JP2013067328A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the linkage mechanism from projecting to the seat back, as the seat body 1 consists of the vehicle front side turnably with a central focus on the turning spindle prepared on the vehicle floor of the front lower part of a seat cushion 11, moreover, it is the seat for vehicle which can adjust the turning angle of the seat body by the linkage mechanism 9 prepared behind the turning spindle between the lower part of the seat cushion and the vehicles floor.SOLUTION: The link mechanism constitutes of four-bar link, and the third and the fourth links 4, 5 may be made small between the first link 2 fixed to the vehicle floor F and the second link 3 fixed to the main part of the seat, which is crooked and has joined together so that the area of the bonding is surrounded by the first to the fourth links. Moreover, the reclining mechanism 6 is formed in the bonding part of the third link and the fourth link.

Description

  The present invention relates to a vehicle seat configured such that a seat body can be rotated forward of a vehicle around a rotation shaft provided at a front lower portion of a seat cushion.

In a vehicle in which seats are arranged side by side in the front-rear direction of the vehicle and only one entrance / exit door is provided in the front-rear direction of the vehicle body, the door position is designed with priority on getting on and off the front seat, For this purpose, the front seat must be moved forward to secure a space for getting on and off the rear seat. Therefore, a general vehicle is provided with a so-called walk-in mechanism in which the seat back is tilted forward and the seat cushion is slid forward.
In order to achieve the same function with a simple configuration, the seat cushion and the seat back are not moved relative to each other, and the seat body is rotated forward with the front lower portion of the seat cushion as the center of rotation and the space behind the seat. A configuration that secures this is also considered. Such a configuration will be described with reference to FIG.
A pivot shaft B serving as a pivot center is provided at the front lower portion of the seat cushion A1, and a link mechanism C is provided behind the pivot shaft B. The link mechanism C includes a four-bar link mechanism including the vehicle floor F and the lower skeleton of the seat cushion A1, and by operating the link mechanism C, the seat cushion A1 and the seat back A2 are integrally rotated forward. Have been to.
The configuration shown in FIG. 8 is shown in Patent Document 1 below.

Japanese Utility Model Publication No. 6-60524

As is clear from FIG. 8, a part of the link mechanism C always protrudes rearward, and the protruded link mechanism C inhibits the comfortability and usability behind the seat, and inhibits the ability to get on and off the rear seat. There's a problem.
In view of such a problem, an object of the present invention is to prevent the link mechanism from protruding backward from the seat by forming the link mechanism without protruding backward from the seat.

The first aspect of the present invention is configured such that the seat body can be pivoted forward of the vehicle around a pivot shaft provided on the vehicle floor at the front lower portion of the seat cushion, and the lower portion of the seat cushion; A vehicle seat that is capable of adjusting a rotation angle of the seat body by a link mechanism provided behind the rotation shaft between the vehicle floor and the link mechanism is a seat cushion in a seating position. It is always located in front of the rear end.
According to the first invention, since the link mechanism is always located in front of the rear end of the seat cushion in the seating position, the link mechanism does not protrude into the space behind the seat, and the comfort and usability behind the seat are improved. When there is a rear seat behind the seat body, the passenger can get on and off.

According to a second aspect of the present invention, in the first aspect, the link mechanism is a four-bar link comprising first to fourth links, the first link is fixed to the vehicle floor, and the second link is on the lower surface of the seat cushion. The third link and the fourth link that are fixed and coupled to the first link by the pivot shaft at the front lower portion of the seat cushion, and coupled to the first link and the second link on the vehicle rear side from the pivot shaft are The connecting portion between the third link and the fourth link is bent and connected so as to reduce the area surrounded by the first to fourth links, and the connecting portion between the third link and the fourth link A reclining mechanism for selectively fixing the coupling angle is provided.
According to the second invention, the link mechanism for rotating the seat body forward and supporting it at an arbitrary position is constituted by the four-bar link, the first link fixed to the vehicle floor, and the second link fixed to the seat body. Since the third and fourth links are bent and connected so that the area surrounded by the first to fourth links is reduced, compared with the conventional case (in the case of FIG. 8). Thus, the link mechanism can be configured compactly. As a result, a configuration in which the link mechanism does not protrude into the space behind the seat can be easily realized. In addition, the comfortability and usability behind the seat can be improved, and when there is a rear seat, the passengers can get on and off.
In addition, since the reclining mechanism is provided at the coupling portion between the third link and the fourth link, where the angle change is large with respect to the change in the rotation angle of the seat body, the angle of the seat body can be reduced even if a general reclining mechanism is used. Can be adjusted.

