JPH07108861A - Vehicle seat unit - Google Patents

Abstract

PURPOSE:To allow occupants to easily get into and off a vehicle by separating part of a seat including a seat back and a seat cushion from a vehicle rear seat, etc., and enabling the separated seat to slide, rise and fall, and rotate. CONSTITUTION:When occupants get into or off a vehicle, first the reversible motor 15 of a sliding mechanism 11 is turned in the normal direction to advance a lower sliding plate 6 via a screw shaft 14; at the same time, the bracket 20 of a first elevating mechanism 19 is advanced and a bracket 23 is lowered via the engagement of a pin 21 in a cam groove 22; thereby the seat back of a separated seat is advanced while a seat cushion is lowered. Next, the reversible motor 35 of a second elevating mechanism 25 is turned in the normal direction to extend a link mechanism 26 via a screw shaft 34 to raise an upper sliding plate 7; then a rotating plate supported on an axis of rotation on the upper sliding plate 7 is rotated by a predetermined angle toward a vehicle door.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat device, and more particularly, to a vehicle seat device rotatable toward a door.

[0002]

2. Description of the Related Art Generally, when an occupant gets in or out of a vehicle, he or she bends his hips or spreads his legs widely because of the influence of the seat height of the vehicle, that is, the seat for the vehicle, and the distance from the door position. The current situation is that people are forced to get on and off in an unreasonable posture, and especially for the elderly, it was extremely difficult to get on and off.

For the above reasons, it has been desired to enable the passenger to get on and off in a comfortable posture.

As an improvement of the occupant's entry / exit posture, in a seat having a support portion on the door side of the seat surface, the opening / closing movement of the door and the change of the direction of the support portion are linked to each other, so that It has been proposed to make it easier to get on and off the vehicle (for example, the actual exploitation 62
-100055).

[0005]

In the case of the above-mentioned known example, the occupant does not change the orientation of the seat itself, only the orientation of the support portion is changed in conjunction with the opening and closing of the door. However, there is a problem that the operation such as straddling the side sill in the door opening is forced, and there is still room for improvement.

The present invention has been made in view of the above points, and it is an object of the present invention to rotate a seat itself toward a door so that passengers can get on and off very easily without straddling a side sill of a door opening. It is what

[0007]

According to a first aspect of the present invention, as a means for solving the above problems, a vehicle seat including a seat in which a seat back and a seat cushion are integrally connected at a seating portion of an occupant. In the device, a slide mechanism for moving the seat back of the seat forward from the seat surface of the seat back of the adjacent seat, and the bottom surface of the seat cushion of the seat are located above the seat surface of the seat cushion of the adjacent seat. An elevating mechanism for relatively moving the seat and a rotation driving mechanism for rotating the seat toward the door side by a predetermined rotation angle about a rotation shaft provided on the vehicle body side as a rotation center are additionally provided.

According to a second aspect of the present invention, as a means for solving the above-mentioned problems, the elevating mechanism is a first elevating mechanism that moves a seat cushion of an adjacent seat downward with the forward movement of the seat. The second lifting mechanism is configured to move the seat cushion of the seat above the seat surface of the adjacent seat cushion that is moved downward by the first lifting mechanism.

[0009]

According to the first aspect of the invention, the following actions can be obtained by the above means.

That is, when the passenger gets on or off the vehicle,
The slide mechanism moves the seat back of the seat forward from the seating surface of the seat back of the adjacent seat,
Next, the bottom surface of the seat cushion of the seat is relatively moved by the elevating mechanism so that it is located above the seat surface of the seat cushion of the adjacent seat, and then the seat is mounted on the vehicle body by the rotary drive mechanism. It can be rotated to the door side with the center of rotation as. With respect to the seat in this state, the occupant can get on and off in a comfortable posture with his / her legs extended outside the vehicle and his / her waist sitting on the seat cushion.

According to the second aspect of the invention, the following effects can be obtained by the above means.

That is, when the occupant gets on and off the vehicle, as the seat back of the seat is moved forward from the seat surface of the seat back of the adjacent seat by the slide mechanism, the seat cushion of the adjacent seat is moved to the first position. After being moved downward by the elevating mechanism, the seat cushion of the seat is moved upward by the second elevating mechanism, so that the amount of upward movement of the seat cushion of the seat can be minimized.

