JPH1142138A - Seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat device which can be reduced in cost and weight. SOLUTION: A cushion is supported in such a manner that it can move back and forth along its longitudinal direction and that the front and rear ends of the cushion can alternately move vertically about a horizontal roller shaft perpendicular to the longitudinal direction. The rear end 22 of the chsion is advanced and lowered respectively by first and second links 31, 32, and thus the cushion 20 is made to operate in conjunction with a seat device through simple constitution, thereby the device can be reduced in cost and weight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat device comprising a base member attached to an installation portion, and a backrest supported by a base member mounted on the base member.

[0002]

2. Description of the Related Art It is generally known that a seated occupant does not get tired even if he or she sits for a long time if a final stable posture is taken. The final stable posture means a stable posture that finally calms down when sitting down. In addition, the final stable posture is not always a good posture that is gentle to the occupant. Whether or not the seated person can take a good final stable posture largely depends on the relationship between the angle of the support surface of the backrest and the angle of the seat surface of the seat. That is, as the angle of the support surface of the backrest becomes deeper, it is necessary to lower the rear end of the seat cushion and raise the front end thereof. As a conventional seat device, there is a seat device in which a seat is linked to a reclining tilt of a backrest so that a seated person can take a good final stable posture. As an interlocking mechanism for interlocking the seat cushion, for example, a guide rail curved upward and curved on the base member, a pair of rollers at the front end and the rear end of the seat cushion, and a pair of rollers rollably fitted on the guide rail. In some cases, the seatback is pushed and pulled in the front-rear direction by a push-pull member on the back side.

[0003]

However, in such a conventional seat apparatus, the structure is complicated, which causes an increase in cost, and the number of parts is large, the weight is large, and there is a problem in reducing the weight. There was a problem of becoming. The present invention has been made in view of such a conventional problem, and allows the seat cushion to move forward and backward in the front-rear direction, and the front end and the rear end of the seat cushion around a horizontal axis perpendicular to the front-rear direction. Are alternately supported so that they can move up and down, and with two links, the rear end of the seat is advanced and lowered,
It is an object of the present invention to provide a seat device in which seat cushions can be linked with a simple configuration to reduce cost and reduce weight.

[0004]

The gist of the present invention to achieve the above object lies in the following inventions. [1] In a seat device (10a), a backrest (10) and a seat cushion (20) interlocking with a reclining tilt of the backrest (10) are supported on a base member (1) attached to an installation portion. The seat cushion (20) is capable of moving back and forth in the front-rear direction, and alternately vertically moving the front end and the rear end (22) of the seat cushion (20) around a horizontal axis orthogonal to the front-rear direction. An interlocking mechanism (30) supported by the base member (1) and interlocking the seat cushion (20) has a first link (31) and a second link (32). One link (31)
The base end is pivotally connected to the base member (1), and the second link (32) is rotatably connected to the base (10) at the base end, and is connected to the seat cushion. (2
0), a front end of the first link (31), and a front end of the second link (32) are rotatably connected to each other, and the interlocking mechanism ( 30)
When the backrest (10) reclines and tilts, the leading end of the first link (31) and the leading end of the second link (32) are moved to the rear end (2) of the seat cushion (20).
2) The seat device (10a) characterized in that the seat cushion (20) and the backrest (10) can support the occupant in a final stable posture by moving forward and downward.

[2] A seat device in which a base member (1) fixed to an installation portion supports a backrest (10) and a seat cushion (20) interlocked with a reclining tilt of the backrest (10). In (10a), the base member (1) has a front base part (2) and a rear base part (3), and the front base part (2) moves the seat cushion (20) forward and backward. A fulcrum roller (5) that supports the front end and the rear end (22) of the seat (20) alternately vertically so as to support the front end and the rear end of the seat tongue (20) alternately around a roller axis orthogonal to the front-rear direction; The front base (2) has a tension spring (7) for urging the front end of the seat cushion (20) in a direction of moving backward and downward, and the front seat (2) has a tension spring (7).
0) has a first link (31) and a second link (32).
The link (31) has its proximal end pivotally connected to the rear base (3), and the second link (32)
Has a base end pivotally connected to the backrest (10), and a rear end (22) of the seat cushion (20) and the first end.
Of the link (31) and the second link (3
The tip of (2) is rotatably connected to each other, and the interlocking mechanism (30) is configured such that when the backrest (10) reclines and tilts, the tip of the first link (31) and the second link (31) are tilted. The leading end of the second link (32) advances and lowers the rear end (22) of the seat cushion (20) against the biasing force of the tension spring (7), and thereby the seat cushion (20).
And a backrest (10) configured to support the occupant in a final stable posture.

