JP2003252102A - Vertically movable suspension device of vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertically movable suspension device of a vehicular seat for improving a seating feeling by securing the thickness of a cushion material by reducing the size while lowering the height of a mechanism part of the suspension device. <P>SOLUTION: This vertically movable suspension device S has a support part 11 arranged between the vehicular seat and a car body, and movably supporting the vehicular seat in the vertical direction by tilting and rising around a rotational fulcrum, and a torsion coil spring 13 for applying elastic force to the support part 11, and is constituted so that the support part 11 is provided with at least a first holding part 12a for holding the torsion coil spring 13 wound in the rotational direction of the support part 11 toward a support part 11 side end part from a coil part 13c along at least one of a front edge part or a rear edge part of the vehicular seat, and a second holding part 12c for holding the support part 11 side end part of the torsion coil spring 13 in a position for moving in the winding direction of the coil part 13c when the support part 11 tilts around the rotational fulcrum. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical movement suspension device for a vehicle seat, and more particularly to a vertical movement suspension device for a vehicle seat that has good performance and is downsized.

[0002]

2. Description of the Related Art Conventionally, various techniques have been proposed for a vertical movement suspension device for a vehicle seat.
For example, FIG. 13 shows a vehicle seat having a suspension device with a height mechanism, which is disclosed in Japanese Patent Laid-Open No. 10-129323. In the figure, (170) is a compression coil spring that biases the front portion of the upper frame (102) upward, (171) is an adjustment cam that adjusts the elasticity of the compression coil spring (170) integrally with the operation handle (171A),
Reference numerals (172) denote fixed cylinders that rotatably support the adjustment cam (171).

Link A that constitutes a suspension device
(130), link B (131), link C (13
2), the link D (not shown) is connected to the lower frame (10
The upper frame (102) ascends by pivoting around the pivotal portion with respect to 1) as the center of rotation, and the upper frame (102) descends as each falls forward. A vertical shock applied to the upper frame (102) is absorbed by a shock absorber (not shown) and the compression coil spring (170).

[0004]

However, in the above proposed technique, since the coil springs are provided vertically (or obliquely), there is a disadvantage in that the height is mechanically required and the device becomes large. It was

There is also known a suspension device in which a coil spring is horizontally arranged below a vehicle seat. The suspension device is arranged in the lower central portion of the vehicle seat so as not to largely project in the front-rear direction or the left-right direction from below the vehicle seat.

By using the suspension device having the above structure, it is possible to reduce the height of the mechanism portion. However, since the suspension device is arranged in the lower central portion of the vehicle seat, the space for disposing the suspension device is reduced. Therefore, there is a problem that the cushioning material of the vehicle seat is thinned and it becomes impossible to obtain a good seating feeling. Further, when the tension coil spring is used, there is a problem that a space for movement of the spring itself is required, resulting in an increase in size of the device.

An object of the present invention is to reduce the height of a mechanical portion of a suspension device and to make it compact, so that the cushioning material of a vehicle seat can have a sufficient thickness, thereby improving the seating feeling. A vertical seat suspension device is provided.

Another object of the present invention is to ensure an optimum suspension state according to the weight of an occupant,
An object of the present invention is to provide a vertical movement suspension device for a vehicle seat.

[0009]

The above-mentioned problems can be solved by using the vertically moving suspension device for a vehicle seat according to the present invention. That is, the vertical movement suspension device for a vehicle seat of the present invention is a vertical movement suspension device that elastically supports the vehicle seat in the up-down direction, and is disposed between the vehicle seat and the vehicle body. A support portion that tilts and stands around a dynamic fulcrum to support the vehicle seat in a vertically movable manner, and a torsion coil spring that applies an elastic force to the support portion are provided, and the support portion includes a coil portion. First to hold the torsion coil spring wound in the rotation direction of the support portion from the end to the end portion on the support portion side along at least one of a front edge portion and a rear edge portion of the vehicle seat. And a holding portion of the torsion coil spring and an end portion of the torsion coil spring on the supporting portion side at a position where the supporting portion moves in the winding direction of the coil portion when the supporting portion tilts around a rotation fulcrum.
And at least a holding portion of the.

More specifically, the first holding portion for holding the coil portion of the torsion coil spring is below the vehicle seat and extends from the support portion along the front edge portion of the vehicle seat. It is a shaft that extends.

