JP2000272392A - Seat flattening structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat flattening structure for a vehicle effecting a full reclined condition for a seat back without adopting an exclusive reclining mechanism. SOLUTION: A lock plate (locking means) 20 is provided with a first engagement part 20a and second engagement part 20b. When a roller 16 at the lower end of a seat back 11 is engaged with the first engaging part 20a, the seat back 11 can retain a normal upright condition. When the roller 16 is engaged with the second engaging part 20b, the seat back 11 can be reclined. Thus, as a reclined condition for the seat back 11 is attainable by utilizing the existing lock plate 20, supporting structure for the seat back 11 becomes uncomplicated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat seat structure for an automobile.

[0002]

2. Description of the Related Art Generally, a flat structure in which a seat cushion and a seat back can be horizontally arranged at substantially the same height is known for a seat for an automobile in order to take a rest or sleep, or to widely use a luggage room. (Refer to Japanese Utility Model Publication No. 7-27239 as a similar technique).

[0003] This kind of flat structure is provided with a seat cushion and a seat back which are rotated to be horizontally inverted, and the back surface of the seat cushion and the back surface of the seat back are substantially the same height when the seat cushion is inverted. In particular, in the case of a seat back, a roller provided at the lower end of the seat back is engaged with a slide rail so that the front and rear positions are not significantly changed, and the intermediate fulcrum of the seat back is slid by a back link. It is connected to the rail or its peripheral members. The roller at the lower end of the seat back is engaged with the lock mechanism so that the normal use state of the seat back is maintained. Then, when the lock mechanism is released and the roller is slid rearward, the seat back is rotated to the front side to obtain a horizontal reversal state.

[0004]

However, in such a conventional technique, a structure such as a roller, a back link, and a lock mechanism provided on a seat back is used to make use of the structure.
Although the seatbacks can be flipped in place, their structure is used only for flipping and cannot be used for any other purpose. Therefore, for example, in order to obtain a reclining state by tilting the seat back having such a flat structure rearward, a dedicated reclining mechanism is required, and the supporting structure of the seat back becomes complicated.

The present invention has been made by paying attention to such a conventional technique, and provides a flattened seat structure of an automobile in which a seat back can be placed in a reclining state without providing a dedicated reclining mechanism. Is what you do.

[0006]

According to the first aspect of the present invention,
A seat cushion and a seat back are provided, each of which turns horizontally and is in a reversed state, and the back of the seat cushion and the back of the seat back are substantially at the same height when the seat is reversed, and the lower end of the seat back has a vehicle width direction. A roller that protrudes outward is provided, the roller is slidably engaged with a slide rail fixed to the floor, and a locking mechanism that engages with the roller is provided. The intermediate fulcrum and the middle part of the slide rail or its peripheral members are connected by a back link, the lock mechanism is released, and the roller of the seat back is slid rearward, whereby the seat back rotates forward. A flattened seat structure for an automobile that is in a horizontally inverted state, wherein the lock mechanism is provided for a seatback in a normal use state. A first engaging portion that over La engage,
It has a second engaging portion that engages with the roller of the seat back in the reclining state.

According to the first aspect of the present invention, since the lock mechanism is provided with the first engagement portion and the second engagement portion, if the roller at the lower end of the seat back is engaged with the first engagement portion, The normal use state of the seat back can be maintained, and if the roller is engaged with the second engagement portion, the seat back can be in the reclining state. As described above, the reclining state of the seat back can be obtained by using the existing lock mechanism, so that the support structure of the seat back does not become complicated.

According to a second aspect of the present invention, the lock mechanism is formed by a lock plate which is urged downward about the front end shaft, and a first engagement portion and a second engagement portion are provided on the lower edge of the lock plate. The joining portions are respectively recessed, and the rollers can be moved from the second engaging portion to the first engaging portion while the rollers are along the lower edge of the lock plate.

According to the second aspect of the present invention, the roller can be moved from the second engaging portion to the first engaging portion while the roller is along the lower edge of the lock plate. Just raise it and the seat back will automatically be in normal use.

According to the third aspect of the present invention, the seat cushion is rotated from the normal use state to the front side around the front end fulcrum to be in a horizontally inverted state.

According to the third aspect of the present invention, since the seat cushion is simply turned forward about the front end fulcrum as the reversing structure of the seat cushion, the structure is simple and the reversing operation is easy.