Next, the operation of the invention described in each of the above items will be described. In the seat device (10a) described in [1], the seat cushion (2
The base member (0) is capable of moving back and forth in the front-rear direction and alternately vertically moving the front end and the rear end (22) of the tongue (20) about a horizontal axis orthogonal to the front-rear direction. Supported by 1). When the backrest (10) is in the upright position, the seat cushion (20) is retracted to the rear position.

When the backrest (10) is reclined and tilted from the standing posture, the base ends of the first link (31) and the second link (32) rotate, and the distal end of the first link (31). The front end of the part and the second link (32) advances and lowers the rear end (22) of the seat cushion (20) to advance the seat cushion (20) from the rear position to the front position, and to seat the seat cushion (20). Raise the front end of the. Thereby, the seat cushion (20) and the backrest (10) can support the seated person in a good final stable posture. That is, the rear end (22) of the seat cushion (20) can be pushed and pulled and moved up and down by the action of the two links.

[0008] In the seat device (10a) according to the item [2],
In the seat device (10a) of this section, the seat cushion (2
0) so as to be able to advance and retreat in the front-rear direction, and to support the front end portion and the rear end portion (22) of the tongue (20) seated around a horizontal axis orthogonal to the front-rear direction so as to be movable up and down alternately. , A fulcrum roller (5). The front end of the seat cushion (20) is urged by a tension spring (7) in a direction to move backward and downward.

When the backrest (10) reclines and tilts, the distal end of the first link (31) and the distal end of the second link (32) sit against the urging force of the tension spring (7). The back end (22) is advanced and lowered, and the seat cushion (20) and the backrest (10) support the occupant in a good final stable posture. By the function of the fulcrum roller (5) having a simple structure, the seat cushion (20) can perform an advancing and retreating operation and an up-and-down operation of alternately moving both ends thereof up and down. In comparison, each operation can be performed smoothly with less frictional resistance. Further, the seat cushion (20) can be restrained at each position without backlash by the urging force of the tension spring (7).

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Each drawing shows an embodiment of the present invention. FIG. 1 is a side view of a main part of a seat device according to an embodiment of the present invention. FIG. 2 is a front view of the seat device. FIG. 3 is a side view of the seat device. FIG.
FIG. 3 is a plan view of the seat device. FIG. 6 is a front view of a main part of the seat device.

As shown in FIG. 1 to FIG. 4 and FIG. 6, the seat device 10a is for two persons and is arranged in a large number on the floor of a vehicle. A dedicated armrest is provided on both sides of the seat device, and a common armrest is provided in the center. An installation portion, which is a pedestal, is fixed to the floor, a pedal is provided in the installation portion, and the seat device is released from restraint by pedal operation, and the seat device is rotatable about a vertical axis. The base member 1 is fixed to the installation part. The base member 1 is a frame base, the base member 1 is a front base member 2 which is a front frame formed by a pipe member, a rear base member 3 which is a rear frame also formed by a pipe member,
Both ends of the front base member 2 and the rear base member 3 are provided with both side frames (not shown) which are respectively installed.

A support arm 3a is fixed to the rear base member 3, and a back arm 14 of the backrest 10 is rotatably supported by a pivot 3b fixed to the support arm 3a. The auxiliary bracket 14a is fixed to the
Shaft member 14b of back arm 14 and auxiliary bracket 14a
Has been erected. The backrest 10 is pivotally supported by the pivot 3b so as to be tiltable between a standing posture and a reclining posture.

FIG. 5 is a plan view of a main part of a seat device according to an embodiment of the present invention. As shown in FIGS. 1, 5 and 6, a support bracket 4 is fixed to the front base member 2, and a fulcrum roller 5 is rotatably supported on the support bracket 4 and a brake roller 6 is rotatable. It is supported, and the brake roller 6 is in circumferential contact with the fulcrum roller 5.

On the fulcrum roller 5, a seat frame 25 having a U-shaped groove-shaped cross section of the seat cushion 20 is mounted. As a result, the seat frame 20 is placed on the fulcrum roller 5, and the seat cushion 20 is sent to the fulcrum roller 5 so as to be able to advance and retreat in the front-rear direction, and the fulcrum roller 5 is orthogonal to the front-rear direction. Tongue 20 around the horizontal axis that is the roller axis
The front end 21 (corresponding to the front end of the seat frame 25) and the rear end 22 (corresponding to the rear end of the seat frame 25) are alternately vertically movable. The support bracket 4 is formed with a fitting projection (not shown) for fitting into a groove of the seat frame 25 having a U-shaped groove-shaped cross section to prevent the support bracket 4 from rising. Further, one end of the tension spring 7 is connected to the front base 2, and the other end of the tension spring 7 is connected to the front end 21 of the seat 20. The front end 21 of the seat cushion 20 is urged by the tension spring 7 in a direction to move backward and downward.