As described above, according to the vehicle seat vertical movement suspension apparatus of the present invention, since the torsion coil spring is used, the torsion coil spring itself and a mechanism for transmitting a force to the torsion coil spring are provided. It can be arranged in the horizontal direction, and the device can be made thinner.

Further, in the vertical movement suspension device of the present invention, the shock absorber is arranged along the back portion of the vehicle seat, and the vehicle seat is driven by the elastic force of the torsion coil spring arranged on the front side of the vehicle body. The shock absorber disposed along the back of the vehicle seat to dampen the impact and vibration on the vehicle and absorb the load applied to the rear side of the vehicle seat, It is designed to reduce the impact of movement.

As described above, in the vertical movement suspension device of the present invention, the torsion coil spring and the shock absorber are used to effectively eliminate the impact and vibration on the vehicle. At this time, the torsion coil spring, Since all of the shock absorbers are arranged at positions avoiding the central portion of the vehicle seat, it is possible to increase the thickness of the vehicle seat in the portion where the occupant sits and improve the seating feeling. It will be possible.

Further, according to the configuration of the present invention, the shock caused by the vertical movement of the vehicle is immediately transmitted to and absorbed by the torsion coil spring without the use of a complicated link mechanism as in the prior art, so that the shock is absorbed. It will be possible to alleviate quickly.

Further, since the end portion of the torsion coil spring and the coil portion are held in close proximity to each other and the point of action is close to the coil portion, the transmission loss to the coil portion is minimized. Therefore, the impact can be reliably reduced.

A connecting member for transmitting the movement of the supporting portion to the supporting portion provided at another place is disposed on the supporting portion, and the plurality of supporting portions support the vehicle seat. Is configured to.

Further, in the vertical movement suspension device of the present invention, the torsion coil spring is connected to the adjusting means for applying tension in the winding direction to change the elasticity. More specifically, the adjusting unit includes an engaging member that is continuous with one end of the torsion coil spring, and a position changing unit of the engaging member.

The position changing means is arranged on the front side of the vehicle body with respect to the engaging member, and has a substantially L-shaped first member having one end connected to the engaging member, and the first member. A second member connected to the other end of the member and holding the other end movably in the left-right direction of the vehicle body. The second member may be movably arranged on a shaft portion arranged in the left-right direction of the vehicle body.

As described above, by providing the adjusting means for the torsion coil spring, the optimum suspension state can be secured according to the weight of the occupant. That is, when a heavy occupant is seated, the tension in the winding direction of the torsion coil spring is increased so that a large force is required to rotate the support piece, and the support portion operates excessively. By doing so, it is possible to prevent the occurrence of bottom feeling. On the contrary, when a light-weight occupant is seated, the tension of the torsion coil spring may be reduced.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention and can be variously modified within the scope of the gist of the present invention.

1 to 12 show one embodiment of the present invention. FIG. 1 is a perspective view of a vehicle seat, FIG. 2 is a sectional view of the vehicle seat, and FIG. 3 is an explanation of a vertical movement suspension device. FIGS. 4 to 8 are end views of main parts of the vertical movement suspension device, FIG. 9 is an explanatory view showing a cushioning member, FIG. 10 is a side view of the vertical movement suspension device, and FIG. 11 is a perspective view of main parts of the vertical movement suspension device. 12A and 12B are explanatory diagrams showing the display unit.

The vehicle seat 1, as shown in FIG. 1, is a seat used in, for example, an industrial vehicle. As shown in FIG. 2, the vehicle seat 1 is formed by disposing a cushion material 3 on a bottom plate 2 and covering the cushion material 3 with a skin material 4. Bottom plate 2
On the lower side of the front side of the vehicle body of the
A space K for arranging is provided.

The bottom plate 2 is made of a resin such as polypropylene. The cushion material 3 is made of, for example, polyurethane foam. Also,
As the skin material 4, for example, a material such as polyvinyl chloride resin leather or artificial resin leather is used. The bottom plate 2, the cushioning material 3, and the skin material 4 are not limited to the above materials, and other materials may be used.

The vertical movement suspension device S of this embodiment is provided between the vehicle seat 1 and the vehicle body (not shown), and has the suspension means 10 and the shock absorber 2.
0, the adjusting means 30 of the suspension means 10, and the cushioning member 40. The vertical movement suspension device S of this example is configured to have a suspension performance of a relatively low stroke (50 mm or less).

