structure 2a
The seat cushion 30 can be steadily fixed at the top-bottom dead center by providing the lock mechanism 35 that holds the state of the position.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

In the following description, it is assumed that the lever 15 for vertically lifting up the seat cushion and the other components except the belt anchor 13 are in a left-right pair.

Therefore, FIG. 1 will be described.

Here, there is a lower arm 1 supported on the floor of a vehicle (not shown), and mounting portions 21 and 22 are fixed to the front and rear of the lower arm 1 by welding, and bolts are attached via the mounting portions 21 and 22. Fixed to the floor of the vehicle.

A seat cushion attachment portion 23 is attached to an upper front portion of the lower arm 1, and seat cushion front portions 31 of front and rear seat cushions 30 and 31 are attached by the seat cushion attachment portion 23. In this way, the seat cushions 30, 31
Is divided into two, and a lift-up mechanism 10 for vertically moving the position of the upper arm 2 is provided in front of and behind the lower arm 1.

In the present embodiment, the lift-up mechanism 10 has an arm 3 made of a rigid plate so as to have an X shape.
However, this shape is not limited as long as the upper arm 2 can move vertically with respect to the lower arm 1.

The arms 3 and 4 constituting the lift-up mechanism 10 are constructed as follows.

A protrusion 27 provided at the center of the arm 4
And the elongated hole 28 provided in the central part of the arm 3 and parallel to the arm shape, the two can rotate relative to each other, and the protrusion 27 provided on the arm 4 side can slide along the elongated hole 28. become. Regarding the connection of both ends of the arm, one end of the arm 3 is crimped to the support portion 18 of the lower arm 1 and the other end is crimped to the support portion 16 of the upper arm 2. Further, one end of the arm 4 is crimped to the support portion 17 of the lower arm 1 and the other end thereof is engaged by the protrusion 25 provided on the upper arm side. That is, the one end of the arm 4 on the upper arm 2 side has the protrusion 25, and the protrusion 25 is formed by a pin or the like. Specifically, as shown in FIG. 3, the upper arm 2 has a flange 46 between the upper end of the arm 4 and the upper arm 2.
The tip of the pin penetrates to form a protrusion 25, and the stopper member 47 such as a washer or a C ring prevents the upper end of the arm 4 and the upper arm 2 from being disengaged. By sliding the protrusion 25 in the long hole 26 provided in the front portion of the upper arm 2,
The height when the lift-up mechanism 10 is lifted is determined. A lock mechanism 3 for fixing the position of the lift-up mechanism 10 at this time.
5 will be described later.

As described above, the arms 3 and 4 of the lift-up mechanism 10 are attached to the upper arm 2 below, and the seat cushion rear portion 30 is attached to cover the upper arm 2.

The reinforcing member 5 of the upper arm 2 forms an upper arm structure 2a together with the upper arm 2,
A belt anchor 1 to which a buckle (not shown) for a seat belt is attached at a position near the reinforcing member 5 is attached.
4 is attached and a buckle (not shown) of a seat belt that comes out of the vehicle is inserted, but the upper arm structure 2a does not necessarily have to include the reinforcing member 5.

A reclining portion 20 is attached to the upper part of the upper arm 2 to which the belt anchor 14 is attached via a rotating portion 19, and the left and right reclining portions 20 are connected by a link 9 to form a seat. The seat back 32 is mounted by the back mounting portion 24.

The seat back 32 can be turned back and forth about the turning portion 19 by a reclining operation lever (not shown), and the seat back position is fixed by a lock mechanism (not shown) of the seat back 32. To do.

Further, the attachment portions 36 and 50 provided at the central portion (belt anchor attachment portion 45) on the reinforcing member 5 for sliding the left and right upper arms 2 are fixed to the reinforcing member 5 by welding. Similarly, the attachment portions 37 and 48 provided on both sides of the reinforcing member 8 fixed to the front of the lower arm 1 are also fixed by welding.

In this state, the mounting portions 36 and 50 provided on the reinforcing member 5 and the mounting portion 3 provided on the reinforcing member 8
Reference numerals 7 and 48 denote rotating portions 38 and 5 of the diagonal links 11 and 12.
1 and 39, 49 respectively. The rotating portions 38, 51, 39, 49 are designed so as not to interfere with the vertical movement due to the movement of the lift-up mechanism 10 and allow smooth rotation.

