JPH0511076Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a suspension device for a seat used as a vehicle seat or the like.

[Prior Art] In order to obtain cushioning properties commensurate with the weight of the seated occupant, recent vehicle seats have been proposed in which a suspension device is interposed between the cushion portion of the seat and the floor of the vehicle body. has been done.

FIG. 2 shows an example of such a seat with a suspension device, in which a link mechanism is provided between the cushion part 2 of the seat 1 and the vehicle floor 4 to support the cushion part 2 in a vertically movable manner. 11 and a suspension body 12 are arranged.

More specifically, the suspension body 12 is
As shown in FIG. 3, it is provided with an upper housing 18a and a lower housing 18b, and is connected by a flexible rubber body 19 between the two housings 18a and 18b, and is formed into an approximately cup shape as a whole. There is. In addition, due to the bending deformation of the rubber body 19,
The upper housing 18a and the lower housing 18b are movable up and down relative to each other. Furthermore, a cap 18d is placed over the top of the upper housing 18a, and the top surface of the upper housing 18a is closed by the cap 18d. When the upper housing 18a is closed, a movable membrane 15 is stretched over the entire upper surface of the upper housing 18a, and an air-filled chamber 16 is formed between the movable membrane 15 and the cap 18d. Further, an air tank 17 is connected to this air filling chamber 16 through a pipe 5. This air tank 17 includes a cylinder 17a, a piston 1
7b, an adjustment screw member 17c, and a gauge 17d. And adjustment screw member 17
c, rotate the piston 17b to the cylinder 17.
By moving it vertically within a, a predetermined air pressure can be introduced from the air tank 17 into the air filling chamber 16. Note that the air pressure in the air enclosure chamber 16 at this time can be confirmed with the gauge 17d. On the other hand, below the movable membrane 15,
A liquid sealing portion 14 is formed in which a liquid such as oil is sealed. The inside of this liquid sealing part 14 is
The upper housing 18a is partitioned into two upper and lower chambers by a partition plate 18c disposed in the middle portion thereof.
An upper liquid chamber 14a is formed between the partition plate 18c and the movable membrane 15, and a lower liquid chamber 14b is formed below the partition plate 18c. Also,
A hole 3 is formed in the center of the partition plate 18c, and a movable plate 13 with an orifice 13a is attached to this hole 3, and liquid is passed between the upper liquid chamber 14a and the lower liquid chamber 14b through the orifice 13a. It is now available for distribution.

In the seat 1 configured in this way, the upper housing 18a is fixed to the frame 20 side of the cushion portion 2 via the cap 18d, and
The lower housing 18b side is attached to the vehicle body floor surface 4 side via the seat rail 21. When an impact is applied between the cushion portion 2 and the vehicle floor surface 4, the liquid passes through the orifice 13a and enters the upper liquid chamber 14.
Liquid flows back and forth between a and the lower liquid chamber 14b, mitigating and absorbing shocks and the like at this time. This operation will be explained next.

First, between the cushion part 2 and the vehicle floor surface 4,
When no impact load W (see Fig. 3) is applied, the upper housing 18a and the lower housing 18
b are vertically separated until the pressure in the upper liquid chamber 14a and the pressure in the lower liquid chamber 14b are balanced. As a result, link mechanism 1
It extends between the frame 20 of 1 and the seat rail 21, and supports the cushion part 2 in a largely lifted state. Further, the liquid pressure in the upper liquid chamber 14a and the air pressure in the air chamber 16 are balanced, and the movable membrane 15 is maintained in a simply floating state.

Next, in this state, the cushion part 2 and the vehicle floor surface 4 are
When an impact load W is applied between the upper housing 18a and the lower housing 18b, a compressive force is applied between the upper housing 18a and the lower housing 18b. Then, a force is generated that causes the liquid in the lower liquid chamber 14b to flow into the upper liquid chamber 14a through the oriSwiss 13a. Then, when the liquid flows into the upper liquid chamber 14a side, the upper liquid chamber 14
The pressure on the a side increases, this pressure compresses the air in the air enclosure chamber 16, and the movable membrane 15 moves into the air enclosure chamber 16.
Inflated to the side. Furthermore, the liquid in the lower liquid chamber 14b side escapes to the upper liquid chamber 14a side, thereby reducing the distance between the upper housing 18a and the lower housing 18b, and at the same time, the link mechanism 11 is also compressed. As a result, the cushion portion 2 is displaced downward and the impact force is absorbed. On the other hand, when the movable membrane 15 receives a repulsive force from the air-filled chamber 16 side that displaces the cushion part 2 upward after the cushion part 2 is displaced downward, the liquid in the upper liquid chamber 14a is compressed, and the liquid in the upper liquid chamber 14a is compressed. flows into the lower liquid chamber 14b through the orifice 13a again. Then, while bending the rubber body 19, the upper housing 18a
is displaced upward with respect to the lower housing 18b,
The cushion part 2 is displaced upward while extending the link mechanism 11. This absorbs the impact force received from the vehicle floor surface 4 side. That is, the upper liquid chamber 14a and the lower liquid chamber 1 pass through the orifice 13a.
4b, the impact force generated between the cushion portion 2 and the vehicle floor surface 4 is absorbed, thereby providing cushioning properties. At this time, the cushioning property can be adjusted by the air pressure in the air chamber 16, and this adjustment can be achieved by changing the position of the piston 17b in the cylinder 17a by rotating the adjusting screw member 17c. It can be adjusted according to the weight and preferences of the seated occupant.