The suspension means 10 urges the vehicle seat 1 upward, and is arranged between the upper frame 15 and the lower frame 16 and the upper frame 15 and the lower frame 16 to form a support portion. Support piece 11,
The shaft 12 connected to the support piece 11, and the shaft 12
The torsion coil spring 13 attached to the main component is a main component.

The support piece 11 is composed of a pair of front support pieces 11a arranged in front of the vehicle seat 1 and a pair of rear support pieces 11b arranged behind the vehicle seat 1. There is. The front support piece 11a, as shown in FIG.
The lower side is formed to have a rounded shape.

The front side support piece 11a is constructed so that when the vehicle seat is loaded, the front side support piece 11a is tilted while the torsion coil spring 13 is being wound, and then restored by the elastic force of the torsion coil spring 13 to stand up. ing.

The front support piece 11a is connected to the lower frame 16 as shown in FIG. A collar 63 is arranged between the front side support piece 11a and the lower frame 16, and the front side support piece 11a is configured to rotate using a connecting portion with the lower frame 16 as a rotation fulcrum 11d. . Further, as shown in FIG. 10, the front side support piece 11a is connected to the rear side support piece 1 via a long connecting member 11c.
It is connected to 1b.

The rear support piece 11b is a substantially V-shaped member as shown in FIG. 10, and has a rear shaft (not shown).
Are linked to. The rear support piece 11b is the front support piece 1
It is configured to tilt or stand up according to the movement of 1a.

That is, when the front support piece 11a is tilted or erected, the connecting member 11c moves forward or backward. The movement of the connecting member 11c also tilts or erects the rear support piece 11b.

The front support piece 11a, as shown in FIG.
It is connected to the shaft 12a and the shaft 12b.
Both the shaft 12a and the shaft 12b move vertically when the front support piece 11a moves. A dry bearing 65 is interposed at a connecting portion between the shaft 12a and the upper frame 15.

The shaft 12a constitutes a first holding portion of the torsion coil spring 13, and the torsion coil spring 13
The coil portion 13c is provided. The coil portion 13c of the torsion coil spring 13 is provided from the coil portion 13c to the front support piece 11
The winding direction toward the end 13a on the a side is the front support piece 11
It is arranged so as to be the same as the rotation direction of a.

As shown in FIG. 11, the shaft 12a and the shaft 12b have the shaft 12a and the shaft 1 respectively.
A collar portion 12c as a second holding portion is provided so as to connect the 2b, and the torsion coil spring 13 is provided on the collar portion 12c.
The end portion 13a on the front support piece 11a side is connected.

The other end 13b of the torsion coil spring 13
Are held by the protruding portion 31 a of the bracket 31. As will be described later, the bracket 31 constitutes the adjusting means 30 of the suspension means 10, and is arranged so as to be movable in the front-rear direction with respect to the vehicle seat 1.

The end portion 13a of the torsion coil spring 13 is formed when the front support piece 11a is tilted around the rotation fulcrum 11d.
It is held at a position where it moves in the winding direction of the coil portion 13c.

When the front support piece 11a is tilted, the shaft 12a provided with the coil portion 13c descends toward the front of the vehicle body. At this time, the collar portion 12c holding the end portion 13a is the shaft 12a on which the coil portion 13c is arranged.
On the other hand, the position is changed in a state where it goes around from the rear side of the vehicle body to the front side. As a result, a force is applied to the torsion coil spring 13 in the winding direction, and an elastic force is generated.

As described above, the torsion coil spring 13 tries to restore from the normal state after being wound from the normal state. By the restoring force at this time, the front support piece 1
1a stands up again from the tilted state.

With the above construction, when the vehicle seat 1 is loaded due to the impact, vibration or seating of the occupant of the vehicle, the front support piece 11a is given elasticity by the torsion coil spring 13. However, when the vehicle seat 1 is tilted and the vehicle seat 1 is depressed by a predetermined amount, the front support piece 11a is again erected while being given elasticity by the restoring force of the torsion coil spring 13.

At this time, the front support piece 11a is connected to the connecting member 1.
Since it is connected to the rear support piece 11b via 1c,
The rear support piece 11b tilts and stands up according to the movement of the front support piece 11a. In this way, the cushioning property is imparted to the vehicle seat 1, and the impact generated in the vehicle is
The vibration is alleviated to improve passenger comfort.

