JP5493592B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat including a seat cushion configured to tilt a movable seat portion and to raise a buttocks receiving portion that supports an occupant's buttocks.

A vehicle seat related to this is described in Patent Document 1.
The vehicle seat described in Patent Document 1 is configured such that a movable seat portion positioned at the center of a seat cushion is rotatable up and down around the front end side. And the rear part of the movable seat part is the structure pushed up by the drive mechanism and drive arm which were installed under the seat cushion. That is, when the rear portion of the movable seat portion is pushed up by the drive mechanism and the drive arm, the movable seat portion rotates upward about the front end side so that the heel support portion that supports the occupant's heel portion rises. Become.
The drive mechanism includes a feed screw portion arranged in a vertical direction, a nut portion screwed into the feed screw portion, and a motor that rotates the feed screw portion around an axis. The nut portion of the drive mechanism is connected to the rear portion of the movable seat portion via the drive arm.

JP 7-69106 A

In the vehicle seat described above, the drive mechanism that pushes up the rear portion of the movable seat portion of the seat cushion includes a vertical feed screw portion and a nut portion that moves up and down along the feed screw portion. For this reason, the height dimension of a drive mechanism becomes large, and there exists a problem that the hip point of the seat cushion arrange | positioned above the drive mechanism becomes high.
In order to keep the hip point of the seat cushion low, if the length of the lead screw is reduced, the amount of push-up at the rear of the movable seat will be reduced, and the passenger's buttocks will be pushed up to the desired height. The problem of not being able to occur.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is to prevent the seat cushion from having a high hip point and to support the occupant's buttocks when getting on and off. It is to be able to lift the buttocks receiving part of the high.

The above-described problems are solved by the inventions of the claims.
The invention of claim 1 includes a fixed seat portion and a movable seat portion, and by tilting the movable seat portion, the saddle receiving portion that supports the occupant's buttocks at a part of the movable seat portion can be raised. A configured seat cushion, a drive mechanism installed on the lower side of the seat cushion, and configured to reciprocate the movable portion in the horizontal direction on the lower side of the seat cushion; and the movable portion drives the drive by moving in a predetermined direction by the action of mechanism, and configured linkage to be tilting the movable seat of the seat cushion in accordance with the moving amount, and have a said linkage, said The movable seat portion of the seat cushion is configured to be inclined toward the vehicle entrance / exit side, and the movable seat portion, the link mechanism, and the drive mechanism are horizontally slid toward the vehicle entrance / exit side. It characterized that you have provided a slide mechanism for.

According to the present invention, the drive mechanism disposed below the seat cushion is configured to reciprocate the movable portion in the horizontal direction. For this reason, the height dimension of a drive mechanism can be made small compared with the structure which reciprocates a movable part in a height direction. Therefore, the hip point of the seat cushion disposed on the upper side of the drive mechanism can be kept low.
Further, since the movable part reciprocates in the horizontal direction, the stroke of the reciprocating movement of the movable part can be set large with the hip point of the seat cushion kept low. For this reason, it is possible to increase the inclination of the movable seat portion of the seat cushion at the time of getting on and off, and to increase the rising amount of the buttocks receiving portion which is a part of the movable seat portion.
In addition, it is easier to get on and off the vehicle by the action of the slide mechanism.

According to a second aspect of the present invention, there is provided a rotating mechanism for horizontally rotating the seat cushion toward the entrance / exit side of the vehicle.
For this reason, the boarding / alighting of the vehicle is further facilitated by the function of the rotating mechanism .

According to the invention of claim 3 , the link mechanism is formed along the movable seat portion of the seat cushion, the cushion support member integrated with the movable seat portion, and the intermediate position of the cushion support member is the cushion support member. A horizontal support portion that horizontally supports the center of the vertical rotation, and a link that connects the one end of the cushion support member closer to the horizontal support portion and the movable portion of the drive mechanism in a vertically rotatable state. It is characterized by.
For this reason, one end of the seat cushion support member can be moved in a certain direction by the movable portion of the drive mechanism and the link of the link mechanism, thereby rotating the seat cushion support member upward around the horizontal support portion. Thus, the movable seat portion of the seat cushion can be inclined.