According to a third aspect of the present invention, in the first aspect, the link mechanism includes a first link fixed to the vehicle floor, a second link fixed to the lower surface of the seat cushion, and a length that is always increased by a spring force. The first link and the second link can be pivoted in the vehicle front-rear direction by the pivot shaft at the lower front portion of the seat cushion. The damper is connected to each other, and the free ends extending to the rear side of the seat cushions of the first link and the second link are connected.
According to the third invention, since the rotation angle of the second link with respect to the first link can be adjusted by changing the length of the damper, the link mechanism is configured more compactly than in the conventional case (in the case of FIG. 8). be able to. As a result, a configuration in which the link mechanism does not protrude into the space behind the seat can be easily realized. In addition, the comfortability and usability behind the seat can be improved, and when there is a rear seat, the passengers can get on and off.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the link mechanism is provided to be biased at a center portion in the width direction of the seat body.
According to the fourth aspect of the invention, since the link mechanism is provided in the center portion in the seat width direction, there is a space on both sides in the width direction of the seat body, and when there is a rear seat, the rear seat occupant is in that space. Legs can be put in and the comfort of the rear seat occupant can be improved.

It is side explanatory drawing which shows the 1st Embodiment of this invention. It is front explanatory drawing of the said 1st Embodiment. It is the III-III sectional view taken on the line in FIG. It is operation | movement explanatory drawing of the said 1st Embodiment. It is side explanatory drawing which shows the 2nd Embodiment of this invention. It is front explanatory drawing of the said 2nd Embodiment. It is the VII-VII sectional view taken on the line in FIG. It is a side view of the prior art in this invention.

<First Embodiment>
In the first embodiment, the seat body 1 has a seat cushion 11 and a seat back 12 integrated with each other. In FIGS. 1 to 4, only the skeleton of the seat body 1 is shown, and the cushion is covered on the outer surface of the skeleton. The pad and the seat cover are not shown.
The seat body 1 is fixed to the vehicle floor F via a slide mechanism 7 and a link mechanism 9. The slide mechanism 7 is located at the lower part on both sides of the seat body 1 and allows the seat body 1 to slide in the front-rear direction with respect to the link mechanism 9. Therefore, the left and right slide mechanisms 7 and 7 are configured such that the upper rail 71 and the lower rail 72 are relatively slidable relative to each other, the upper rail 71 is fixed to the lower portion of the seat body 1, and the lower rail 72 is disposed on the upper portion of the link mechanism 9. It is fixed. 73 is a slide lever fixed so as to be swingable between the left and right lower rails 72, 72. When the swing lever 73 is swung up so that the front end of the slide lever 73 is lifted upward, each upper rail 71 and the lower rail are moved by the rear end. 72 is configured to unlock a slide lock (not shown) provided between the two.
Accordingly, the upper rail 71 and the lower rail 72 are locked so as not to be slid at all times, and when the slide lever 73 is operated, the lock is released and the seat body 1 is slidable in the front-rear direction with respect to the link mechanism 9. When the operation of the slide lever 73 is released at the position, the slide of the seat body 1 is stopped.

The link mechanism 9 is configured by a four-bar link including first to fourth links 2 to 5. The first link 2 is fixed to the vehicle floor F, the second link 3 is fixed to the slide mechanisms 7 and 7 integrated with the seat body 1, and the third link 4 and the fourth link 5 are connected to each other at the first part. -It is bent and combined so as to reduce the area surrounded by the fourth links 2-5.
Each of the first and second links 2 and 3 is a plate-like body having a width equivalent to that of the seat body 1, and joining pieces 21 and 21 extending to lower portions on both sides of the front side of the plate-like body of the first link, and the joining pieces. The joining pieces 31, 31 of the second link 3 provided corresponding to 21, 21 are coupled to each other by a pivot shaft 24 so as to be rotatable. Here, the plate-like body of the first link 2 extends from a position slightly behind the front end of the seat body 1 to the vicinity of the center position of the seat cushion 11 of the seat body 1. On the other hand, the plate-like body of the second link 3 extends from a position slightly behind the front end of the seat body 1 to a position slightly ahead of the rear end of the seat cushion 11 of the seat body 1. Further, the plate-like bodies of the first link 2 and the second link 3 are formed with bent portions 23 and 33 on both sides, and the strength of each plate-like body is increased. In addition, illustration of the rotating shaft 24 is abbreviate | omitted in FIG.
In the first embodiment, the rotation shaft 24 corresponds to the rotation shaft of the present invention, and the link mechanism of the present invention including the rotation shaft 24 is constituted by the link mechanism 9.