In the torsion coil spring 13 of this example, a gap of 0.5 mm or more is provided in advance between the coils. This is to prevent generation of abnormal noise due to contact between the coils when the front support piece 11a is tilted and the coil portion 13c is further wound.

When the torsion coil spring 13 is further wound as described above, the torsion coil spring 1
In order to reduce the frictional resistance between the guide roller 1 and the shaft 12a, as shown in FIG.
4 are provided.

The guide roller 14 is rotatably arranged around the shaft 12a. When the torsion coil spring 13 moves and comes into contact with the guide roller 14,
Since it rotates about 2a, the generation of friction and noise between the torsion coil spring 13 and the shaft 12a are prevented.

The guide roller 14 of this example is made of polyacetal resin. As the material of the guide roller 14, a material having abrasion resistance and abrasion resistance such as nylon and fluororesin is used.

The shock absorbers 20 are arranged on the left and right along the back of the vehicle seat 1. The shock absorber 20, together with the suspension means 10, is configured to damp the impact and vibration generated in the vehicle and absorb the load applied to the rear support piece 11b.

As shown in FIG. 10, the shock absorber 20 includes a relatively movable concentric piston rod 2.
1. A cylinder 22 is provided, and a cushioning force is generated by suppressing the piston speed under the restriction of the flow of the working medium (oil) in the chamber of the cylinder 22, so that shock and vibration are damped. It is configured.

As described above, the vertical movement suspension device S of this embodiment includes the suspension means 10 on the front side of the vehicle seat 1 and the shock absorber 20 on the rear side of the vehicle seat. With the shock absorber 20, the vertical shock and vibration transmitted to the vehicle seat 1 are effectively alleviated. The suspension means 10 may be provided on the rear side of the vehicle seat 1.

Next, the adjusting means 30 of the suspension means 10 will be described. The adjusting means 30 of the suspension means 10 is capable of ensuring the suspension property according to the weight of the occupant by changing the tension of the torsion coil spring 13 in the winding direction.

Adjusting means 30 of suspension means 10
Is a bracket 31 as an engaging member that is engaged with the end portion 13b of the torsion coil spring 13, a joint member 32 as a first member connected to the bracket 31, and a second member connected to the joint member 32. Arm member 33 as a member of
And an operating portion 34 having a shaft portion 34b with which the arm member 33 is screwed, and a tubular member 35 in which the torsion coil spring 13 is disposed.

The bracket 31 is provided so as to be movable in the longitudinal direction of the vehicle body without being connected to the upper frame 15. The bracket 31 is connected to the joint member 32. The joint member 32 is a member formed in a substantially L shape, and is connected to the upper frame 15 at an L-shaped bent portion.

The joint member 32 and the upper frame 15 are
Is connected to the joint member 32 side via a dry bearing 65,
The joint member 32 is rotatably connected to the upper frame 15.

The joint member 32 is connected to the arm portion 33. The end of the arm portion 33 on the joint member 32 side is
As shown in FIG. 4, it is laminated by welding or the like to form a flat plate, and is rotatably connected to the joint member 32 by a screw 64.

As shown in FIGS. 3 and 5, the arm portion 33 is composed of a connecting portion 33a and a stay 33c, and an arm member 33b rotatably engaged with the stay 33c. The arm portion 33 is screwed to the shaft portion 34b of the operation portion 34 via the coupling portion 33a, and is configured to move on the shaft portion 34b.

The arm member 33b is a hollow elongated member, and as shown in FIG. 5, one end of the arm member 33b is engaged so as to sandwich the stay 33c. The arm member 33b and the stay 33c are connected by a bolt 61 and a nut 62, but a collar 6 is provided between the arm member 33b and the bolt 61.
3 is provided, and the arm member 33b is configured to be rotatable around the bolt 61.

As shown in FIG. 3, the arm member 33b is arranged so as to deviate from the shaft portion 34b of the operating portion 34 by a predetermined angle. Therefore, the arm member 33b
A side surface (not shown) of the above is provided with a notch (not shown) through which at least the shaft portion 34b can come in and out.

As shown in FIGS. 3 and 5, the operating portion 34 includes a dial portion 34a and a shaft portion 34b, and a rolling bearing 34c is arranged between the dial portion 34a and the upper frame 15. ing. The operation part 34 is configured such that the shaft part 34b is rotated by rotating the dial part 34a. Then, the arm portion 33 is configured to move on the shaft portion 34b by rotating the dial portion 34a of the operation portion 34.

