JP2553186Y2 - Variable cushion seat - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning variable seat.

[0002]

2. Description of the Related Art Various people having different physiques are seated on a seat, and a seated person has different sitting comfort depending on his / her preference. For this reason, it is preferable to configure a cushioning variable seat that can adjust the cushioning properties of the seat cushion according to the occupant's preference.
No. in the official gazette. In the seat, while a pair of swing frames are assembled at one end while maintaining a predetermined interval within a frame of a seat frame that receives a seat cushion, the other ends of the swing frames can be moved forward and backward with respect to each other, The other end of each oscillating frame is threadably engaged with a threaded shaft rotatably supported on a seat frame, and a plurality of wavy zigzag springs are stretched in parallel between each oscillating frame to form a threaded shaft. , The tension of the zigzag spring is variably changed by changing the separation distance of each swing frame by rotating.

[0003]

By the way, in the cushioning variable seat having the above-described structure, the amount of change in the separation distance between the swing frames is greatly different between the base end side and the swing end side. As a result, the amount of change in the tension of each zigzag spring is also greatly different, and the cushioning properties at the portion corresponding to the stretched portion of each zigzag spring are significantly different, which may impair the sitting comfort of the seated person. Accordingly, an object of the present invention is to address such a problem.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a seat cushion is connected to the upper swinging end of each link which is swingably mounted at the front and rear portions of a support member, and is received by the support member so as to be vertically movable. A rotating member rotatably supported in the front-rear direction by the support member, and a lower swing of at least one of the rotating member and each of the links.
A spring member hooked on the end passes portion, said rotary member front and rear
Operating means for rotationally driving the operating means,
Screw member and the rotating member.
To move in the front-rear direction by rotating the screw member.
And a rotation operating member for rotating the screw member.
The present invention is characterized in that it has a further configuration .

[0005]

In the cushioning variable seat having the above-mentioned structure, the rotating operation member constituting the operating means is used.
Rotate the screw member and move the nut member back and forth.
Rotate the rotating member back and forth by a predetermined amount
By stopping the operation of the material, the nut member moves
Position and hold the rotating member in that rotational position.
Can be. As a result, the spring member stretched between the rotating member and the link expands and contracts to change its tension, and the receiving force for receiving the seat cushion is adjusted and held.
You. Such a receiving force acts so as to receive the entire seat cushion via each link, and the cushioning properties of the seat cushion are uniformly adjusted throughout the seat cushion.
As a result, the seating comfort is not impaired by adjusting the cushioning property as in the above-mentioned conventional cushioning variable seat. In this case, the spring member is under the link
The seat cushion is hooked between the side swing end and the rotating
It is in a state of being stretched with a gap from the lower surface of the
The seat cushion has an adverse effect on the
No impact, and the spring member acts as a seat cushion
There is no adverse effect on it.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a seat cushion constituting a seat according to the present invention and a supporting device for receiving the seat cushion; FIG. Have been. The seat cushion constitutes a vehicle seat and includes a cushion cover 1.
1. Cushion pad 12 and cushion panel 13
It consists of. The cushion panel 13 is formed by press-molding a plate.
The outer peripheral edge of a is provided with a flange portion 13b extending downward. The cushion panel 13 is covered with the cushion pad 11 together with the cushion pad 12 to form a seat cushion in a state where the cushion pad 12 is received by the panel body 13a, and is resiliently received by the support device 20. .

As shown in FIGS. 1 to 4, the support device 20 has a support member 21, a pair of front and rear link mechanisms 22, 23, and a spring adjusting mechanism 25 for adjusting the spring force of each of the springs 24a to 24d. ing. The support member 21 includes a pair of left and right frames 21a, 21b and both of the frames 21a, 21b.
b and a connecting plate 21c for connecting
It is fixed on an upper rail of a seat truck mounted on a vehicle interior floor (not shown). Therefore, each frame 2
1a and 21b function similarly to the lower arm provided on the conventional upper rail.