One end of the third link 4 is rotatably coupled to a bracket 32 projecting downward from a central lower portion in the width direction of the plate-like body of the second link 3. The fourth link 5 has one end rotatably coupled to a bracket 22 projecting upward at the center upper portion of the plate-like body of the first link 2 in the width direction. The position of the bracket 32 and the bracket 22 in the front-rear direction is slightly lower in the bracket 32 than in the bracket 22, but is substantially below the center of the seat cushion 11 at the same position.
The other ends of the third link 4 and the fourth link 5 are coupled to each other via a reclining mechanism 6. The reclining mechanism 6 is a general one similar to that used for adjusting the inclination angle of the seat back with respect to the seat cushion in the vehicle seat, and the relative angle between the third link 4 and the fourth link 5 is set to an arbitrary angle. It can be locked with. The lever for releasing the lock of the reclining mechanism 6 is not shown, but is provided around the seat body 1 so that it can be operated by an occupant seated on the seat body 1 or a person around the seat body 1. The lever and the reclining mechanism 6 are connected by a wire.

  With the above configuration, the seat body 1 can be arbitrarily adjusted in the front-rear position by the slide mechanism 7, and the forward tilt angle can be adjusted by the link mechanism 9. Adjustment of the slide mechanism 7 and the link mechanism 9 is performed in order to set the seat position of the seated person of the seat body 1 to a desired position, and there is a rear seat behind the seat body 1. When a passenger in the rear seat gets on and off from a door provided on the side, adjustment is also performed to move the seat body 1 forward in order to secure the boarding / alighting space. Even when there is no rear seat behind the seat body 1, even when it is desired to secure a space for loading luggage behind the seat body 1, the seat body 1 is adjusted by adjusting the slide mechanism 7 or the link mechanism 9. Moving forward is done.

In FIG. 4, the position of the seat body 1 indicated by 1A is a seat position corresponding to a general seating position taken when the vehicle travels. 1C adjusts the link mechanism 9 from the position of 1A to move the seat body 1 backward. 1B indicates a state in which the second link 3 of the link mechanism 9 is pivoted largely forward with respect to the first link 2 and the seat body 1 is tilted forward. In this embodiment, the position of 1B shows a case where the seat body 1 is tilted forward in order to improve the ease of getting on and off the rear seat when there is a rear seat behind the seat body 1.
In order to realize the positions of the seat main body 1 of 1A to 1C, the reclining mechanism 6 is unlocked and the coupling angle between the third link 4 and the fourth link 5 is changed. As a result, the first link 2 This is done by changing the coupling angle of the second link 3 with respect to.
In order to easily change the position of the seat body 1 to the seat positions 1A to 1C, a spring force is set in a direction in which the second link 3 is rotated forward with respect to the first link 2. It is desirable. Accordingly, when the seat body 1 is rotated forward, the occupant only lifts his / her body from the seat body 1 and the seat body 1 is rotated forward by the spring force and the seat body 1 is rotated backward. The occupant simply puts his / her body on the seat body 1 and the seat body 1 is rotated backward against the spring force. The spring at this time is provided between the joining pieces 21, 21 of the first link 2 and the joining pieces 31, 31 of the second link 3, or between the third link 4 and the fourth link 5. 6 can be provided on both sides or on one side.

In the first embodiment, the link mechanism 9 is always positioned in front of the rear end of the seat cushion 11 in the seating position (corresponding to 1A in FIG. 4), so the link mechanism 9 is located in the space behind the seat body 1. It does not protrude, can improve the comfortability and usability behind the seat, and when there is a rear seat behind the seat body 1, the passenger can get on and off.
Further, a link mechanism for rotating the seat body forward and supporting it at an arbitrary position is constituted by a four-bar link, and a first link 2 fixed to the vehicle floor F and a second link 3 fixed to the seat body 1 Since the third and fourth links 4 and 5 are bent and connected so that the area surrounded by the first to fourth links 2, 3, 4, and 5 is reduced, Compared with the conventional case (in the case of FIG. 8), the link mechanism 9 can be configured more compactly. As a result, a configuration in which the link mechanism 9 does not protrude into the space behind the seat can be easily realized.
In addition, since the reclining mechanism 6 is provided at the coupling portion between the third link 4 and the fourth link 5 with a large change in angle with respect to the change in the rotation angle of the seat body 1, the seat body can be used even if a general reclining mechanism is used. The angle of 1 can be finely adjusted.
Further, since the link mechanism 9 is provided in the center portion in the seat width direction, there is a space on both side portions in the width direction of the seat body 1, and when there is a rear seat, the rear seat occupant puts his / her foot in that space. It is possible to improve the comfortability of the rear seat occupant. 1, 3, and 4 show a leg portion P of an occupant seated on the rear seat, and it can be seen that the leg portion P can be inserted under the seat body 1.