An interlocking mechanism 30 for interlocking the seat cushion 20
Has a first link 31 and a second link 32. The base end 33 of the first link 31 is rotatably connected to the support bracket 3c of the rear base 3, and the base end 34 of the second link 32 is connected to the backrest 1 via the shaft member 14b.
0 is rotatably connected to the back arm 14.

A rear end bracket 22a is fixed to the rear end 22 of the seat cushion 20. Rear end bracket 22
a, the tip 35 of the first link 31 and the second
Of the links 32 are rotatably connected to each other by a rotating shaft 26 passing therethrough. That is, the interlocking mechanism 30 is a four-link mechanism including the base member 1, the back arm 14, the first link 31, and the second link 32.

When the backrest 10 is tilted from the standing posture to the reclining posture, the interlocking mechanism 30 moves the back arm 14
The distal end of the rear end bracket 22a, the distal end 35 of the first link 31, and the distal end 36 of the second link 32 are both displaced forward and downward, so that the rear end 22 of the seat cushion 20 is extended by a tension spring. 7, the seat cushion 20 and the backrest 10 are configured to be able to support the occupant in a favorable final stable posture.

In order to support the occupant in the final stable posture, the interlocking mechanism 30 is, for example, as shown in FIG. The seat surface is configured to have an inclination angle of 11 degrees with respect to the horizontal axis. As for the angle condition of the tilt angle of the seat cushion 20 with respect to the tilt angle of the backrest 10, many angle conditions can be obtained by synthesizing the results of some experiments on the seat support conditions. The angle condition of the inclination angle of the seat cushion 20 with respect to the inclination angle of the backrest 10 is continuous. In determining many intermediate angle conditions among the obtained many angle conditions, the slide may be performed from any one of the angle conditions.

Next, the operation of the present invention will be described. When the seat frame 25 of the seat cushion 20 is mounted on the fulcrum roller 5, the seat cushion 20 is sent to the fulcrum roller 5 and is capable of moving forward and backward. Further, by being placed on the fulcrum roller 5, the seat cushion 20 can move the front end portion 21 and the rear end portion 22 of the seat cushion 20 alternately up and down about a horizontal axis which is a roller axis of the fulcrum roller 5. Become. When the backrest 10 is in the upright posture, the distal end 35 of the first link 31 of the interlocking mechanism 30 and the second
The front end portion 36 of the link 32 is located at the rear end portion 2 of the seat cushion 20.
The second rotating shaft 26 is restrained at a position pulled backward and upward. Thereby, the seat cushion 20 is restrained at the rear position. At this time, the seat frame 25 of the seat cushion 20 is in a substantially horizontal posture indicated by a solid line in FIG.

When the backrest 10 is tilted from the standing posture to the reclining posture, the back arm 14 rotates around the pivot 3b, and the second link 32 is connected to the shaft member 14b provided between the back arm 14 and the auxiliary bracket 14a. The base end portion 34 is pushed, the front end portion of the rear end portion bracket 22a of the rear end portion 22 rotatably connected to each other by the rotation shaft 26, the front end portion 35 of the first link 31, and the second end portion. Of the link 32 is displaced forward and downward, whereby the seat cushion 20 advances from the rear position to the front position, and the rear end 22 of the seat cushion 20 descends, while the seat cushion 20 moves downward.
The front end rises.

Accordingly, the inclination angle of the backrest 10 and the inclination angle of the seat surface of the seat cushion 20 are adjusted to a predetermined angle condition (for example, as shown in FIG. (The inclination angle of the seat surface is 11 degrees with respect to the horizontal axis), and the seated person can be supported in a favorable final stable posture. That is, when the backrest 10 is reclined and tilted, the back arm 14, which is the second link pivotally supported by the pivot 3b on the base member 1 constituting the first link of the four-link mechanism, rotates, and the third and third arms are rotated. The distal ends 35 and 36 of the first link 31 and the second link 32, which are the four links, displace the rear end 22 of the seat frame 25 forward and downward.

