JP2010241254A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance getting on/off performance when an occupant gets on/off while ensuring a holding property of a seat cushion. <P>SOLUTION: In the vehicle seat, the seat cushion 43 provided on a seat frame 41 can be lifted relative to the seat frame 41 by action of a cushion lifting mechanism 50. The seat cushion 43 includes cushion central parts 432, 433; and a cushion side part 431 positioned at a doorway side of the vehicle relative to the cushion central parts 432, 433. The cushion lifting mechanism 50 is constituted so as to lift the cushion central parts 432, 433 relative to the cushion side part 431 and the seat frame 41. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle seat configured such that a seat cushion provided on a seat frame can be moved up and down with respect to the seat frame by a function of a cushion lifting mechanism.

A vehicle seat related to this is described in Patent Document 1.
The vehicle seat described in Patent Document 1 is intended to reduce the burden when a passenger gets into a passenger car having a low vehicle height. That is, the vehicle seat has a damper that raises the seat cushion to an upper limit position (alighting / alighting position) with respect to a seat frame, and when the seat cushion is lowered to a seating position against a biasing force of the damper, A locking mechanism that locks against the seat frame.
When the occupant is seated on the seat cushion at the upper limit position, the seat cushion slowly descends against the urging force of the damper with the weight of the occupant and moves to the seating position. Thereby, the burden on the body when the passenger gets into the passenger car is reduced. Then, when the seat cushion is lowered to the seating position, the seat cushion is locked with respect to the seat frame.
Here, unlocking of the lock mechanism is performed in a state where the door of the passenger car is open and no occupant is seated on the seat cushion.

JP 2007-237804 A

  As shown in FIG. 5, a passenger seat cushion generally includes a cushion central portion 101, a cushion left side portion 103, and a cushion right side portion 105. In order to improve the holdability of the seat cushion, the seating surface 103s of the cushion left side portion 103 is inclined so as to be higher on the left end side, and the seating surface 105s of the cushion right side portion 105 is inclined so as to be higher on the right end side. is doing. That is, the seat cushion 100 is formed so that the left and right end portions are higher than the center portion. For this reason, when the occupant sits on the seat cushion 100 with the seat cushion 100 held at the upper limit position (alighting position), it is necessary to get over the left end portion or the mountain-shaped portion of the right end portion of the seat cushion 100. There is a problem that it is difficult to get on.

  The present invention has been made in order to solve the above-mentioned problems, and the problem to be solved by the present invention is to improve the boarding / alighting performance when the passenger gets on and off while ensuring the holdability of the seat cushion. is there.

The above-described problems are solved by the inventions of the claims.
The invention according to claim 1 is a vehicle seat configured such that a seat cushion provided on a seat frame can be lifted and lowered with respect to the seat frame by a function of a cushion lifting mechanism, and the seat cushion is a cushion central portion. And a cushion side portion located on the vehicle entrance / exit side of the cushion central portion, and the cushion lifting mechanism can lift and lower the cushion central portion relative to the cushion side portion and the seat frame. It is comprised as follows.

  According to the present invention, the cushion central portion can be lifted and lowered with respect to the cushion side portion and the seat frame by the function of the cushion lifting mechanism. That is, when the cushion central part rises, the occupant's buttocks are lifted, and the burden on the occupant's body is reduced when the passenger gets off. Further, the cushion central part rises when the passenger gets on and off, so that the cushion side part descends with respect to the cushion central part. For this reason, even if the seat cushion is configured such that the cushion side portion is higher than the cushion central portion in consideration of holdability, the cushion side portion is in the state where the cushion central portion is raised and the It will not get in the way of getting on and off. Therefore, the boarding / alighting performance of the vehicle seat is improved.

  According to the invention of claim 2, the frame side connecting portion that connects the edge side edge of the cushion side portion to the seat frame in a state in which the edge can be turned up and down, and opposite to the edge side edge of the cushion side portion. It has a center side connection part which connects to the said cushion center part in the state which can turn up and down the edge of a side.

  For this reason, when a cushion center part raises with respect to a seat frame, the edge (center side edge) on the opposite side to the entrance / exit side edge of a cushion side part will raise with the said cushion center part. As a result, the cushion side portion pivots upward about the frame side connecting portion, and the seating surface of the cushion side portion is inclined in a direction in which the entrance / exit side is lowered. This prevents the cushion side from getting in and out of the way. Furthermore, even if the cushion central portion is raised, the seating surface of the cushion central portion and the seating surface of the cushion side portion are substantially continuous via the central side connecting portion, so that the appearance of the seat cushion does not deteriorate.