In this example, a clip member 34d is provided at the tip of the shaft portion 34b, and the clip member 34d is engaged with a flange portion (not shown) extending from the upper frame 15 to prevent the shaft portion 34b from coming off. Is being pursued.

Around the tubular member 35, as shown in FIG. 6, a torsion coil spring 13 is arranged. The torsion coil spring 13 is disposed on the lower side of the vehicle body with a gap provided between the torsion coil spring 13 and the tubular member 35, and is configured to be able to cope with the deformation of the coil portion 13c.

The tubular member 35 is engaged with the shaft 12a. The tubular member 35, as shown in FIG.
It is connected to a guide spring 35a fixed to the upper frame 15 by welding or the like, and is elastically held by the upper frame 15. Then, when the bracket 31 and the torsion coil spring 13 move so as to be pulled toward the front side of the vehicle body, the bracket 31 and the torsion coil spring 13 are movable to the front side of the vehicle body within a predetermined range.

Here, the adjusting operation of the vertical movement suspension device S of the present invention will be described. First, a case where a heavy occupant is seated, that is, a case where the suspension is stiffened will be described. When the occupant rotates the dial portion 34a of the operation portion 34 in a predetermined direction, the shaft portion 34b of the operation portion 34 rotates. When the shaft portion 34b rotates, the arm portion 33 screwed to the shaft portion 34b moves on the shaft portion 34b toward the dial portion 34a.

When the arm portion 33 moves, the arm portion 33
The joint member 32 connected to is pulled toward the arm portion 33. As described above, when the arm portion 33 moves toward the dial portion 34a side of the operation portion 34, the joint member 32 also moves so as to be pulled toward the dial portion 34a side.

Since the joint member 32 is formed in an L shape, the side of the joint member 32 connected to the arm portion 33 is pulled so that the joint member 32 is bent with respect to the upper frame 15 at the L-shaped bent portion. And is rotated to move the end fixed to the bracket 31 toward the front side of the vehicle body. As a result, the bracket 31 moves so as to be pulled toward the front side of the vehicle body.

When the bracket 31 is pulled toward the front side of the vehicle body, the torsion coil spring 13 fixed to the bracket 31.
The end of is pulled forward. The torsion coil spring 13 is stretched forward together with the tubular member 35, and its shape is changed so that the coil portion 13c is wound.

As described above, the adjusting means 30 allows the coil portion 13c of the torsion coil spring 13 to be additionally wound in advance. Then, if the torsion coil spring 13 is additionally wound in this way, a larger load is required to tilt the support piece 11.

As described above, when the winding of the coil portion 13c of the torsion coil spring 13 is made hard by the adjusting means 30, it is suitable when a heavy occupant is seated. When a heavy occupant is seated, a large load is applied to the vehicle seat 1 and the support piece 11, and the support piece 11 is prone to tilt.

Therefore, as described above, the torsion coil spring 13
When tension is applied to the vehicle, when the vehicle seat 1 is subjected to a load due to the impact, vibration, or seating of the occupant, the support piece 11 does not operate excessively, and the feeling of bottoming is prevented. Is preferred.

A case in which the hardness of the suspension is adjusted in the opposite manner to that described above, that is, a case in which an occupant with a light weight sits down and is softened will be described. In this case, by rotating the operation portion 34 in the opposite direction, the arm portion 33 screwed to the shaft portion 34b moves on the shaft portion 34b in the right direction of FIG. 3, and the arm portion 33 is pushed out. And move.

Then, the joint member 32 and the bracket 31
Moves from the state of being pulled toward the front side of the vehicle body to the direction of returning to the original state. As a result, the torsion coil spring 13 also returns from the hard winding state of the coil portion 13c to the original state.

In this case, the tension of the torsion coil spring 13 is released, and the torsion coil spring 13 is easily bent, so that the front support piece 11a is easily tilted, and when there is an impact, the vehicle seat 1 moves up and down in accordance with the impact. However, it is particularly suitable when an occupant with a light weight is seated.

The adjusting means 30 of the suspension means 10 of the present example is provided with a display section 36 for displaying the weight so that the tension of the torsion coil spring 13 can be adjusted appropriately according to the weight of the occupant. There is.

As shown in FIG. 12, the display unit 36 is provided on the front side of the vehicle seat 1 and is provided with weight display scales such as 60 kg and 100 kg. Then, this scale is used for the protruding piece 3 provided on the stay 33c of the arm portion 33.
3d is configured to direct.