According to the invention of claim 4 , the link mechanism is formed along the movable seat portion of the seat cushion, the cushion support member integrated with the movable seat portion, and one end of the cushion support member is connected to the cushion support member. It is characterized by comprising a horizontal support part that supports horizontally as the center of vertical rotation, and a link that connects the intermediate position of the cushion support member and the movable part of the drive mechanism in a vertically rotatable state.
For this reason, the intermediate position of the seat cushion support member can be moved in a certain direction by the movable part of the drive mechanism and the link of the link mechanism, and thereby the seat cushion support member is rotated upward around the horizontal support part. Thus, the movable seat portion of the seat cushion can be inclined.

  According to the present invention, the hip point of the seat cushion does not increase, and furthermore, the buttock receiving portion of the seat cushion can be lifted high when getting on and off.

It is a model perspective view showing the state at the time of boarding / alighting of the vehicle seat which concerns on this Embodiment 1 of this invention. FIG. 2 is a schematic perspective view (A view) showing a state of the vehicle seat during driving of the vehicle, and a schematic perspective view (B view) showing a state of getting on and off the vehicle seat. It is a partially broken side view showing the state at the time of getting on and off of the above-mentioned vehicular seat. It is a partially broken side view showing the state of the vehicle seat during vehicle operation. It is a front view showing the state at the time of vehicle operation of the said vehicle seat. It is a side view showing the state at the time of boarding / alighting of the vehicle seat which concerns on the example 1 of a change. It is a partially broken front view of the vehicle seat which concerns on the example 2 of a change.

[Embodiment 1]
Hereinafter, the vehicle seat according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 7.
Here, front and rear, left and right and up and down in the figure correspond to front and rear, left and right and up and down of a vehicle seat and a passenger car on which the vehicle seat is installed. In addition, front and rear, right and left, and top and bottom in the specification also correspond to the above-described front and rear, right and left, and top and bottom.

<About the outline of the vehicle seat 10>
The vehicle seat 10 according to the present embodiment is a seat (driver's seat) configured to be seated from the right direction through the right entrance / exit E, as shown in FIG. Etc.).
As shown in FIGS. 3 to 5, the vehicle seat 10 includes a seat body 30, a slide rotation mechanism 20 that horizontally rotates the seat body 30 while sliding the seat body 30 back and forth with respect to the passenger compartment floor F, and the seat body. A front / rear slide mechanism 27 that slides the front / rear 30 forward and backward with respect to the rotary table 26 of the slide rotation mechanism 20 is provided.
As shown in FIG. 4 and the like, the seat body 30 is pivotable up and down on a seat frame 31, a seat cushion 40 installed on the seat frame 31, and a rear end portion 31b of the seat frame 31. The seat back 35 is connected, and a cushion tilt mechanism 50 that tilts (stands up) the movable seat portion M of the seat cushion 40 so that the front end edge side is down (see FIG. 3).

<About the slide rotation mechanism 20 and the front / rear slide mechanism 27>
As shown in FIG. 1, the slide rotation mechanism 20 is a mechanism that horizontally rotates rightward while avoiding the center pillar Cp while sliding the seat body 30 forward when the passenger gets off. As shown in FIGS. 3 to 5, the slide rotation mechanism 20 includes a slide mechanism 22 that slides the slide table 23 back and forth on the passenger compartment floor F, and a rotation mechanism 25 that horizontally rotates the rotary table 26 on the slide table 23. And an interlocking mechanism (not shown) that interlocks both the mechanisms 22 and 25. The slide mechanism 22 includes a pair of left and right lower rails 22r extending in the front-rear direction on the passenger compartment floor F, and left and right slide rails that are attached to the lower surface of the slide table 23 and are slidably fitted to the left and right lower rails 22r. 23s and a drive mechanism (not shown) such as a motor for sliding the slide table 23 back and forth.