[0013]

According to the invention of claim 1, when the occupant gets on and off the vehicle, the seat back of the seat is moved forward by the slide mechanism from the seating surface of the seat back of the adjacent seat. After the bottom surface of the seat cushion of the seat is relatively moved by the elevating mechanism so as to be positioned above the seat surface of the seat cushion of the adjacent seat, the seat is rotated by the rotation drive mechanism about the rotation shaft provided on the vehicle body side. Since it is designed to be rotated to the door side as a center, the occupant can get on and off the seat in this state in a comfortable posture with the legs extended outside the vehicle and the hips sitting on the seat cushion. It has an excellent effect that it can be performed smoothly and easily.

According to the second aspect of the invention, when the occupant gets on and off the vehicle, the seat backs of the seats are adjacent to each other as they are moved forward from the seating surfaces of the seat backs of the adjacent seats. Since the seat cushion of the seat is moved downward by the second elevating mechanism after the seat cushion of the seat is moved downward by the first elevating mechanism, the upward movement amount of the seat cushion of the seat is minimized. Therefore, there is an excellent effect that it is possible to easily cope with a vehicle having a high seat cushion seat surface or a vehicle having a low ceiling surface.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In this embodiment, as shown in FIGS. 7 and 8, the present invention is applied to the left seat SL of the rear seat S, and the rotary seat 1 is the main seat back SLB of the left seat SL. The seat back 2 and the seat cushion 3 are integrally connected. Reference numeral SR is a right seat, SRB is a right seat back, SRC is a right seat cushion, SC is a center seat portion adjacent to the left seat SL, SCB is a center seat seat back, and SCC is a center seat. It is a seat cushion of the part.

As shown in FIGS. 1 to 6, the vehicle seat device of this embodiment has a substrate 4 supported on a vehicle body floor F.
A lower slide plate 6 which is guided by a pair of guide rails 5, 5 arranged in the vehicle front-rear direction on the base plate 4 and movable in the vehicle front-rear direction, and above the lower slide plate 6. Upper slide plate 7 that moves in the vehicle front-rear direction together with the lower slide plate 6
And a rotary plate 9 rotatably supported by a rotary shaft 8 with respect to the upper slide plate 7.
Reference numeral 10 is a slide guide fixed to the lower surface of the lower slide plate 6. In the case of this embodiment, the substrate 4,
Lower slide plate 6 and upper slide plate 7
Is disposed on the vehicle body side, and the rotating plate 9 is disposed in the seat cushion 3 of the rotating seat 1.

Between the base plate 4 and the lower slide plate 6, the seat back 2 of the rotary seat 1 is moved forward of the seating surface of the adjacent seat back portion (in this embodiment, the main seat back SLB). A slide mechanism 11 is interposed.

The slide mechanism 11 is supported by a bracket 12 provided upright at the center of the base plate 4, and has a nut member 13 having a screw hole extending in the front-rear direction of the vehicle body. The lower slide plate 6 is composed of a screw shaft 14 which is installed in the front-rear direction of the vehicle body, and a reversible motor 15 which rotates the screw shaft 14 forward and backward. The driving force of the reversible motor 15 is the reduction mechanism 16
It is to be transmitted to the screw shaft 14 via. Reference numeral 17 is a bearing that rotatably supports one end of the screw shaft 14, and reference numeral 18 is a movement-permitting opening formed in the lower slide plate 6. In the case of this embodiment, the reversible motor 15
The lower slide plate 6 is guided by the guide rails 5, 5 on the board 4 and moved in the front-rear direction of the vehicle body by the forward / reverse rotation of the screw shaft 14 in accordance with the forward / reverse rotation driving. The drive of the reversible motor 15 is stopped by the signal from a proximity switch (not shown) when the lower slide plate 6 is moved forward and backward.

Further, in this embodiment, on the right side of the lower slide plate 6, an extension portion extending downwardly of the seat cushion SCC (see FIGS. 7 and 8) of the center seat portion SC which is an adjacent seat. 6a is integrally formed, and a first elevating mechanism 19 for elevating the seat cushion SCC is provided between the extending portion 6a and the seat cushion SCC.