Further, in the suspension body 12 of the seat 1, the initial load and minute vibrations are absorbed by the movement of the movable plate 13 disposed within the hole 3 of the partition plate 18c. This movable plate 13 is supported in the hole 3 so as to be movable up and down, and flanges 13 are provided at the upper and lower ends of the movable plate 13.
c and 13d are provided, respectively. Further, the amount of vertical movement of the movable plate 13 is determined by
d is regulated by colliding with the upper or lower surface of the partition plate 18c. And the upper liquid chamber 14
a. When pressure is generated in the lower liquid chamber 14b and the liquid moves through the orifice 13a, this movable plate 13 instantly moves upward or downward, respectively;
This movement absorbs the initial load and minute pressure fluctuations.

[Problems to be Solved by the Invention] However, in this conventional seat suspension device, the air pressure inside the air chamber 16, which can change the cushioning property, can be adjusted by rotating the adjusting screw member 17c. This is done by reciprocating the piston 17b by feeding the screw 17c. However, this rotation operation is done manually and by gradually screwing in the screws. Therefore, the operability is poor. For this reason, when adjusting the air according to the weight of the person sitting, it is time consuming and troublesome, so many people force themselves to sit down without making adjustments.
There was a problem that made the seat uncomfortable.

The present invention was devised in view of the above-mentioned problems, and its purpose is to provide a suspension device for a seat that has a structure that allows the cushioning properties to be easily adjusted according to the preferences of the seated person to improve sitting comfort. Our goal is to provide the following.

[Means for Solving the Problems] In order to achieve the above object, a seat suspension device according to the present invention includes a suspension body interposed between a cushion portion of a seat and a floor surface, and A liquid sealing section in which the housing body is partitioned into two upper and lower chambers by a partition plate, and the upper and lower chambers are connected by an orifice; an air sealing chamber formed in one chamber of the liquid sealing section via a movable membrane; and the air sealing chamber. A seat suspension device comprising an air tank consisting of a cylinder and a piston that can adjust the amount of air filled into a chamber, the seat suspension device having a reciprocating lever and a reciprocating lever that controls the reciprocating movement of the piston. It is equipped with conversion means for converting the movement into movement.

[Operation] According to this configuration, when the reciprocating lever is rotated, the rotation of the reciprocating lever is converted by the conversion means into an operation of reciprocating the piston. Therefore, the piston is moved simply by rotating the reciprocating lever, and the amount of air sealed in the air filling chamber can be changed in accordance with the amount of movement. Moreover, it can be operated with a small amount of force.

[Example] Hereinafter, an example of the present invention will be described in detail using the drawings.

FIG. 1 shows an embodiment of a seat suspension device according to the present invention. In FIG. 1, the same reference numerals as in FIGS. 2 and 3 indicate the same components as in FIGS. 2 and 3. The suspension body 112 includes an upper housing 18a and a lower housing 18b, and is connected to the housings 18a and 18b by a flexible rubber body 19, so that the suspension body 112 has an approximately cup shape as a whole. An air chamber 16 is formed in the upper part of the upper housing 18a, and the middle part of the upper housing 18a is partitioned by a partition plate 18c to form an upper liquid chamber 14.
The basic structure, such as the formation of a lower liquid chamber 14a and a lower liquid chamber 14b, is the same as the conventional suspension body 12 shown in FIG.
The structure of the air pressure adjusting means 30, which changes the air pressure by adjusting the amount of air sealed into the air chamber 6, is different.

To explain further, an air tank 31 is connected to the inside of the air filling chamber 16 via a pipe 5.
This air tank 31 consists of a cylinder 31a and a piston 31b, and the piston 31b is reciprocated within the cylinder 31a, so that the amount of air sealed into the air filling chamber 16 can be adjusted depending on the position of the piston 31b. The cylinder 31a is the seat 1
The piston 31b is connected to a converting means 33.