According to a third aspect of the present invention, there is provided a slide mechanism for sliding the seat frame along the passenger compartment floor, and a frame lifting mechanism for raising and lowering the seat frame relative to the passenger compartment floor.
For this reason, the position of the vehicle seat with respect to the passenger compartment floor can be adjusted by the slide mechanism and the frame lifting mechanism.
According to a fourth aspect of the present invention, when the lift switch is operated in a state where the door of the entrance / exit is open, the cushion lifting mechanism operates in a direction to raise the cushion central portion.
For this reason, the cushion lifting mechanism can be raised only when the occupant intends to get off the vehicle, and there is no problem that the cushion lifting mechanism is operated unexpectedly.

  According to the present invention, it is possible to improve the boarding / alighting performance when an occupant gets on and off while securing the seat cushion.

It is a model perspective view showing the vehicle seat which concerns on this Embodiment 1 of this invention. It is a model side view of the said vehicle seat. It is a cross-sectional view (III-III arrow cross-sectional view of FIG. 1) of the seat cushion portion of the vehicle seat. FIG. 4 is a schematic view taken along arrow IV-IV in FIG. 3. It is a model cross-sectional view of the seat cushion part of the conventional vehicle seat.

[Embodiment 1]
Hereinafter, the vehicle seat according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
Here, front and rear, left and right, and top and bottom in the figure correspond to front and rear, left and right and top and bottom of the vehicle seat.

<About the outline of the vehicle seat 10>
The vehicle seat 10 according to the present embodiment is a seat (driver's seat or the like) configured to be seated from the right direction through a right entrance and exit in a passenger car having a relatively low vehicle height.
As shown in FIGS. 1 and 2, the vehicle seat 10 includes a seat main body 30 including a seat cushion portion 40 and a seat back portion 60, and a front / rear slide mechanism that slides the seat main body 30 back and forth with respect to the passenger compartment floor F. 20 and an elevating mechanism 25 that elevates and lowers the seat body 30 with respect to the passenger compartment floor F.

<Fore-and-aft slide mechanism 20>
The front / rear slide mechanism 20 includes a pair of left and right lower rails 22 extending in the front-rear direction on the passenger compartment floor F, left and right upper rails 23 configured to be slidable in the front-rear direction along the left and right lower rails 22, and the upper rail 23 as the lower rail. 22 and a drive mechanism (not shown) for sliding back and forth. The lower rail 22 is a substantially C-shaped groove-shaped rail whose upper side is open, and the lower side of the front end portion and the lower side of the rear end portion are supported by the support material 21 as shown in FIG. It is fixed to the floor F. As shown in FIG. 3 and the like, the upper rail 23 is a plate-like rail formed in a substantially inverted T-shaped cross section, and the lower portion of the upper rail 23 is fitted to the lower rail 22 from the front end side or the rear end side. ing. In the state where the upper rail 23 is fitted to the lower rail 22, the upper rail 23 can slide along the lower rail 22 in the front-rear direction.
That is, the front / rear slide mechanism 20 corresponds to the slide mechanism of the present invention.

<About lifting mechanism 25>
The elevating mechanism 25 is a mechanism for elevating the seat frame 41 of the seat cushion portion 40 with respect to the left and right upper rails 23 of the front and rear slide mechanism 20, and as shown in FIG. 2 and the like, a pair of left and right front lift links 27, Similarly, it is composed of a pair of left and right rear lift links 28 and a drive mechanism (not shown) serving as a lift drive source. The pair of left and right front lift links 27 and rear lift links 28 are configured so that the seat frame 41 can be moved up and down in parallel with the left and right upper rails 23. One end portion (lower end portion) of the front lift link 27 and the rear lift link 28 is connected to the upper rail 23 in a state where it can be turned up and down, and the other end portion (upper end portion) is connected to the seat frame 41. On the other hand, they are connected so as to be rotatable up and down.
Here, the seat frame 41, the front lift link 27, and the rear lift link 28 are covered with a side cover 41c as shown in FIG. 2 and 3, the side cover 41c is omitted.
That is, the lifting mechanism 25 corresponds to the frame lifting mechanism of the present invention.