The first elevating mechanism 19 includes a U-shaped bracket 20 erected on the extending portion 6a, a pin 21 installed on the upper end of the bracket 20, and both ends of the pin 21. It is constituted by an inverted U-shaped bracket 23 having cam grooves 22, 22 to be engaged with and operating integrally with the seat cushion SCC. Each cam groove 22
Is a horizontal upper locking groove 22a located on the front side of the vehicle body.
And a lower horizontal locking groove 22b located on the rear side of the vehicle body
And an inclined groove portion 22c formed obliquely upward from the lower locking groove portion 22b toward the upper locking groove portion 22a, the bracket 23 (when the pin 21 is engaged with the lower locking groove portion 22b). In other words, the seat cushion SCC is positioned at the raised position, and the bracket 23 (in other words, the seat cushion SCC) is positioned at the lowered position in a state where the pin 21 is engaged with the upper locking groove portion 22a. Has become. Reference numeral 24
Is an elevating guide that connects the substrate 4 and the seat cushion SCC and serves as a guide during the elevating operation of the seat cushion SCC.

In the case of this embodiment, the first elevating mechanism 19 is used.
Is interlocked with the movement of the lower slide plate 6 in the front-rear direction, and when the slide plate 6 moves forward, the pin 21 is engaged with the upper engagement groove portion 2 of the cam groove 22.
2a is engaged to lower the seat cushion SCC, and when the slide plate 6 moves rearward, the pin 21 engages with the lower engaging groove portion 22b in the cam groove 22 to raise the seat cushion SCC.

A second elevating mechanism 25 for elevating the seat cushion 3 of the rotating seat 1 is provided between the lower slide plate 6 and the upper slide plate 7.

The second elevating mechanism 25 is of a jack type and has a pair of link mechanisms 26, 26 between the lower slide plate 6 and the upper slide plate 7 and facing each other in the vehicle width direction, and the link mechanism 26. And 26 for driving the expansion and contraction operation.

The link mechanisms 26 are mounted on the lower slide plate 6 and the upper slide plate 7 with respect to the end portions of the support brackets 28, 28 and 29, 29 fixed in the vehicle longitudinal direction at predetermined intervals in the vehicle width direction. Lower swing arm 3 whose one end is swingably supported
0 and 30 and the upper swing arms 31 and 31, the other ends of the lower swing arms 30 and 30 and the other ends of the upper swing arms 31 and 31, respectively, and the lower swing arms 30 and 3 are connected.
0 and the upper swing arms 31, 31 and a connecting rod 32 that connects the other ends of the upper and lower swing arms 31, 31.

On the other hand, the driving means 27 is screwed to the nut member 33 provided at the intermediate portion of the connecting rod 32 in the one (left side in the present embodiment) link mechanism 26 and the nut member 33. And the other (in the case of the present embodiment,
The screw shaft 34 penetrates the (right side) link mechanism 26, and a reversible motor 35 that drives the screw shaft 34 to rotate forward and backward. The driving force of the reversible motor 35 is transmitted to the screw shaft 34 via a reduction mechanism 36. Reference numerals 37 and 38 denote connecting rods that connect one ends of the lower swing arms 30 and 30 and one ends of the upper swing arms 31 and 31, and 39 connects the lower slide plate 6 and the upper slide plate 7 and the upper slide. It is an elevating guide that serves as a guide during the elevating operation of the plate 7. In the case of this embodiment, the link mechanism 26,
26 is extended or contracted to move the upper slide plate 7 up and down.
Here, the upper limit of the upper slide plate 7 is set to the first
Seat cushion SCC lowered by the lifting mechanism 19
The bottom surface of the seat cushion 3 of the rotating seat 1 is located above the seat surface. The drive of the reversible motor 15 is stopped by the signal from a proximity switch (not shown) when the upper slide plate 7 is moved up and down.

A rotary shaft 8 is provided on the door side of the upper slide plate 7 (in other words, on the left side),
A rotating plate 9 is pivotally attached to the upper end of the rotating shaft 8.
Further, between the upper slide plate 7 and the rotary plate 9, the rotary plate 9 (in other words, the rotary sheet 1) is rotated at a predetermined rotation angle about the rotary shaft 8 on the door side (in other words, in the direction of arrow M). The rotary drive mechanism 41 for rotating to () is provided.

The rotary drive mechanism 41 has an arcuate gear 42 fixed to the lower surface of the rotary plate 9, a drive gear 43 meshing with the arcuate gear 42, and a reversible drive for rotating the drive gear 43 forward and backward. And a motor 44. The arc-shaped gear 42 has a shape along an arc centered on the rotation shaft 8 and has an arc length capable of rotating the rotation plate 9 by a rotation angle of about 45 ° from a position where the rotation plate 9 overlaps with the upper slide plate 7 (the present embodiment). (In the case of the example, arc length of 65 °)
Is said to have.