The rotation mechanism 25 includes an inner ring 25e that is connected so as to be relatively rotatable about an axis, an outer ring 25r, and a drive mechanism (not shown) such as a motor for relatively rotating both the axes 25e and 25r around the axis. It is. The lower surface of the inner ring 25 e is fixed to the upper surface of the slide table 23, and the upper surface of the outer ring 25 r is fixed to the lower surface of the rotary table 26.
A seat body 30 is installed on the rotary table 26 via a front / rear slide mechanism 27. The front / rear slide mechanism 27 is a mechanism for adjusting the front / rear position of the seat body 30, and as shown in FIG. 2, a pair of left and right lower rails 27 r extending in the front / rear direction on the rotary table 26 and the width direction of the seat frame 31. The upper rail 27u is attached to both sides (side walls) and fitted to the left and right lower rails 27r, and a drive mechanism (not shown) such as a motor for sliding the seat frame 31 back and forth.
Here, the side wall portion of the seat frame 31 is covered with a frame cover 31c as shown in FIGS. 3 and 4, the side walls of the frame cover 31c and the seat frame 31 are omitted.

<About seat cushion 40>
As shown in FIG. 2A, the seat cushion 40 includes a cushion front portion 41, a cushion central portion 42, and a cushion rear portion 43 in order from the front side of the central portion. (Omitted) side) is provided with a right side portion 44, and a left side portion 45 is provided on the left side of the central portion (chamber interior side).
The cushion front portion 41 is a portion that mainly supports the thigh of the seated occupant, and is formed in a state of being gently inclined so that the seating surface is lowered on the rear side. The cushion central portion 42 is a portion that mainly supports the occupant's buttocks, and is formed flat with the seating surface at the lowest position. The cushion rear portion 43 is formed in a gently inclined state so as to be lowered in the front.
The right side portion 44 is formed in an inclined state so that the seating surface is higher on the right side (entrance / exit side), and the left side portion 45 is so that the seating surface is higher on the left side (vehicle compartment center side). It is formed in an inclined state. That is, the seating surface of the right side portion 44 and the seating surface of the left side portion 45 are formed in an inclined shape with respect to the seating surfaces of the cushion front portion 41, the cushion central portion 42, and the cushion rear portion 43. Holdability when seated on 40 increases.

The cushion front portion 41 and the cushion central portion 42 of the seat cushion 40 are integrated, and are divided from the other portions of the seat cushion 40, that is, the cushion rear portion 43, the right side portion 44, and the left side portion 45. Yes. The cushion rear portion 43, the right side portion 44, and the left side portion 45 of the seat cushion 40 are fixed to the seat frame 31. The cushion front portion 41 and the cushion central portion 42 of the seat cushion 40 are centered on the front end edge side of the cushion front portion 41 by the function of the cushion tilting mechanism 50 (described later) as shown in FIG. Thus, it is configured to be vertically rotatable.
That is, the cushion front portion 41 and the cushion central portion 42 of the seat cushion 40 are the above-described movable seat portion M, and the cushion central portion 42 corresponds to the buttocks receiving portion of the present invention. Further, the cushion rear portion 43, the right side portion 44, and the left side portion 45 of the seat cushion 40 correspond to the fixed seat portion of the present invention.

<About the cushion tilt mechanism 50>
The cushion tilting mechanism 50 is a mechanism that raises the cushion central portion 42 while gradually tilting (standing up) the movable seat portion M of the seat cushion 40 so that the front end edge side is down, and on the lower side of the seat cushion 40. Has been placed. As shown in FIGS. 3 and 4, the cushion tilt mechanism 50 is integrated with the movable seat portion M, and supports a cushion support member 52 that supports the movable seat portion M from below, and a front portion of the cushion support member 52. It comprises a horizontal support shaft 54 that is supported in a vertically rotatable state, a link 55 that rotates the cushion support member 52 up and down around the horizontal support shaft 54, and a drive unit 60.
The cushion support member 52 has a frame portion 52f formed along the movable seat portion M, a rotation center portion 52c that is hung on the horizontal support shaft 54, and the frame portion 52f from the position of the rotation center portion 52c. A side surface is formed in a substantially inverted L shape by a protruding portion 52t protruding at a right angle.
The horizontal support shaft 54 is installed at the front portion of the seat body 30 so as to extend in the width direction of the seat body 30, and both ends of the horizontal support shaft 54 are left and right side wall portions (not shown) of the seat frame 31. It is fixed to. For this reason, the rotation center portion 52 c of the cushion support member 52 is positioned at a fixed position of the seat body 30 by the horizontal support shaft 54.
That is, the horizontal support shaft 54 corresponds to the horizontal support portion of the present invention, and the horizontal support shaft 54, the cushion support member 52, and the link 55 correspond to the link mechanism of the present invention.