<About seat cushion part 40>
The seat cushion portion 40 constituting the seat body 30 includes the above-described seat frame 41, a seat cushion 43 provided on the seat frame 41, a cushion central portion 432 of the seat cushion 43, and the like (described later). It is comprised from the cushion raising / lowering mechanism 50 which raises / lowers with respect to.
Note that a lower end portion of a seat frame (not shown) of the seat back portion 60 is connected to the rear end portion of the seat frame 41 so as to be vertically rotatable.
As shown in FIG. 1 and the like, the seat cushion 43 includes a cushion central part 432, a cushion right side part 431, a cushion left side part 433, and a cushion rear end part 434. The cushion central part 432 and the cushion left side The part 433 is integrated as shown in FIG. The cushion right side portion 431 and the cushion rear end portion 434 are divided with respect to the cushion center portion 432 and the cushion left side portion 433. Furthermore, the outer skin constituting the seating surface 432s of the cushion central portion 432 and the outer skin constituting the seating surface 431s of the cushion right side portion 431 are connected to each other by sewing to form a connecting portion 430 extending in the front-rear direction.
That is, the cushion center portion 432 and the cushion left side portion 433 correspond to the cushion center portion of the present invention, and the cushion right side portion 431 corresponds to the cushion side portion of the present invention. Moreover, the connection part 430 of the seating surface 432s of the cushion center part 432 and the seating surface 431s of the cushion right side part 431 corresponds to the center side connection part of the present invention.

As shown in FIG. 3, the seating surface 432 s of the cushion central portion 432 is formed substantially flat, and the seating surface 431 s of the cushion right side portion 431 is inclined so that the right end side (the entrance / exit side) becomes higher. Is formed. Further, the seating surface 433 s of the cushion left side portion 433 is formed in an inclined state so that the left end side (vehicle compartment center side) becomes higher. As a result, the holdability when the occupant sits on the seat cushion 43 increases.
As shown in FIG. 3, a hinge member 57 is accommodated inside the seating surface 431 s so as to extend in the front-rear direction on the right end side (entrance / exit side) of the cushion right side portion 431. The hinge member 57 includes a shaft portion and a bearing portion that supports the shaft portion, and the bearing portion is fixed to the seat frame 41 by a bearing support member 58. The shaft portion of the hinge member 57 is fixed to the cushion right side portion 431. Accordingly, the cushion right side portion 431 can be rotated in the vertical direction around the hinge member 57.
That is, the hinge member 57 and the bearing support member 58 correspond to the frame side connecting portion of the present invention.

<About the cushion lifting mechanism 50>
As shown in FIGS. 3 and 4, between the seat frame 41 and the seat cushion 43 of the seat cushion portion 40, a cushion lifting mechanism that lifts and lowers the cushion central portion 432 and the cushion left side portion 433 relative to the seat frame 41 and the like. 50 is installed.
As shown in FIG. 3, the cushion elevating mechanism 50 includes a base plate 52 suspended and supported by the left and right seat frames 41, a pair of left and right cross links 53 installed on the base plate 52, and the cross links 53. And a drive mechanism 55 to be operated. As shown in FIG. 4, the cross link 53 is composed of a linear first link 53a and a second link 53b, and the central portions of both the links 53a and 53b can be rotated up and down by a connecting pin 53x. Linked in state. And as shown in FIG. 3, the base end part (lower end part) of the 1st link 53a is connected with the nut 55n of the drive mechanism 55 via the connection bar 54 extended in the left-right direction. Moreover, the front-end | tip part (upper end part) of the 1st link 53a is connected with the front side surface of the back surface iron plate 432x of the cushion center part 432 in the state which can be rotated up and down, as shown in FIG. Furthermore, the front end (lower end) of the second link 53b is connected to a protrusion 52s formed on the front upper surface of the base plate 52 so as to be vertically rotatable. Further, the base end portion (upper end portion) of the second link 53b can be turned up and down in a longitudinal long hole 432z formed in the rear side surface of the cushion central portion 432 (back surface iron plate 432x), and can be moved back and forth within a certain range. It is connected in the state.

The drive mechanism 55 of the cushion elevating mechanism 50 moves the proximal end portion (connecting bar 54) of the left and right first links 53a in the approaching direction or the separating direction with respect to the distal end portions (projecting portions 52s) of the left and right second links 53b. It is a mechanism for moving, and includes a feed screw 55b, a nut 55n, a motor 55m, and the like.
As shown in FIGS. 3 and 4, the feed screw 55 b of the drive mechanism 55 is positioned so as to extend in the front-rear direction at the center rear portion of the base plate 52, and the leading end portion of the feed screw 55 b is on the base plate 52. It is rotatably supported by a fixed bearing portion 55j. Further, a nut 55n fixed to the connecting bar 54 (see FIG. 3) is screwed into the feed screw 55b, and a base end portion of the feed screw 55b is connected to a speed reducer of the motor 55m. With the above configuration, when the feed screw 55b is rotated forward by the forward rotation operation of the motor 55m, the nut 55n is advanced along the feed screw 55b by the screw action, and the base end portion (the connecting bar 54) of the first link 53a is advanced. Thus, the second link 53b comes closer to the tip (projection 52s). Thereby, the left and right cross links 53 operate in a direction in which the cushion central portion 432 and the like are raised (see the two-dot chain line in FIG. 4).