That is, the protruding piece 33d moves on the shaft portion 34b of the operating portion 34 together with the stay 33c of the arm portion 33 when the operating portion 34 is rotated.
According to the tension applied to the torsion coil spring 13, the corresponding scale is instructed.

Next, the vertical movement suspension device S of this example.
The cushioning member 40 constituting the above will be described. Buffer member 4
0 is made of an elastic body such as rubber, and as shown in FIG.
A head portion 40a and a leg portion 40b are provided so that the head portion 40a faces downward and in the tilting direction of the vehicle seat.
It is arranged on the rear support piece 11b. The cushioning member 40 is attached to the rear support piece 11b, for example, via a mounting bracket 40c as shown in the figure.

Since the cushioning member 40 is provided, when the front support piece 11a and the rear support piece 11b are tilted, the cushioning member 40 hits the vehicle body side and the vehicle seat 1 and the vehicle body contact each other. The shock is absorbed. Since the cushioning member 40 is directly disposed on the rear side support piece 11b that constitutes the suspension means 10,
The vehicle seat is moved in the tilting direction in accordance with the movement of the rear support piece 11b, and the impact is reliably mitigated.

In order to increase the elastic force of the cushioning member 40, a hollow portion may be provided inside the cushioning member 40. Further, as the cushioning member 40, other members such as a spring member other than rubber may be used.

The vehicle seat 1 may be slidable in the front-rear direction. In this case, a slide rail (not shown) is attached to the lower frame 16 so that the slide rail can slide between the slide rail attached to the vehicle body side. Then, by operating the lever 50 shown in FIG. 1, the slide and stop operations are performed.

In the vertical movement suspension device S of the present invention configured as described above, the vehicle seat 1 can be operated by the vehicle traveling on an uneven road surface or by the occupant sitting on the vehicle seat 1 with great force. When a vertical impact or vibration is generated, the front support piece 11a tilts while bending the torsion coil spring 13, and stands up by the restoring force of the torsion coil spring 13, and this is repeated to alleviate the impact and vibration. .

Further, the front side support piece 11a is a connecting member 11c.
Since it is connected to the rear side support piece 11b via, the rear side support piece 11b tilts and stands up according to the movement of the front side support piece 11a.

Further, the vertical movement suspension device S of this embodiment is provided with a shock absorber 20, and the shock absorber 20 damps the shock and vibration generated in the vehicle seat 1. In addition, shock absorber 2
0 means vehicle seat 1 by suspension means 10
The vertical movement of is also gradually attenuated. Further, the shock absorber 20 also absorbs the load applied to the rear support piece 11b.

Also, due to impact and vibration, the vehicle seat 1
Even when the vehicle descends vigorously, since the vertical movement suspension device S of this example includes the cushioning member 40, the cushioning member 40 is interposed between the vehicle seat 1 and the vehicle body, and the vehicle seat 1 and the vehicle body are separated from each other. Prevents collision and absorbs impact.

In this way, the shock and vibration generated in the vehicle are alleviated. Vertical movement suspension device S of this example
The suspension means 10 is provided on the front side of the vehicle seat 1, and the shock absorber 20 is provided on the rear side of the vehicle seat.
Also, since it is provided with the cushioning member 40 and the optimum suspension state can be secured according to the weight of the occupant, the vertical shock transmitted to the vehicle seat 1,
It is possible to effectively reduce the vibration.

Further, the vertical movement suspension device S of this example
Then, when there is an impact, since no link member or the like is interposed from the support pieces 11a and 11b to the torsion coil spring 13, and the action point is located near the coil portion 13c, the impact is immediately generated. Therefore, it is possible to provide a comfortable seating feeling.

Further, in the vertical movement suspension device S of this example, since the torsion coil spring 13 is horizontally arranged, it is not necessary to make the installation space K large in the height direction.
It is possible to ensure a sufficient thickness of the cushion material 3 of the vehicle seat 1.

[0083]

As described above, according to the vehicle seat vertical movement suspension device of the present invention, since the torsion coil spring is used, the force is transmitted to the torsion coil spring itself and the torsion coil spring. The mechanism can be arranged in the horizontal direction, and the device can be thinned.