  The drive unit 60 of the cushion tilting mechanism 50 includes a screw shaft 62 disposed to extend in the front-rear direction on the bottom plate 31z of the seat frame 31, and a nut 63 that is screwed with the screw shaft 62. A motor 61 for rotating the screw shaft 62 around its axis is connected to the base end portion (rear end portion) of the screw shaft 62, and the tip end portion and the base end portion of the screw shaft 62 are connected to bearings 64a, 64b is rotatably supported. Further, the base end portion of the link 55 is connected to the nut 63 so as to be rotatable up and down, and the distal end portion of the protruding portion 52t of the cushion support member 52 is also connected to the distal end portion of the link 55 that can be rotated up and down. It is connected to.

  Therefore, for example, when the motor 61 is driven in the state shown in FIG. 4 and the screw shaft 62 rotates in the forward rotation direction, the nut 63 moves along the screw shaft 62 by the screwing action of the screw shaft 62 and the nut 63. To move backward (motor 61 side). As a result, the protrusion 52t of the cushion support member 52 is pulled rearward and downward by the link 55, and the cushion support member 52 and the movable seat portion M of the seat cushion 40 are centered on the horizontal support shaft 54 as shown in FIG. And turn right. That is, the movable seat portion M of the seat cushion 40 is inclined so that the cushion central portion 42 side becomes higher with the front end edge side of the movable seat portion M as a center. Then, the motor 61 is stopped in a state in which the nut 63 has reached the retreat limit position, and the movable seat portion M is held in a state inclined by a predetermined angle (see FIG. 3).

Further, when the screw shaft 62 rotates in the reverse direction from this state, the nut 63 moves forward along the screw shaft 62 by the screwing action of the screw shaft 62 and the nut 63. As a result, the protruding portion 52t of the cushion support member 52 is pushed forward and upward by the link 55, and by its own weight, the movable seat portion M of the seat cushion 40 rotates to the left about the horizontal support shaft 54. Then, the motor 61 is stopped in a state where the nut 63 has advanced to the forward limit position, the movable seat M is returned to the original position, and the seating surface of the movable seat M is in contact with the other seating surfaces of the seat cushion 40. It becomes continuous (see FIG. 2A).
That is, the drive unit 60 corresponds to the drive mechanism of the present invention, and the nut 63 of the drive unit 60 corresponds to the movable unit in the drive mechanism of the present invention.

<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 movable seat portion M of the seat cushion 40 is held at the lower limit position, and the seating surface of the movable seat portion M is continuous with the other seating surfaces of the seat cushion 40 as shown in FIG. ing. Further, by operating the front / rear slide mechanism 27, the front / rear position of the seat body 30 can be adjusted in accordance with the occupant's physique.
Next, when the occupant gets off, the dismount switch (not shown) is operated with the seat belt removed and the right door opened. Accordingly, first, the slide rotation mechanism 20 operates to rotate the seat body 30 to the right while sliding forward, so that the seat body 30 faces the entrance E side. Next, the motor 61 of the cushion tilting mechanism 50 operates to rotate the screw shaft 62 in the forward rotation direction, and the nut 63 moves rearward along the screw shaft 62 from the state shown in FIG. As a result, the protrusion 52t of the cushion support member 52 is pulled rearward and downward by the link 55, and the cushion support member 52 and the movable seat portion M of the seat cushion 40 are centered on the horizontal support shaft 54 as shown in FIG. And turn right. As a result, the movable seat portion M of the seat cushion 40 gradually rises (tilts) with the front edge side down, and the cushion central portion 42 side becomes higher, and the passenger's buttocks are pushed up (see FIG. 1). Thereby, a passenger | crew's knee is extended and the burden to the passenger | crew's body at the time of alighting is reduced.