<Second Embodiment>
In the second embodiment, a damper 8 is used in place of the third link 4 and the fourth link 5 (including the reclining mechanism 6) of the link mechanism 9 in the first embodiment. In the second embodiment, other configurations are the same as those of the first embodiment, and the same portions are denoted by the same reference numerals and the description thereof is omitted.
As is well known, the damper 8 is a combination of a damper mechanism and a spring, and the length of the damper 8 can be adjusted by selectively freeing the flow of fluid in the damper mechanism. When the length of the damper 8 changes, the angle of the second link 3 with respect to the first link 2 of the link mechanism 9 changes, and the angle of the seat body 1 is adjusted as in the case of the first embodiment.
An operation lever (not shown) for changing the length of the damper 8 is around the seat body 1 like the lever of the reclining mechanism 6 in the first embodiment, and there is a gap between the operation lever and the damper 8. They are connected by wires.
In the second embodiment, the rotation angle of the second link 3 with respect to the first link 2 can be adjusted by changing the length of the damper 8, so that the link mechanism 9 is compared with the conventional case (in the case of FIG. 8). It can be configured compactly. 5 and 7 show the legs P of the occupant seated on the rear seat, and it can be seen that the legs P can be inserted under the seat body 1 with their leg tips.

The present invention is not limited to the appearance and configuration described in the above embodiment, and various modifications, additions, and deletions can be made without changing the gist of the present invention. For example,
1. The present invention can also be applied to seats arranged in three rows in the longitudinal direction of the vehicle.
2. A pair of link mechanisms of the present invention may be provided at both ends in the width direction of the sheet.
3. The link mechanism of the present invention may be a combination of the link mechanism of the first embodiment and the link mechanism of the second embodiment. In this case, between the first link 2 and the second link 3 of the link mechanism 9, a link in which the third link 4 and the fourth link are coupled via the reclining mechanism 6 is provided, and a damper 8 is provided in parallel therewith. Will be provided. Moreover, since there is the reclining mechanism 6, the lock mechanism of the damper 8 can be made unnecessary. Thereby, when the lock of the reclining mechanism 6 is released and the angle of the seat body 1 is adjusted, a sudden movement in which the seat body 1 falls to the floor F side due to gravity can be suppressed by the damper function. Further, the seat body 1 can be rotated by the spring force of the damper 8 without providing a separate spring force to rotate the seat body 1 forward.
4). The first link 2 in each embodiment may also serve at least partially by the vehicle floor F. The second link 3 may also serve as at least part of the lower rail 72.
5. In each embodiment, the link mechanism including the rotation shaft is configured. However, the link mechanism can be configured independently of the rotation shaft.

DESCRIPTION OF SYMBOLS 1 Seat main body 11 Seat cushion 12 Seat back 2 1st link 24 Rotating shaft 3 2nd link 4 3rd link 5 4th link 6 Reclining mechanism 7 Slide mechanism 8 Damper 9 Link mechanism F Vehicle floor

Claims (4)

A seat body is configured to be pivotable forward of the vehicle around a pivot shaft provided on the vehicle floor at a front lower portion of the seat cushion, and between the lower portion of the seat cushion and the vehicle floor, A vehicle seat in which the rotation angle of the seat body can be adjusted by a link mechanism provided at the rear of the rotation shaft;
The vehicle seat according to claim 1, wherein the link mechanism is always in front of a rear end of a seat cushion in a seating position. In Claim 1, the link mechanism is a four-bar link consisting of first to fourth links,
The first link is fixed to the vehicle floor,
The second link is fixed to the lower surface of the seat cushion, and is coupled to the first link by the rotation shaft at the lower front portion of the seat cushion.
The third link and the fourth link coupled to the first link and the second link on the vehicle rear side with respect to the rotation shaft are configured such that a coupling portion between the third link and the fourth link is the first to the fourth links. Bent and joined to reduce the area surrounded by the fourth link,
A vehicle seat, wherein a reclining mechanism for selectively fixing a coupling angle between both links is provided at a coupling portion between the third link and the fourth link. The link mechanism according to claim 1, wherein the link mechanism is fixed to a vehicle floor;
A second link fixed to the lower surface of the seat cushion;
A damper that is always biased to increase the length with a spring force and can be locked at an arbitrary length,
Each of the first link and the second link is coupled to each other at the front lower portion of the seat cushion so as to be pivotable in the vehicle front-rear direction by the pivot shaft,
The vehicular seat, wherein the damper is connected to each free end extending to the rear side of the seat cushion of the first link and the second link. 4. The vehicle seat according to claim 1, wherein the link mechanism is provided biased at a center portion in a width direction of the seat body. 5.

Images