The drive gear 43, as shown in FIG.
The support member 45 to which the upper slide plate 7 is fixed
Is rotatably supported by a support shaft 46 which is pivotally supported upward. The reversible motor 44 is also attached to the support member 45, and its driving force is transmitted to the drive gear 43 via a reduction mechanism 47. The reduction mechanism 47 comprises a small-diameter gear 48 pivotally attached to the rotary shaft 44a of the reversible motor 44, and a large-diameter gear 49 meshing with the small-diameter gear 48 and capable of rotating together with the drive gear 43. There is. Reference numeral 50 is a gear retainer for ensuring engagement between the drive gear 43 and the arcuate gear 42.

Then, the drive gear 43 and the arc-shaped gear 42, which are normally and reversely rotated by the normal and reverse rotation drive of the reversible motor 44.
The rotation plate 9 (in other words, the rotation sheet 1) is rotated in the direction of the arrow M or the direction of the arrow N by a rotation angle of 45 ° by the engagement with. The driving of the reversible motor 44 is stopped by a signal from a proximity switch (not shown) in the rotation operation limit of the rotary plate 9.

In this embodiment, the upper surface of the arc-shaped guide surface 51 formed on the upper surface of the upper slide plate 7 supports the rotating plate 9 in a stable state and smoothes the rotating operation. A plurality of guide rods 52 projecting from the lower surface of the rotating plate 9,
.. are abutted and supported. A roller 53 for reducing sliding resistance is provided at the lower end of each guide rod 52.
(See FIG. 6) are provided.

Further, in this embodiment, an arc-shaped guide groove 54 is provided at the rear side portion of the upper slide plate 7.
Are formed. A pull rod 55 vertically extending from the rotating plate 9 is engaged with the guide groove 54, and a retaining ring 56 is fixed to the lower end of the pull rod 55. Accordingly, when the weight of the occupant seated on the rotating seat 1 leans toward the front side while the rotating plate 9 (in other words, the rotating seat 1) is rotated in the direction of the arrow M, the pulling rod 55 It is possible to prevent the forward tilting of the rotary plate 9 by the pulling action.

In the case of this embodiment, the reversible motor 15,
A switch for starting driving 35 and 44 is additionally provided in a vehicle compartment such as a driver's seat or a rear seat.

The vehicle seat constructed as described above operates as follows.

When the occupant gets on and off, the reversible motor 15 constituting the slide mechanism 11 is driven to rotate forward, and the lower slide plate 6 is moved forward by the forward rotation of the screw shaft 14 accompanying the forward rotation of the reversible motor 15. Predetermined movement amount
(That is, the seat back 2 of the rotating seat 1 is moved by an amount of movement located in front of the seat surface of the main seat back SLB which is the adjacent seat). With the forward movement of the lower slide plate 6, the bracket 20 on the side of the lower slide plate extension 6a forming the first elevating mechanism 19 is moved forward, and the pin 21 and the cam grooves 22, 22 are engaged with each other to cause the center seat. The bracket 23 on the part SCC side is forcibly lowered by a predetermined amount. As a result, the seat back 2 of the rotary seat 1 moves forward of the seat surface of the main seat back SLB to enable the rotary operation of the rotary seat 1 described later, and at the same time, the seat cushion S of the center seat portion SC.
CC is lowered.

After that, when the reversible motor 35 constituting the second elevating mechanism 25 is driven to rotate forward, the reversible motor 35 is rotated.
The positive rotation of the screw shaft 34 associated with the positive rotation of the link mechanism 2
6 and 26 are extended and the upper slide plate 7 (that is, the seat cushion 3 of the rotating seat 1) is moved by a predetermined amount.
(That is, the amount by which the seat cushion 2 of the rotary seat 1 is located above the seat surface of the center seat seat cushion SCC which is the adjacent seat). As a result, the seat cushion 3 of the rotating seat 1 moves above the seat surface of the center seat cushion SCC, and the rotating operation of the rotating seat 1 described later becomes possible.

Next, when the reversible motor 44 constituting the rotary drive mechanism 41 is driven to rotate in the normal direction, the arc gear 42 centering on the rotary shaft 8 is rotated by the normal rotation of the drive gear 43 accompanying the normal rotation of the reversible motor 44. Is moved by a rotation angle of 45 ° in the direction of arrow M (see FIG. 2 and FIG. 5) which is the side, and the rotation plate 9 is rotated about the rotation axis 8 by a rotation angle of 45 ° toward the door side along with the movement. Be punished
(Figure 5 chain line illustration). As a result, the rotating sheet 1 is shown in FIG.
It will be rotated to the door side as shown in.