The front link mechanism 22 includes a pair of left and right swing links 22a and 22b, a connecting rod 22c fixed at the base of the two swing links 22a and 22b and connecting the two swing links 22a and 22b, and each of the swing links 22a and 22b.
Sub-link 22 rotatably connected to the upper swing end of the
d, 22e. In the link mechanism 22, each end of the connecting rod 22c is rotatably supported on the front side of each of the frames 21a and 21b so as to be supported by the supporting member.
21 .

The rear link mechanism 23 includes a pair of left and right swing links 23a and 23b, and both swing links 23a and 23b.
And a connecting rod 23c fixed at the base of the connecting rod and connecting the two swing links 23a and 23b. In the link mechanism 23, each end of the connecting rod 23c is rotatably supported on the rear side of each of the frames 21a and 21b, and is assembled to the support member 21.

The spring adjusting mechanism 25 includes a rotating shaft 25a,
Motor 25b, rotating screw 25c, and moving nut 25d
It consists of. The rotating shaft 25a of the present invention
It corresponds to a rotating member, and has a hook portion 25e extending vertically in each of left and right ends, and a connecting portion 25f extending downward in an intermediate portion, and connects each end to each of the frames 21a and 21b. Support member rotatably supported at the middle part
21 . In addition, the motor 25 b is
The rotary operation member corresponds to
25c is rotated.

A motor 25b constituting the spring adjusting mechanism 25
Is fixed on a connection plate 21c constituting the support member 21, and the rotation axis of the motor 25b is
To be able to transmit torque. The rotating screw 25c is a book
A moving nut 25d corresponding to the nut member of the present invention is screwed into the rotary screw 25c so as to be relatively movable forward and backward.
d is supported by the tip of a drive link 25g rotatably connected to a connecting portion 25f of the rotating shaft 25a. Therefore, when the rotary screw 25c rotates by the drive of the motor 25b, the moving nut 25d moves in the axial direction on the rotary screw 25c to swing the drive link 25g to rotate the rotary shaft 25a. The rotating shaft 25a is
Motor 25b is held at its rotational position by
You.

Left and right swing links 22a, 22b and 23a, 23b constituting the front and rear link mechanisms 22, 23, respectively.
Are formed in a substantially L-shape, and upper swing ends of the swing links 22a and 22b of the front link mechanism 22.
And the lower swing end protrudes rearward . Further, the upper swing of each swing link 23a, 23b of the rear link mechanism 23 is performed.
The moving end and the lower swing end protrude forward . Cook
The operation panel 13 is rotatably connected to each of the sub-links 22 d and 22 e of the front link mechanism 22 and is rotatably connected to upper swing ends of the swing links 23 a and 23 b of the rear link mechanism 23. It is connected and supported.

[0013] Each spring pair of left and right front spring 24a, 24b and the rear spring 24c, is divided into 24d, each front spring 24a, 24b each swing link 22a of the front link mechanism 22 to the front end, 22b of the lower swing
Hooked to the end, and is hooked to the rear end to the lower end of each hook portion 25e of the rotary shaft 25a. Also, each rear sp
The front ends of the rings 24c and 24d are hooked on the upper ends of the respective hooks 25e of the rotary shaft 25a, and the rear ends of the rings 24c and 24d are lower swinging ends of the swing links 23a and 23b of the rear link mechanism 23. Hanged on.

Thus, the support device 20 resiliently supports the seat cushion constituted by the cushion cover 11, the cushion pad 12, and the cushion panel 13. 2 to 4 show a support state in which the cushion cover 11 and the cushion pad 12 are omitted. The swing links 22a, 22b are urged in the counterclockwise direction in FIG. 2 by the springs 24a, 24b.
A further stop is restricted by contacting with a stopper 21d protruding from the inner surface of the front part of the front panel. Similarly, each swing link 2
3a and 23b are formed by springs 24c and 24d in FIG.
The stopper 21e is urged in the clockwise direction in the drawing, and is stopped by the stopper 21e projecting from the inner side of the rear portion of each of the frames 21a and 21b of the support member 21 to further restrict the rotation.