According to the fourth aspect of the invention, a bracket as a peripheral member is erected near the slide rail, and the end of the back link is pivotally supported on the bracket.

According to the fourth aspect of the present invention, since the end of the back link is supported by the bracket erected near the slide rail, the end of the back link is supported by the slide rail. It is not necessary to perform the above processing, and the slide rail can be easily manufactured, and the rigidity of the slide rail can be prevented from lowering.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. In this embodiment, a second-row second seat 1 as a "front seat" in a wagon car is provided.
3 shows a flattened structure according to a third row of third seats 2 as "rear seats" provided at the rear of the vehicle. The second seat 1 has a seat cushion 3 and a seat back 4.
The seat back 4 can be reclined rearward around the hinge point 5.

The third seat 2 is supported by a slide rail 6. The slide rail 6 is fixed to a floor 8 by front and rear legs 7. A pair of slide rails 6 are provided on the left and right sides, each having a cross-sectional C shape having an opening on the inner surface along the longitudinal direction. A luggage room R is formed behind the slide rail 6.

In the vicinity of the front end of the slide rail 6,
A bracket 9 as a “peripheral member” is erected on the floor 8. The bracket 9 has a rectangular shape in a side view, and is joined to the inside of the slide rail 6 (FIG. 8).
reference). The joining rigidity of the slide rail 6 is improved by joining the bracket 9.

The third seat 2 includes a seat cushion 10
And the seat back 11. The front end of the seat cushion 10 is pivotally supported by a front end fulcrum 12 set at the upper front end of the bracket 9. The rear end of the seat cushion 10 is placed on a support (not shown) so that the normal use state with the surface facing upward can be reliably maintained. In addition, the seat cushion 10
By lifting the rear end of the seat cushion 10 and rotating the entire seat cushion 10 to the front side around the front end fulcrum 12, an inverted state with the back surface 10a facing upward can be obtained. As the reversing structure of the seat cushion 10, since it is simply rotated to the front side about the front end fulcrum 12, the structure is simple and the reversing operation is easy.

There are two types of inverted states of the seat cushion 10, a "first inverted state" in which the back surface 10a of the seat cushion 10 is horizontal, and a "second inverted state" in which the back surface 10a is lowered forward by a predetermined angle θ. There is. The selection between the first inverted state and the second inverted state is performed by the operation lever 13 and the latch plate 14 as a “lock mechanism”. The operation lever 13 is rotatably attached to the side surface of the seat cushion 10, and is provided with a spring 15 for urging the front end 13a toward the back surface 10a. The latch plate 14 is welded to the inner surface of the bracket 9, and a first engaging portion 14 a and a second engaging portion 14 b which are inclined like a saw blade are cut out at the lower edge. The latch plate 14 extends upward to the region of the front end fulcrum 12, and also functions as a reinforcing plate for increasing the rigidity of the front end fulcrum 12.

Therefore, when the front end 13a of the operation lever 13 is engaged with the first engagement portion 14a of the latch plate 14 by rotating the seat cushion 10 to the front side, the back surface 10a of the seat cushion 10 is horizontal. In the first inverted state (FIG. 3), when the distal end 13a of the operation lever 13 is engaged with the second engagement portion 14b, the second inverted state (FIG. 4) in which the back surface 10a is lowered forward by a predetermined angle θ. . Since the first engagement portion 14a and the second engagement portion 14b are each in an oblique state, if the seat cushion 10 is slightly lifted with the distal end 13a of the operation lever 13 engaged with the second engagement portion 14b. , The distal end 13a is disengaged from the second engaging portion 14b and automatically engaged with the first engaging portion 14a. If the seat cushion 10 is further lifted, the distal end 13a is also disengaged from the first engaging portion 14a.
It can be returned to the original state of normal use.

On the other hand, a roller 16 is provided at the lower end of the seat back 11 so as to protrude outward in the vehicle width direction. The roller 16 is engaged with the slide rail 6 so as to be slidable back and forth. An intermediate fulcrum 17 is set at an intermediate portion of the seat back 11, and the intermediate fulcrum 17 and the bracket 9 are connected by a back link 18. Since the end of the back link 18 is pivotally supported by a bracket 9 that is different from the slide rail 6, there is no need to perform processing for pivotally supporting the slide rail 6 and the slide rail 6 can be manufactured. It becomes easy and the rigidity of the slide rail 6 can be prevented from lowering.