Rotating sheet 1 rotated as described above
When the occupant tries to get on and off, the occupant can get on and off in a comfortable posture with his / her legs extended outside the vehicle and his / her waist on the seat cushion 3.

Moreover, in the case of this embodiment, when the occupant gets on and off the vehicle, the rotating seat 1 is moved by the slide mechanism 11.
Is a main seat back S of the left seat SL.
The seat cushion S of the center seat portion SC which is the adjacent seat as the seat cushion S is moved forward from the seat surface of the LB.
After CC is moved downward by the first elevating mechanism 19, the seat cushion 3 of the rotating seat 1 is moved upward by the second elevating mechanism 25. Therefore, the seat cushion 2 of the rotating seat 1 is moved upward. The amount can be minimized. Therefore, it is possible to easily cope with a vehicle in which the seat surface of the seat cushion 2 of the rotating seat 1 is high or a vehicle in which the ceiling surface is low.

When the rotary seat 1 is returned to its original state, the reversible motors 15, 35, 44 are reversed in the reverse order.
May be driven in reverse rotation.

In the above-described embodiment, the two lifting mechanisms 19 and 25 are used as the lifting mechanism for relatively moving the seat cushion 3 of the rotary seat 1 above the seat surface of the seat cushion SCC of the center seat portion SC which is the adjacent seat. However, in the case of a vehicle in which the ascending limit of the rotating seat 1 is allowed to be large or the center seat seat cushion SCC can be greatly lowered, only the second elevating mechanism 25 or the first elevating mechanism 19 is used. It is also possible to

Further, in the above embodiment, the main seat back SLB and the seat cushion 3 in the left seat SL.
Although the rotating sheet 1 is made to rotate, the left sheet SL itself may be rotated.

The invention of the present application is not limited to the configuration of the above-mentioned embodiment, and it goes without saying that the design can be appropriately changed without departing from the scope of the invention.

[Brief description of drawings]

FIG. 1 is a perspective view showing a slide mechanism and a lifting mechanism in a vehicle seat device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a rotation drive mechanism in the vehicle seat device according to the embodiment of the invention.

FIG. 3 is a plan view showing a slide mechanism and a lifting mechanism in the vehicle seat device according to the embodiment of the invention.

4 is a sectional view taken along the line IV-IV in FIG.

FIG. 5 is a plan view showing a rotation drive mechanism in the vehicle seat device according to the embodiment of the invention.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a perspective view showing an overall configuration of a vehicle seat device according to an embodiment of the present invention.

FIG. 8 is a perspective view showing an overall configuration of a vehicle seat device according to an embodiment of the present invention when the vehicle seat device is rotated.

[Explanation of symbols]

1 is a seat (rotary seat), 2 is a seat back, 3 is a seat cushion, 6 is a lower slide plate, 7 is an upper slide plate, 8 is a rotary shaft, 9 is a rotary plate, 11
Is a slide mechanism, 19 is a first elevating mechanism, 25 is a second elevating mechanism, 41 is a rotary drive mechanism, S is a rear seat, SL is a left seat, SLB is a main seat back of a left seat, SC
Is the center seat, SCB is the seat back of the center seat, and SCC is the seat cushion of the center seat.

Claims (2)

[Claims] 1. A vehicle seat device including a seat in which a seat back and a seat cushion are integrally connected in a seating portion of an occupant, the seat back of the seat being closer to a seat surface of an adjacent seat back. A slide mechanism for moving the seat forward, a lifting mechanism for relatively moving the seat cushion so that the bottom surface of the seat cushion is located above the seat surface of the seat cushion of the adjacent seat, and a rotation shaft provided on the vehicle body side for the seat. A vehicle seat device, further comprising: a rotation drive mechanism for rotating the door about a predetermined rotation angle toward a door side. 2. The elevating mechanism includes a first elevating mechanism that moves a seat cushion of an adjacent seat downward as the seat moves forward, and an adjacent seat cushion that is moved downward by the first elevating mechanism. The vehicle seat apparatus according to claim 1, wherein the vehicle seat apparatus comprises a second elevating mechanism that moves a seat cushion of the seat upward from a seat surface.