The rotating portion 51 is provided with a belt anchor 13 so that a buckle of a seat belt can be inserted therein. The belt anchor 13 may be provided on the rotating portion 38 of the other diagonal link 11, or
It may be provided on both sides of the diagonal links 11 and 12 of both.

The other ends of the slanted links 11, 12 whose one end is connected to the belt anchor mounting portion 45 may be directly fixed to the lower arm 1.

The lock mechanism 35 shown in FIG. 2 will be described. The lock mechanism 35 holds the position of the upper arm 2 at the top-bottom dead center with the seat cushion 30 that moves up and down by the lift-up mechanism 10, and is operated by the lever 15 provided at the front part of the upper arm 2. It is a thing.

In this figure, the bracket 33 has a substantially vertical L-shape on the upper arm 2 and is fixed to the upper part of the oblong hole in the front part of the upper arm from the inside. One end of the bracket 33 is wound around the shaft 41 at two places. A link member 43 is fixed to the shaft 41,
The linking member 43 is connected to the wire 29 extending from the lever 15, and the linking member 43 and the shaft 41 work together. A lock lever 34 is fixed to the shaft 41. Therefore, the linking member 43, the shaft 41, and the lock lever 34 integrally work together. Further, one end of the coil spring 42 is locked while the end face of the shaft 41 is cut, and the other end is fixed in the C direction by the spring receiving portion 44 of the bracket 33 in the C direction.
Is energizing.

The lock lever 34 has a lock portion 40 for locking the position of the protrusion 25 of the arm 4 on the left and right,
At the position at the top-bottom dead center of the lift-up mechanism 10, the protrusion 2
The position 5 is fixed by the lock portion 40 of the lock lever 34.

Next, the operation of the lock mechanism 35 will be described.

For example, when the seat cushion 30 shown in FIG. 4A is to be moved upward from the lowered state, by pulling the lever 15, the seat cushion 30 is fixed to the shaft 41 in conjunction with the lever 15. When the linking member 43 is pulled in the B direction, the shaft 41 rotates in the C direction. Along with this, the lock lever 34 rotates in the D direction to disengage the protrusion 25 on the arm 4 and the lock portion 40 of the lock lever 34 from each other, and the length provided on the upper arm 2 as shown in FIG. The protrusion 25 of the arm 4 along the hole 26
When the lever 15 is released, the protrusion 25 and the lock lever 34 can be slid by the biasing force of the coil spring 42.
The position is fixed by either of the lock parts 40 provided on the left and right.

FIG. 3 shows the seat cushion 30 raised to the top dead center. That is, the projection 25 moves to the left at the bottom dead center, and the projection 25 moves to the right at the top dead center, so that the projection 25 is locked by the lock lever 34.

Therefore, the operation of lifting up the seat cushion 30 will be described.

First, when the lever 15 is pulled to raise the seat cushion 30 from the state shown in FIG. 4A, the lock mechanism 35 described above is unlocked and the X-shaped arms 3 and 4 are projected. Arms 3 and 4 with 27 as an axis
The upper arm 2 that engages with rises. At this time, the protrusion 27 on the arm 4 moves along the elongated hole 28 provided on the arm 3, and the protrusion 25 on the upper arm 2 side of the arm 4 moves to the elongated hole 26 provided on the upper arm 2. Slide along. Therefore, if the pulling of the lever 15 is stopped, the protrusion 25 is locked by the lock mechanism 35 and the seat position is fixed at the top dead center.

As shown in FIG. 4B, when the lever 15 is pulled to lower the seat cushion 30 from the raised state, the lock mechanism 35 is unlocked and the X-shaped arm 3, 4 is performed by lowering the upper arm 2 which engages with the arms 3 and 4 with the protrusion 27 as an axis. At this time, the long hole 2 provided on the arm 3
The protrusion 27 on the arm 4 moves along 8 and the protrusion 25 on the upper arm 2 side of the arm 4 slides along an elongated hole 26 provided in the upper arm 2. Then, if the pulling of the lever 15 is stopped, the lock mechanism 35 locks and the seat position is fixed at the bottom dead center, so that the seat cushion 30 can be moved up and down.