The seat having such a configuration is in the state shown in FIG. 2 when the occupant is not seated. In this state, each of the springs 24a to 24d is set to the minimum spring force, and when seated on such a seat, the seat bends downward as shown in FIG. 3 by the action of a load from above. That is, when the cushion panel 13 is pressed by a load from above, the swing links 22a, 22b and 23a, 23b of the front and rear link mechanisms 22, 23 swing, and the upper swing end portions turn downward. I do. As a result, each of the springs 24a to 24d is extended and resiliently receives the occupant seated on the seat cushion.

When the motor 25b of the spring adjusting mechanism 25 is driven in the seat, the rotary screw 25c rotates, and the moving nut 25d moves on the rotary screw 25c in the axial direction to swing the drive link 25g. To rotate the rotating shaft 25a. When the rotating shaft 25a rotates counterclockwise as shown in FIG.
4a to 24d are stretched to increase the spring force to receive the seat cushion with a large spring force, and the seat becomes hard.
Conversely, when the motor 25b is driven in the opposite direction, the rotating shaft 25a rotates clockwise,
The seat cushion is received with a small spring force by relaxing the spring force by relaxing a to 24d, and the seat becomes soft. each
The adjusted spring force of the springs 24a to 24d is
It is held by stopping the driving of the motor 25b.

As described above, in the seat, the rotation shaft 25a is rotated by the rotation of the rotation shaft 25a by the driving of the motor 25b, and the swing links 22a, 22a.
The spring force of the springs 24a to 24d stretched between b and 23a, 23b is changed, and the receiving force for receiving the seat cushion is adjusted. Such a nest force each swing
Acts to receive the entire seat cushion through the links 22a, 22b, 23a, 23b, and the cushioning properties of the seat cushion are uniformly adjusted throughout the seat cushion. As a result, the occupant can adjust the seat to the occupant's desired sitting comfort by adjusting the cushioning property. In this case, the springs 24a to 24d
22a, 22b, 23a, 23b
The cushion panel 1 is hung between the rotation shafts 25a.
3 is in a state of being stretched while maintaining an interval from the lower surface.
The seat cushion is extended by the springs 24a to 24d.
The spring 2 does not adversely affect the compression operation.
4a to 24d adversely affect the seat cushion
I can't.

In the seat, as shown in FIG. 5, each swing link 22a, 22b and 23a, 23
b, a plurality of locking holes 26 for each of the springs 24a to 24d.
a to 26d, and a plurality of engaging holes 27a to 27f in each engaging portion 25e of the rotating shaft 25a,
There is an advantage that the engagement position of each of the springs 24a to 24d can be appropriately changed, and the initial set value of the spring force of each of the springs 24a to 24d can be appropriately changed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a seat cushion constituting a seat and a supporting device for supporting the seat cushion according to an embodiment of the present invention.

FIG. 2 is a side view showing a state in which a cushion panel constituting the seat cushion is supported by a supporting device.

FIG. 3 is a side view showing a support state of the support device when a load acts on the seat cushion from above.

FIG. 4 is a side view showing a state where the spring force of the support device is increased.

FIG. 5 is a partially omitted side view showing a modification of the support device.

[Explanation of symbols]

11: cushion cover, 12: cushion pad, 1
3 Cushion panel, 20 Support device, 21 Support member, 21a, 21b Frame, 22 Front link mechanism, 22a, 22b Swing link, 23 Rear link mechanism, 23a, 23b Swing link, 24a ~ 24d: spring, 25: spring adjusting mechanism, 25b: motor, 25
c: rotating screw , 25d: moving nut .

Claims (1)

(57) [Scope of request for utility model registration] 1. A seat comprising a seat cushion connected to an upper swinging end of each link, which is swingably assembled at the front and rear portions of a support member, and received by the support member so as to be vertically movable,
The seat is a rotating member rotatably supported by the support member in the front-rear direction, a spring member hooked on a lower swing end of at least one of the rotating member and each of the links, and the rotating member . Operation means for rotating in the front-back direction
And the operating means is screwed to the screw member and the screw member.
And connected to the rotating member to rotate the screw member.
A nut member that moves more in the front-rear direction and the screw member
A variable cushioning seat comprising a rotating operation member for rotating .