When the occupant gets on from the state shown in FIG. 1, the boarding switch (not shown) is operated with the weight applied to the movable seat M of the seat cushion 40. As a result, first, the motor 61 of the cushion tilting mechanism 50 operates to rotate the screw shaft 62 in the reverse direction, and the nut 63 moves forward along the screw shaft 62 from the state shown in FIG. As a result, the cushion support member 52 and the movable seat portion M of the seat cushion 40 rotate to the left about the horizontal support shaft 54, and the cushion central portion 42 side gradually decreases. Then, in a state where the movable seat portion M of the seat cushion 40 has reached the lower limit position, as shown in FIGS. 2A and 4, the seating surface of the movable seat portion M is the seating surface of the other portion (fixed portion). And will continue. Next, the slide rotation mechanism 20 operates to rotate the seat body 30 to the left while sliding backward, so that the seat body 30 faces the front of the vehicle.
In this state, the boarding is completed by closing the right door.

<Advantages of the vehicle seat 10 according to the present embodiment>
According to the vehicle seat 10 according to the present embodiment, the drive unit 60 of the cushion tilting mechanism 50 disposed on the lower side of the seat cushion 40 reciprocates the nut 63 (movable unit) along the screw shaft 62 in the horizontal direction. It is configured to be allowed to. For this reason, compared with the structure which reciprocates the nut 63 (movable part) to a height direction, the height dimension of the drive part 60 can be made small. Therefore, the hip point of the seat cushion 40 disposed on the upper side of the drive unit 60 can be kept low.
Furthermore, since the nut 63 (movable part) reciprocates in the horizontal direction, the stroke of the reciprocating movement of the nut 63 (movable part) can be set large with the hip point of the seat cushion 40 kept low. . For this reason, it is possible to increase the inclination of the movable seat portion M of the seat cushion 40 when getting on and off, and to increase the rising amount of the buttock receiving portion.
In addition, since the slide rotation mechanism 20 that horizontally rotates the seat cushion 40 toward the entrance / exit E of the vehicle is provided, it is easier to get on and off the vehicle.

<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 vehicle seat 10 according to the present embodiment, the rotation center portion 52c at the midway position of the cushion support member 52 of the cushion tilt mechanism 50 is supported by the horizontal support shaft 54, and the protrusion 52t of the cushion support member 52 is supported. The example which connected the front-end | tip with the nut 63 of the drive part 60 with the link 55 was shown. However, as shown in FIG. 6, the rotation center portion 52 c provided on the front end side of the cushion support member 52 is supported by the horizontal support shaft 54, and the midway position of the cushion support member 52 is linked by the link 55 to the nut 63 of the drive unit 60. It is also possible to connect with

Further, in this embodiment, after the seat main body 30 is horizontally rotated to the entrance / exit E side by the slide rotation mechanism 20, the movable seat portion M of the seat cushion 40 is gradually inclined so that the front edge side is downward. Indicated. However, as shown in FIG. 7, after the movable seat portion M of the seat cushion 40 is slid to the right of the entrance E, the movable seat portion M is inclined so that the right edge side is down. .
That is, in the seat cushion 40 shown in FIG. 7, the movable seat portion M is composed of a cushion central portion 42 and a central portion of the right side portion 44, and a cushion support member 52 is provided on the lower surface side of the movable seat portion M. It has been. And the rotation center part 52c is provided in the right end vicinity position of the cushion support member 52, and the rotation center part 52c is supported by the horizontal support shaft 54 extended in the front-back direction.
The horizontal support shaft 54 is horizontally supported by a wall portion (not shown) of a right slide table 31y configured to be slidable to the right with respect to the seat cushion 40.

On the right slide table 31y, a screw shaft 62 of the drive unit 60 of the cushion tilting mechanism 50 is disposed so as to extend in the left-right direction, and a nut 63 is screwed to the screw shaft 62. A motor 61 that rotates the screw shaft 62 about its axis is connected to the base end portion of the screw shaft 62, and the distal end portion of the screw shaft 62 is rotatably supported by a bearing 64. The base end portion of the link 55 is connected to the nut 63 so as to be rotatable up and down, and the distal end portion of the link 55 is connected to the right end position of the cushion support member 52 so as to be rotatable up and down. .
For this reason, when the screw shaft 62 rotates by driving the motor 61, the nut 63 moves leftward or rightward along the screw shaft 62 due to the screwing action of the screw shaft 62 and the nut 63. As a result, the movable seat M of the seat cushion 40 rotates leftward or rightward in FIG. 7 about the horizontal support shaft 54.
The right slide table 31y is configured to slide in the left-right direction on the front-rear slide table 23 by the action of the slide mechanism 27 including the lower rail 27r and the upper rail 27u.
For this reason, after the movable seat part M of the seat cushion 40 is slid rightward in the direction of the entrance / exit E at the time of getting on and off, the movable seat part M is inclined so that the right end edge side is down and the occupant's buttocks are pushed up. Is possible.