At this time, the front end 21 of the seat cushion 20 is urged by the tension spring 7 in the direction of moving rearward and downward, that is, the rear end 22 of the seat frame 25 is urged rearward and upward. Therefore, the distal ends 35 and 36 of the first link 31 and the second link 32 displace the rear end 22 of the seat frame 25 forward and downward against the urging force of the tension spring 7. Become. Due to the urging force of the tension spring 7, the intermediate portion of the seat frame 25 of the seat cushion 20 in the front-rear direction is constantly pressed against the peripheral surface of the fulcrum roller 5, and the seat cushion 20 can be restrained at each position without play. By the function of the fulcrum roller 5, which is a simple structure, the seat cushion 20 can perform the forward and backward movement and the operation of alternately moving the two end portions 21 and 22 up and down. Therefore, the frictional resistance is small and each operation can be performed smoothly.

In the above embodiment, the lower wall of the groove outer wall of the seat frame 25 having the U-shaped groove-shaped cross section is shown mounted on the fulcrum roller 5, but the upper wall of the groove inner wall of the seat frame 25 is shown. May be placed on the fulcrum roller 5.

One end of the tension spring 7 is connected to the front base 2.
And the other end of the tension spring 7 is connected to the front end 21 of the seat cushion 20, but the present invention is not limited to this, and the backrest 10 is biased so as to be maintained in the upright posture. Needless to say, this should be done.

[0025]

According to the seat apparatus of the present invention, the seat cushion can be moved back and forth in the front-rear direction, and the front end and the rear end of the seat are alternately moved up and down around a horizontal axis perpendicular to the front-rear direction. The seat is supported as possible, and the rear end of the seat is moved forward and downward by the two links, so that the seat can be linked with a simple structure to reduce the cost and reduce the weight.

[Brief description of the drawings]

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

FIG. 2 is a front view of the seat device according to the embodiment of the present invention.

FIG. 3 is a side view of the seat device according to the embodiment of the present invention.

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

FIG. 5 is a plan view of a main part of the seat device according to the embodiment of the present invention.

FIG. 6 is a front view of a main part of the seat device according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base member 2 ... Front base member 3 ... Rear base member 3b ... Axis 4 ... Support bracket 5 ... Support roller 6 ... Brake roller 7 ... Tension spring 10a ... Seat device 10 ... Slut 14 ... Back arm 14a ... Auxiliary bracket 14b ... Shaft member 20... Seat cushion 21... Front end 22. The base end of the link 34 ... The base end of the second link 35 ... The front end of the first link 36 ... The front end of the second link

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Katsumi Tashiro 100, Maeda-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture

Claims (2)

[Claims] 1. A seat device comprising a base member attached to an installation portion supporting a backrest and a seat cushion linked to a reclining tilt of the backrest, wherein the seat cushion is capable of moving forward and backward in a front-rear direction, and A front end portion and a rear end portion of the seat cushion are supported by the base member so as to be able to move up and down alternately around a horizontal axis orthogonal to the front-rear direction. The interlocking mechanism for interlocking the seat cushion includes a first link. And a second link, wherein the first link has its base end pivotally connected to the base member, and the second link has its base end mounted on the back. The rear end of the seat, the front end of the first link, and the front end of the second link are rotatably connected to each other. When the shear reclines and tilts
The leading end of the first link and the leading end of the second link advance and lower the rear end of the seat, so that the seat and the backrest can support the seated person in the final stable posture. A seat device characterized by comprising: 2. A seat device comprising: a base member fixed to an installation portion supporting a backrest and a seat cushion interlocking with the reclining tilt of the backrest, wherein the base member includes a front base portion and a rear base. The front base portion supports the seat cushion so as to be able to advance and retreat in the front-rear direction, and alternately moves up and down the front end and the rear end of the seat cushion around a roller axis orthogonal to the front-rear direction. A fulcrum roller that movably supports the front base portion, the front base portion includes a tension spring that urges a front end of the seat cushion in a direction to move backward and downward, and an interlocking mechanism that interlocks the seat cushion includes a first interlock mechanism. And a second link, wherein the first link has its base end pivotally connected to the rear base, and the second link has its base end connected to the rear end. Pivotally connected to your back, front The rear end of the seat, the front end of the first link, and the front end of the second link are rotatably connected to each other, and the interlocking mechanism reclines and tilts the backrest.
The distal end of the first link and the distal end of the second link advance and lower the rear end of the seat against the urging force of the tension spring, and the seat and the backrest cause the seated person to move. A seat device configured to be supported in a final stable posture.