In such a case, the seat cushion 3
The ascent and descent operations of 0 may be performed manually, or may be performed by utilizing the urging force of a spring or the like.

Therefore, as shown in FIG. 4B, when a large load is applied to the seat belt while the seat occupant is wearing the seat belt with the seat cushion 30 being lifted, the belt of the seat belt is The diagonal forward load is applied to the anchor 13 and is received by the belt anchor attachment portion 45 to which the belt anchor 13 is attached. Since the load received by the belt anchor portion 45 is provided between the reinforcing member 5 attached to the upper arm 2 and the reinforcing member 8 attached to the lower arm 1 side, the diagonal links 11 and 12 are provided. You can release the load in the direction. As described above, by providing the diagonal links 11 and 12 with respect to the load received by the arms 3 and 4, it is possible to reduce the load, and the rigidity of the belt anchor portion 45 can be improved with a simple configuration. it can.

Further, when the seat cushion 30 is moved up and down, it is possible to prevent the movement of the upper arm 2 from moving up and down by providing the rotating portions 38, 39, 51 and 49 at both ends of the diagonal links 11 and 12, respectively. Without this, smooth vertical movement is possible.

Further, since the lock mechanism 35 is provided to hold the position of the upper arm 2 at the top-bottom dead center, the position can be securely held.

In this seat device, the seat cushions 30 and 31 are divided into front and rear, the front and rear width of the seat cushion 30 is reduced, and the seat cushion rear portion 30 is lifted up to raise the seat position. It is desirable to use it as a second seat for children in vehicles such as.

[0039]

As described above, according to the present invention, in the vehicle seat device in which the upper arm structure is lifted up with respect to the lower arm and the seat cushion position can be raised and lowered, the seated person wears the seat belt. If a sudden acceleration / deceleration occurs while the vehicle is in the state of being in contact, the load of the seat belt diagonally forward is applied to the belt anchor connected to the upper arm structure.However, the diagonal link from the upper arm structure to the lower arm is constructed. By this, a part of the load related to the belt anchor effectively acts on the diagonal link, so that the load related to the upper arm structure can be reduced, and the upper arm structure is configured by the upper arm and the reinforcing member, Stiffness of the seat cushion is achieved by connecting the upper arm structure and the lower arm with diagonal links. It can be improved by a single structure.

Further, since the diagonal link is provided with a rotating portion for rotating when the upper arm is moved up and down by the lift-up mechanism, it is possible to smoothly move up and down without hindering the up and down movement. Become.

Furthermore, this lift-up mechanism is provided with a lock mechanism for holding the position of the upper arm when the position of the upper arm reaches the top and bottom dead center.
The seat cushion can be steadily fixed at top and bottom dead centers.

[Brief description of the drawings]

FIG. 1 is a perspective view of a frame portion of a vehicle seat device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the lock mechanism shown in FIG.

FIG. 3 is an A view of the lock mechanism shown in FIG.

FIG. 4 is a side view of the vehicle seat device according to the embodiment of the present invention.

[Explanation of symbols] 1 lower arm 2 upper arm 3,4 arm 5 reinforcing member 10 lift-up mechanism 11,12 diagonal link 13,14 belt anchor 30 seat cushion (rear part) 31 seat cushion (front part) 35 locking mechanism 38,39 Rotating part 45 Belt anchor mounting part

Claims (4)

[Claims] 1. A vehicle seat device including a lower arm supported on a floor of a vehicle, an upper arm structure to which a seat cushion is attached, and a lift-up mechanism for lifting up the upper arm structure with respect to the lower arm. A vehicle seat, comprising: a belt anchor attachment portion provided on the upper arm structure so as to connect a seat belt; and an oblique link connecting the belt anchor attachment portion and the lower arm. apparatus. 2. The vehicle seat device according to claim 1, wherein the upper arm structure includes an upper arm and a reinforcing member. 3. The tilting link is provided with a turning portion that turns when the upper arm structure moves up and down with respect to the lower arm by the lift-up mechanism. Vehicle seat device. 4. The vehicle seat device according to claim 1, wherein the lift-up mechanism is provided with a lock mechanism that holds the position of the upper arm structure when reaching a top-bottom dead center.