At the rear of the bracket 9, a lock plate 20 as a "lock mechanism" rotatable around a front end shaft 19 is mounted. This lock plate 20
It has a substantially L shape having a portion extending rearward from the front end shaft 19 and a portion extending downward. Further, between the lock plate 20 and the bracket 9, a lock plate 2 is provided.
There is provided a spring 21 for urging the rotation of 0 downward.
The portion extending rearward of the lock plate 20 extends rearward from the rear end of the bracket 9, and a first engagement portion 20 a and a second engagement portion 20 b are respectively recessed at the lower end of the portion. A roller 16 provided at the lower end of the seat back 11 can be engaged with the inside of the first engagement portion 20a and the second engagement portion 20b. These first
Since the engaging portion 20a and the second engaging portion 20b are respectively recessed diagonally rearward, the engaged rollers 16
Is restricted, but the rearward movement along the lower edge of the roller 16 is possible. A lock release wire 22 is provided at the lower end of the lock plate 20. By pulling this wire 22, the lock plate 20 is rotated upward, and the first engagement portion 20 of the roller 16 is rotated.
a to the second engagement portion 20b.

The roller 16 of the seat back 11
Is engaged with the first engagement portion 20a, the seat back 11 is in a normal use state in which the seat back 11 stands up at a predetermined angle,
In a state where the seat back 11 is engaged with the second engagement portion 20b, the seat back 11 is in a reclining state in which the seat back 11 is greatly inclined rearward. Forming the first engagement portion 20a in the lock plate 20 is the same as the conventional one, but the lock plate 20 has the second engagement portion 2 for obtaining the reclining state.
There has been no example of forming Ob together.

From the reclining state, the seat back 11
Occurs, the roller 16 is disengaged from the second engagement portion 20b and automatically engages with the first engagement portion 20a, so that a normal use state is established. If the seat back 11 is further raised in a state where the seat cushion 10 has been inverted in advance as described above, the roller 16 is disengaged from the lock plate 20, and
The seat back 11 can be largely turned forward. When the seat back 11 is largely rotated forward, the roller 16 moves to the rearmost position along the slide rail 6, and the seat back 11 is in an inverted state in which the back surface 11a is horizontal at that position. The seat back 11 is in an inverted state,
Its front end (top end) rests on a support (not shown)
The inverted state is maintained.

Next, the third seat 2 according to this embodiment
Will be described in order.

Normal use state (FIG. 1): seat back 11
When the lower roller 16 is engaged with the first engagement portion 20a of the lock plate 20, the seat back 11 is in a normal use state in which the seat back 11 stands up at a predetermined angle. The occupant can sit on the third seat 2 in a normal posture with the seat cushion 10 in a normal use state with the surface facing upward.

Reclining state (FIG. 2): By pulling the wire 22 for unlocking, rotating the lock plate 20 upward and engaging the roller 16 of the seat back 11 with the second engagement portion 20b, The seat back 11 can be in a reclining state in which the seat back 11 is largely inclined rearward. As described above, since the reclining state of the seat back 11 can be obtained by forming the second engagement portion 20b on the existing lock plate 20, a dedicated reclining mechanism is not required, and the support structure of the seat back 11 is simplified. it can.

First reversal state (FIG. 3): When the seat back 11 is lifted upward from the reclining state (or a normal use state), the roller 16 is moved from the second engagement portion 20b (and the first engagement portion 20a). Because it comes off, seat back 11
Can be turned to the front side as it is to bring it into a horizontal inverted state. Also, if the seat cushion 10 is also rotated forward and the tip 13a of the operation lever 13 is engaged with the first engagement portion 14a of the latch plate 14, the seat cushion 10 is brought into the horizontal first inverted state. Become. By doing so, the back surface 11a of the seat back 11 and the back surface 10a of the seat cushion 10 become substantially the same height,
The occupant can sleep straight on the third seat 2 more than in the reclining state. Further, when the occupant does not sleep, the luggage room R is in an expanded state, so that more luggage can be loaded.