Further, when the feed screw 55b is reversely rotated, the nut 55n is retracted along the feed screw 55b, the proximal end portion (connecting bar 54) of the first link 53a is retracted, and the distal end portion (projecting portion 52s) of the second link 53b. Get away from. Accordingly, the left and right cross links 53 operate in a direction in which the cushion central portion 432 and the like are lowered.
The cushion raising / lowering mechanism 50 operates in a direction in which the cushion central portion 432 and the like are raised when the right door of the vehicle seat 10 is opened and a raising switch (not shown) is operated. The cushion lifting mechanism 50 operates to lower the cushion central portion 432 and the like to the seating position when the door of the vehicle seat 10 is closed and a lowering switch (not shown) is operated. .

<Operation of the vehicle seat 10 according to the present embodiment>
First, the operation of the vehicle seat 10 will be described from the state where the occupant has been boarded. In this state, the cushion center portion 432 and the cushion left side portion 433 are held at the lower limit position (sitting position) with respect to the seat frame 41. That is, the seating surface 431 s of the cushion right side portion 431 is bilaterally symmetrical with the seating surface 433 s of the cushion left side portion 433 in a state where the right end side (entrance / exit side) becomes the highest as shown by the solid line in FIG. 3. It is positioned so that Thereby, the occupant holdability during driving can be ensured. Further, by operating the front / rear slide mechanism 20 and the elevating mechanism 25, the front / rear position of the seat body 30 can be adjusted in accordance with the physique of the occupant, and the height position of the seat body 30 can be further adjusted.

Next, when the occupant gets off after driving, the lift switch (not shown) is operated with the right door opened. Thereby, while the raising switch is operated, the motor 55m of the cushion raising / lowering mechanism 50 rotates in the forward direction, and the left and right cross links 53 operate in the direction of raising the cushion central portion 432 and the cushion left side portion 433. Thereby, a passenger | crew's buttocks are pushed up and the burden on the passenger | crew's body at the time of alighting is reduced.
When the cushion central part 432 and the cushion left side part 433 are lifted with respect to the seat frame 41 by the action of the cushion lifting mechanism 50, the cushion right side part connected to the cushion central part 432 via the connecting part 430 (see FIG. 3). The left end of 431 is pulled up. As a result, the cushion right side portion 431 changes upward so that the inclination of the seating surface 431s becomes lower on the entrance / exit side as shown by the two-dot chain line in FIG. For this reason, the cushion right side portion 431 does not get in the way when the occupant gets out of the vehicle. After the passenger gets off, the cushion central part 432 and the cushion left side part 433 are held at their height positions (boarding / alighting positions) (positions indicated by two-dot chain lines in FIG. 3).

  Further, when the passenger rides, the occupant can sit on the seat cushion 43 in the getting-on / off position, so that it is not necessary to bend the knee greatly, and the burden on the occupant's body is reduced. Then, after sitting, when the occupant closes the door and operates a lowering switch (not shown), the motor 55m of the cushion raising / lowering mechanism 50 rotates reversely, and the left and right cross links 53 lower the cushion central part 432 and the cushion left side part 433. Operate in the direction you want. As a result, the left end of the cushion right side portion 431 is lowered together with the cushion center portion 432, and the cushion right side portion 431 is rotated downward about the hinge member 57 so that the seating surface 431s becomes higher on the entrance / exit side. . When the cushion central portion 432 and the like are lowered to the lower limit position (sitting position) with respect to the seat frame 41, as shown by the solid line in FIG. 3, the seating surface 431s of the cushion right side portion 431 is highest on the right end side (entrance entrance side) In such a state that it is inclined, it becomes symmetrical with the seating surface 433 s of the cushion left side portion 433. Thereby, the hold property of the seat cushion 43 is ensured.