Further, the elastic force of the torsion coil spring arranged on the front side of the vehicle body urges the vehicle seat upward, and the shock absorber arranged along the back portion of the vehicle seat impacts the vehicle. , The vibration is dampened and the load applied to the rear side of the vehicle seat is absorbed, so that the shock caused by the vertical movement of the vehicle is effectively mitigated. Further, since both the torsion coil spring and the shock absorber constituting the suspension device are arranged at positions avoiding the central portion of the vehicle seat, the vehicle seat can be made thicker and the seating can be improved. It is possible to improve the feeling.

Further, according to the configuration of the present invention, the shock due to the vertical movement of the vehicle is immediately transmitted to the torsion coil spring via the support piece and the shaft without using a complicated link mechanism as in the conventional case. Since it is absorbed as a result, it is possible to reliably absorb the shock.

[Brief description of drawings]

FIG. 1 is a perspective view of a vehicle seat according to the present invention.

FIG. 2 is a sectional view of a vehicle seat.

FIG. 3 is an explanatory diagram of a vertical movement suspension device.

FIG. 4 is an end view of a main part of a vertical movement suspension device.

FIG. 5 is an end view of a main part of the vertical movement suspension device.

FIG. 6 is an end view of a main part of the vertical movement suspension device.

FIG. 7 is an end view of a main part of a vertical movement suspension device.

FIG. 8 is an end view of a main part of the vertical movement suspension device.

FIG. 9 is an explanatory diagram showing a cushioning member.

FIG. 10 is a side view of the vertical movement suspension device.

FIG. 11 is a perspective view of a main part of a vertical movement suspension device.

FIG. 12 is an explanatory diagram showing a display unit.

FIG. 13 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

1 Vehicle seat 2 bottom plate 3 cushion material 4 skin material 10 Suspension means 11 Support pieces 11a front support piece 11b Rear support piece 12a, 12b shaft 12c collar part 13 Torsion coil spring 14 Guide roller 15 Upper frame 16 lower frame 20 shock absorber 21 piston rod 22 cylinders 30 Suspension means adjustment means 31 bracket 32 Joint member 33 Arm 34 Operation part 35 tubular member 36 Display 40 cushioning member 50 lever 61 Volts 62 nuts 63 colors 64 screws 65 dry bearing K Vertical suspension suspension installation space S Vertical movement suspension device

Claims (7)

[Claims] 1. A vertical movement suspension device for elastically supporting a vehicle seat in a vertical direction, the suspension device being disposed between the vehicle seat and a vehicle body and tilted and erected around a rotation fulcrum. The vehicle seat includes a support portion that supports the vehicle seat so as to be movable in the vertical direction, and a torsion coil spring that applies an elastic force to the support portion. The support portion faces the end portion on the support portion side from the coil portion. A first holding portion that holds the torsion coil spring wound in the rotation direction of the support portion along at least one of a front edge portion and a rear edge portion of the vehicle seat; At least a second holding portion that holds the end portion on the support portion side at a position that moves in the winding direction of the coil portion when the support portion is tilted around the rotation fulcrum is provided. Suspension of vertical movement of vehicle seat Down apparatus. 2. A first holding portion for holding a coil portion of the torsion coil spring is a shaft extending below the vehicle seat from the support portion along a front edge portion of the vehicle seat. The vertical suspension device for a vehicle seat according to claim 1, wherein the suspension device is vertically movable. 3. The vertical movement suspension device for a vehicle seat according to claim 1, wherein a shock absorber is arranged along a back portion of the vehicle seat. 4. The vehicle according to claim 1, wherein the support portion is provided with a connecting member for transmitting a movement of the support portion to a support portion provided at another place. Seat vertical movement suspension device. 5. The vertical movement suspension device for a vehicle seat according to claim 1, wherein the torsion coil spring is connected to an adjusting means for changing the elasticity by applying a tension in a winding direction. 6. The adjusting means includes an engaging member continuous to one end of the torsion coil spring, and a position changing means of the engaging member, the position changing means being more than the engaging member in the vehicle body. A substantially L-shaped first member that is disposed on the front side and has one end connected to the engaging member, and the other end of the first member that is connected to the other end. 6. A vertical movement suspension device for a vehicle seat according to claim 5, further comprising a second member that holds the vehicle so as to be movable in the left-right direction of the vehicle body. 7. The vertical movement suspension device for a vehicle seat according to claim 6, wherein the second member is movably arranged on a shaft portion arranged in the left-right direction of the vehicle body.