Second reversal state (FIG. 4): When the operating lever 13 is lifted and its tip 13a is engaged with the second engaging portion 14b, the back surface 10a of the seat cushion 10 is lowered forward by a predetermined angle θ. Into the second inverted state. The reclining angle of the seat back 4 of the second seat 1, which is the front seat, is increased by the amount that the seat cushion 10 is in the second inverted state, and the reclining performance of the second seat 1 is improved. That is, as shown in FIG. 3, when the seat cushion 10 is in the horizontal first inverted state, even if the seat back 4 of the second seat 1 is tilted to the rear side, it immediately hits the seat cushion 10 and the seat back 4 is sufficiently Although the seat cushion 10 cannot be reclined to the rear side, the seat back 4 reclines more rearward by setting the seat cushion 10 in the second reversing state of the front down as described above.

[0029]

According to the first aspect of the present invention, since the lock mechanism has the first engagement portion and the second engagement portion, the roller at the lower end of the seat back can be engaged with the first engagement portion. Thus, the normal use state of the seat back can be maintained, and the seat back can be brought into the reclining state by engaging the roller with the second engagement portion. As described above, the reclining state of the seat back can be obtained by using the existing lock mechanism, so that the support structure of the seat back does not become complicated.

According to the second aspect of the present invention, the roller can be moved from the second engaging portion to the first engaging portion while the roller is along the lower edge of the lock plate. Just raise it and the seat back will automatically be in normal use.

According to the third aspect of the present invention, since the seat cushion is simply turned forward about the front end fulcrum as the reversing structure of the seat cushion, the structure is simple and the reversing operation is easy.

According to the fourth aspect of the present invention, since the end of the back link is pivotally supported by the bracket erected near the slide rail, the end of the back link is pivotally supported by the slide rail. It is not necessary to perform the above processing, and the slide rail can be easily manufactured, and the rigidity of the slide rail can be prevented from lowering.

[Brief description of the drawings]

FIG. 1 is a side view showing a normal use state of a third seat according to an embodiment of the present invention.

FIG. 2 is a side view showing a reclining state.

FIG. 3 is a side view showing a first inverted state.

FIG. 4 is a side view showing a second inverted state.

FIG. 5 is a side view showing a lock plate.

FIG. 6 is a perspective view showing a latch plate.

FIG. 7 is a sectional view taken along the line SA-SA shown in FIG.

FIG. 8 is a sectional view taken along the line SB-SB shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 second seat (front seat) 2 third seat (rear seat) 4 front seat back 6 slide rail 9 bracket (peripheral member) 10 seat cushion 10 a back 11 seat back 11 a back 12 front end fulcrum 13 operation lever (lock mechanism) 13 a Tip 14 Latch plate (lock mechanism) 14a First engagement portion 14b Second engagement portion 16 Roller 18 Back link 19 Front end shaft 20 Lock plate (Lock mechanism) R Luggage room

Claims (4)

[Claims] 1. A seat cushion and a seat back, each of which can be freely moved back and forth by a slide rail, and each of which rotates and turns horizontally, and a back surface of the seat cushion and a back surface of the seat back are substantially at the time of turning over. At the same height, a roller is provided at the lower end of the seat back so as to protrude outward in the vehicle width direction, and the roller is slidably engaged with a slide rail fixed to the floor in a forward and backward direction. A lock mechanism that engages with the roller is provided, and an intermediate fulcrum above the roller of the seat back and an intermediate portion of the slide rail or a peripheral member thereof are connected by a back link, and the lock mechanism is released to release the seat back. By sliding the rollers back, the seat back pivots forward and the vehicle flips horizontally. Wherein the lock mechanism includes a first engagement portion that engages with a roller of the seatback in a normal use state, and a second engagement portion that engages with a roller of the seatback in a reclining state. A flattened seat structure for an automobile, comprising: 2. The flattened seat structure for an automobile according to claim 1, wherein the lock mechanism is formed by a lock plate that is urged to rotate downward about a front end shaft. A first engaging portion and a second engaging portion are respectively provided on the edge, and the roller is movable from the second engaging portion to the first engaging portion while the roller is along the lower edge of the lock plate. A flat seat structure for an automobile, characterized in that: 3. The flattened seat structure of an automobile according to claim 1, wherein the seat cushion is turned from a normal use state to a front side around a front end fulcrum to be in a horizontal inverted state. A flattened seat structure for an automobile. 4. The flattened seat structure for an automobile according to claim 1, wherein a bracket as a peripheral member is erected near the slide rail. A flat seat structure for an automobile, wherein an end of a back link is pivotally supported.