<Advantages of the vehicle seat 10 according to the present embodiment>
According to the vehicle seat 10 according to the present embodiment, the cushion central portion 432 and the like can be lifted and lowered with respect to the cushion right side portion 431 and the seat frame 41 by the action of the cushion lifting mechanism 50. That is, as the cushion central portion 432 and the cushion left side portion 433 are raised, the occupant's buttocks are lifted, and the burden on the occupant's body when getting off the vehicle is reduced. In addition, when the occupant gets on and off the cushion central portion 432 and the like, the seating surface 431 s of the cushion right side portion 431 is inclined in a direction in which the entrance / exit side is lowered. For this reason, even if the seat cushion 43 is configured such that the cushion right side portion 431 is higher than the cushion central portion 432 in consideration of the hold property, the cushion right side in a state where the cushion central portion 432 and the like are raised. The part 431 does not obstruct the passenger's boarding / exiting operation. Therefore, the boarding / alighting performance of the vehicle seat 10 is improved.
Further, even if the cushion central portion 432 and the like are raised, the seating surface 432s of the cushion central portion 432 and the seating surface 431s of the cushion right side portion 431 are substantially continuous via the connecting portion 430. Appearance does not deteriorate.
Further, the position of the seat body 30 relative to the passenger compartment floor F can be adjusted by the front / rear slide mechanism 20 and the frame elevating mechanism 25.
In addition, when the lift switch is operated in a state where the door of the entrance / exit is open, the cushion elevating mechanism 50 operates in a direction to elevate the cushion central portion 432 and the like. There is no such thing as operating.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in the present embodiment, in the vehicle seat 10 (driver's seat or the like) seated from the right direction through the right entrance, the cushion central part 432 and the cushion left side part 433 are integrally raised and lowered by the cushion raising / lowering mechanism 50. An example is shown. However, in the vehicle seat (passenger seat or the like) seated from the left through the left entrance, the cushion right side 431 is moved up and down integrally with the cushion central part 432. In this case, the cushion left side portion 433 corresponds to the cushion side portion of the present invention.
In the vehicle seat configured to be seated from both the left and right sides, the cushion central portion 432 is moved up and down independently.
Further, in the vehicle seat 10 according to the present embodiment, the cushion right side portion 431 and the cushion central portion 432 are connected by the connecting portion 430, and the seating surface 431s of the cushion right side portion 431 is inclined as the cushion central portion 432 is raised and lowered. An example of changing is shown. However, a configuration in which the connection between the cushion right side portion 431 and the cushion center portion 432 is released and the cushion right side portion 431 is fixed to the seat frame 41 side in a non-rotatable state is possible.
Furthermore, although the example using the cross link 53 etc. as the cushion raising / lowering mechanism 50 was shown, the structure which uses a damper etc. instead of the cross link 53 etc. is also possible.

20 ··· Front / rear slide mechanism 25 ··· Lifting mechanism (frame lifting mechanism)
41 ··· Seat frame 43 ··· Seat cushion 430 · · · Connection (central connection)
431 ... Cushion right side (cushion side)
431 s ··· Seating surface 432 · · · Cushion center 432 s · · · Seating surface 433 · · · Cushion left side (cushion center)
433 s ··· Seating surface 50 ··· Cushion elevating mechanism 53 ··· Cross link 55 ··· Drive mechanism 57 ··· Hinge member (frame side connecting portion)
58 ... ・ Bearing support material (frame side connecting part)
60 ··· Seat back part F · · · Car floor

Claims (4)

A vehicle seat configured such that a seat cushion provided on a seat frame can be lifted and lowered with respect to the seat frame by a function of a cushion lifting mechanism,
The seat cushion includes a cushion central portion and a cushion side portion located on the vehicle entrance / exit side with respect to the cushion central portion,
The vehicular seat, wherein the cushion raising / lowering mechanism is configured to be able to raise and lower the cushion central portion with respect to the cushion side portion and the seat frame. The vehicle seat according to claim 1,
A frame side connecting portion that connects the seat side edge of the cushion side portion to the seat frame in a vertically rotatable state;
A central side connecting part that connects the cushion side part to the cushion central part in a state in which the edge opposite to the entrance / exit side edge of the cushion side part can be vertically rotated;
A vehicle seat comprising: A vehicle seat according to claim 1 or 2, wherein
A vehicle seat, comprising: a slide mechanism that slides the seat frame along a passenger compartment floor; and a frame elevating mechanism that raises and lowers the seat frame relative to the passenger compartment floor. A vehicle seat according to any one of claims 1 to 3, wherein
The vehicular seat, wherein the cushion elevating mechanism operates to raise the cushion central portion when a lift switch is operated in a state where the door of the entrance / exit is open.

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