The converting means 33 includes a support shaft member 34, an intermediate rotation member 35, an intermediate lever 36, and the like. Further, the support shaft member 34 has one end connected to the piston 3.
1b, and a connecting member 37 is attached to the other end. This connecting member 37 is formed in a substantially U-shape, and has elongated holes 37a on both left and right sides.
is formed. The intermediate portion of the intermediate rotating member 35 is inserted between the left and right side surfaces of the connecting member 37, and the pin 38 implanted in the intermediate rotating member 35 is engaged with the elongated hole 37a. On the other hand, the intermediate rotating member 35 has the auxiliary frame 32 passed through a through hole 35a formed at one end.
It is rotatably supported by this auxiliary frame 32. Further, a through hole 35b is provided at the other end of the intermediate rotating member 35, and this through hole 35b
One end of an intermediate lever 36 is linked to the intermediate lever 36 . The other end of the intermediate lever 36 is linked to a through hole 39a formed at one end of the reciprocating lever 39. This reciprocating lever 39 is
An operating arm portion 39b is provided at the other end, and an auxiliary frame 32 is passed through a through hole 39c formed in the middle portion, and is rotatably supported by the auxiliary frame 32.

In this air pressure adjusting means 30, when a seated person or the like holds the operating arm portion 39b and turns it in the direction of arrow A in FIG. 1, the entire reciprocating lever 39 is rotated in the direction of arrow A. At this time, the intermediate lever 36 is also moved in the direction of arrow C in the figure, and
The intermediate rotating member 35 is rotated in the direction of arrow E in the figure, and at the same time, the piston 31b and the support member 34 are moved integrally with the piston 31b in the direction of arrow H in the figure. As a result, the air in the air chamber 16 is returned to the air tank 31, and the amount of air sealed in the air chamber 16 can be reduced. Conversely, when the operating arm portion 39b is rotated in the direction of arrow B in the figure, the entire reciprocating lever 39 is rotated in the direction of arrow B in the figure. At this time, the intermediate lever 36 is also moved in the direction of arrow D in the figure, and the intermediate rotating member 35
is rotated in the direction of arrow F in the figure, and at the same time, the support shaft member 34 is moved integrally with the piston 31b in the direction of arrow G in the figure. As a result, air is sent into the air filling chamber 16 from inside the air tank 31, and the amount of air sealed in the air filling chamber 16 can be increased.

In the seat suspension device including the suspension body 112 provided with the air pressure adjusting means 30 configured as described above, when a load fluctuation occurs between the cushion portion 2 and the vehicle floor surface 4 due to an impact, etc. When the load changes, a difference occurs between the pressure in the upper liquid chamber 14a and the pressure in the lower liquid chamber 14b.
At this time, the movable plate 13 instantly moves to the side of the chamber where the pressure is lower, and the initial load is absorbed. In addition, even slight vibrations are absorbed by the movement of the movable plate 13, but if the load fluctuation is even larger, it is absorbed by the liquid entering the chamber on the opposite side through the orifice 13a. . In the structure of this suspension device, when a seated person or the like rotates the reciprocating lever 39, the position of the piston 31b within the cylinder 31a can be changed in accordance with the direction and amount of this rotation. Further, by this movement, the amount of air filled in the air filling chamber 16 is adjusted, and the cushioning properties obtained by the suspension body 112 can be changed according to the preference of the seated person. Moreover, in this adjustment operation, it is only necessary to grasp the reciprocating rotation lever 39 by hand and rotate it in the vertical direction, so it can be easily operated with a small force. This results in
The operability is improved, and cushioning properties according to the preferences of the seated person can be easily obtained.Although the above embodiment has been described with respect to a structure applied to a vehicle, it can also be applied to a general seat.

[Effect of the invention] As explained above, according to the seat suspension device according to the invention, when the reciprocating lever is rotated, the rotation of the reciprocating lever causes the conversion means to reciprocate the piston. is converted to Therefore, the piston is moved simply by rotating the reciprocating lever, and the amount of air sealed in the air filling chamber can be changed in accordance with the amount of movement.
Moreover, it can be operated with a small amount of force. This improves operability, makes it easy to obtain cushioning that matches the preferences of the seated person, and improves practicality.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional side view showing the main parts of a seat suspension device according to an embodiment of the present invention, and FIG. 2 is a side view showing an example of a seat to which a general suspension device is applied. FIG. 3 is a schematic sectional view showing an example of a conventional suspension device. 1... Seat, 2... Cushion part, 4... Floor surface, 12, 112... Suspension body, 13a
...Orifice, 14...Liquid sealing part, 14a...
...Upper liquid chamber, 14b...Lower liquid chamber, 15...Movable membrane, 16...Air enclosure chamber, 31...Air tank,
31a...Cylinder, 31b...Piston, 33
... Conversion means, 39 ... Reciprocating rotation lever.

Claims (1)

[Scope of utility model registration request] a liquid containing part comprising a suspension body interposed between a cushion part of a seat and a floor surface, said suspension body being partitioned into two upper and lower chambers by a partition plate, and said upper and lower two chambers being connected by an orifice; A suspension device for a seat, comprising an air chamber formed in one chamber of the liquid chamber through a movable membrane, and an air tank consisting of a cylinder and a piston that can adjust the amount of air sealed in the air chamber. 1. A seat suspension device comprising a reciprocating lever and a conversion means for converting rotation of the reciprocating lever into reciprocating movement of the piston.