Here, in the present embodiment, an example in which the drive unit 60 of the cushion tilting mechanism 50 is configured by the screw shaft 62 and the nut 63 is shown. However, instead of the screw shaft 62 and the nut 63, for example, a rack and pinion, etc. It is also possible to use an air cylinder or the like.
In the present embodiment, the example in which the slide rotation mechanism 20 and the front / rear slide mechanism 27 are operated by a drive mechanism such as a motor is shown, but a configuration in which the slide rotation mechanism 20 and the front / rear slide mechanism 27 are manually operated is also possible.
Moreover, in this embodiment, although the example which applies this invention to the vehicle seat 10 (driver's seat etc.) seated from the right direction through the right side entrance / exit E is shown, it passes left side through the left side entrance / exit. It is also possible to apply the present invention to a vehicle seat (passenger seat or the like) seated from the front.
In the present embodiment, an example in which the present invention is applied to a seat facing the front of the vehicle has been described. However, the present invention can also be applied to a seat facing the vehicle lateral direction.

20 ... slide rotation mechanism (rotation mechanism)
25 ... Rotating mechanism 40 ... Seat cushion 41 ... Cushion front (movable seat)
42 ... Cushion center (movable seat, buttocks receiving part)
43 ... Cushion rear (fixed seat)
44 ... Right side (fixed seat)
45 ... Left side (fixed seat)
50 ... Cushion tilt mechanism 52 ... Cushion support member (link mechanism)
54 ... Horizontal support shaft (horizontal support link mechanism)
55 ... Link (link mechanism)
60 ... Drive unit (drive mechanism)
62 ... Screw shaft 63 ... Nut (movable part)
E ... Entrance / exit gate F ... Vehicle floor M ...

Claims (4)

A seat cushion composed of a fixed seat portion and a movable seat portion, and configured to raise the buttocks receiving portion that supports the occupant's buttocks at a part of the movable seat portion by inclining the movable seat portion;
A drive mechanism installed on the lower side of the seat cushion and configured to reciprocate the movable portion horizontally in the lower side of the seat cushion;
By the movable portion moves in a predetermined direction by the action of the drive mechanism, which have a, a link mechanism configured to be tilting the movable seat of the seat cushion in accordance with the amount of movement,
The link mechanism is configured such that the movable seat portion of the seat cushion can be inclined toward the entrance / exit side of the vehicle,
Further, the movable seat, the link mechanism and the vehicle seat, characterized that you have provided a slide mechanism for horizontally sliding the drive mechanism on the entrance side of the vehicle. The vehicle seat according to claim 1,
A vehicle seat, comprising: a rotation mechanism that horizontally rotates the seat cushion toward the entrance / exit side of the vehicle. The vehicle seat according to claim 1 or 2 , wherein
The link mechanism is formed along the movable seat portion of the seat cushion, the cushion support member integrated with the movable seat portion, and the midway position of the cushion support member as the center of the vertical rotation of the cushion support member A horizontal support part that supports the horizontal support, and a link that connects one end of the cushion support member closer to the horizontal support part and the movable part of the drive mechanism in a state in which the movable part can be rotated up and down. Vehicle seat to be used. The vehicle seat according to claim 1 or 2 , wherein
The link mechanism is formed along the movable seat portion of the seat cushion, and a cushion support member integrated with the movable seat portion, and one end of the cushion support member as a center of vertical rotation of the cushion support member. A vehicle seat, comprising: a horizontal support portion that is supported by the vehicle; and a link that connects the midway position of the cushion support member and the movable portion of the drive mechanism in a vertically rotatable state.

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