JP2578444B2 - Automotive seat slide device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat slide device for an automobile, and more particularly to a seat slide device with a walk-in.

(Prior art)

2. Description of the Related Art A conventional seat slide apparatus for an automobile is disclosed in, for example, Japanese Patent Publication No. 54-574 and Japanese Utility Model Publication No. 57-28671.

In the case of a vehicle seat slide device, when a claw of a lock member for stopping the front seat at a desired position in the front-rear direction is broken in the event of a collision of the vehicle, the front seat is re-established. It moves to the forward position, contacts an appropriate stopper, and stops.

[Problems to be solved by the invention]

However, according to the related art, when the space of the most advanced position of the seat and the space of the front leg are too small, the space of the front of the most advanced position of the seat is too small, such as at the time of the collision of the vehicle as described above. In this case, since the knees or the like of the seated person may be injured by contacting the front wall in the vehicle interior, the distance between the front end of the front seat at the most advanced position and the front wall cannot be made too small. Conversely, if the distance is increased, there is a problem that the front seat is obstructed when getting on and off the rear seat, making it difficult to get on and off.

The present invention has been made in view of such a conventional problem, and has as its object to ensure safety and facilitate getting on and off a rear seat.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a fixed rail extending back and forth and juxtaposed to a vehicle body, a movable rail slidably engaged with each of the fixed rails, and an upper part of the movable rail. A reclining device supporting a backrest so as to be capable of tilting forward to one of the seats; an unlocking operation of operating means supported by the movable rail; and a tilting forward of the reclining device. A latch provided on the movable rail so as to be disengaged from an engagement portion of a lock plate fixed to the fixed rail by operation;
A help spring for urging the movable rail to move to the most advanced position when the latch comes off the fixed rail, wherein the lock plate has an upper part on a vertical wall on which the engaging portion is formed. A stopper is formed by providing a step in a part of the latch, a movable portion that moves at the same height as the stopper is formed at a rear portion of the stopper, and a retaining member is juxtaposed at a rear of the latch. In this way, the holding member always stops sliding by sliding on the movable portion of the lock plate and abutting against the stopper portion,
A seat slide device for an automobile, wherein the backrest portion is configured to be movable so as not to come into contact with the stopper portion when the backrest portion is tilted forward.

(Operation)

Since the present invention has such a configuration, when adjusting the front-rear position of the seat in accordance with the occupant sitting on the seat and the body length, the operating means is operated in a required direction to release the latch from the engaging portion. By moving the seat part back and forth, the seat part moves to a desired position. At this time, since the backrest is upright, the holding member is at a position where it can come into contact with the stopper portion. When the seat is advanced to a predetermined standard position, the holding member comes into contact with the stopper portion and the seat is raised. The forward movement is prevented.

That is, the seat cannot be advanced beyond the standard position.

When the user releases the operating means at this position, the latch is engaged at the position of the engaging portion at that time, and the seat is locked at that position.

Next, when getting on and off the seat behind the seat,
When the backrest portion of the seat is tilted forward, the latch and the retaining member are pulled by the reclining device, the latch is disengaged from the engaging portion, the movable rail is advanced by the help spring, and the retaining member is the stopper portion of the lock plate. , So that the seat can be moved forward from the standard position.

Furthermore, in the event of a collision of the vehicle, even if the latch is broken, the retaining member abuts against the stopper of the lock plate, and further advancement is hindered, so that the seat is moved forward from the standard position. Can be reliably prevented.

〔Example〕

1 to 10 are views showing an embodiment of the present invention.
Reference numeral 1 denotes a vehicle seat. The vehicle seat 1 includes fixed rails 5, 5 which extend back and forth and are juxtaposed to a vehicle body 2 via leg brackets 3, 4. Movable rails 6, 6 slidably engaged with each other, and a seat 9 fixedly mounted on the upper portions of the movable rules 6, 6 via spacers 7, 7, and 8
And a backrest so that it can be tilted forward to one of the sides of the seat 9.
10 and a reclining device 11 supported by the movable rail 6 and an unlocking operation of an operating means 12 supported by one of the movable rails 6 (that is, rotating the operating means 12 in the direction of arrow B) and a front of the reclining device 11. The engagement of the lock plates 14, 14 fixed to the fixed rails 5, 5 by a tilting operation (that is, the arm 11a of the reclining device 11 is tilted forward by pulling the operation ring 13 backward (in the direction of arrow A)). Latches 16, 16 provided on the movable rails 6, 6 so as to be disengaged from the parts 15, 15,..., And the latches 16, 16 are provided on the lock plates 14, 14 of the fixed rails 5, 5.
Help springs for urging the movable rails 6, 6 to move to the most advanced position when they are disengaged from the engaging portions 15, 15,.
17 and has. The lock plate 14 is provided with a stepped portion at a part of the upper edge rib surface 21 as an upper portion of the vertical wall 20 formed with the plurality of engaging portions 15, 15.
22 and the rear part of the stopper part 22 is the stopper part
A movable portion 23 which moves at the same height as 22 is formed, and a retaining member 30 is arranged side by side at the rear of the latch 16, and the retaining member 30 is always attached to the vertical wall 20 of the lock plate 14. The movement is stopped by sliding on the movable portion 23 and abutting against the stopper portion 22, and when the backrest portion 10 is tilted forward, it can be moved so as not to abut against the stopper portion 22. It is composed.

A roller 40 and a ball 41 are interposed between the fixed rail 5 and the movable rail 6 for smooth sliding between the fixed rail 5 and the movable rail 6, and the positioning member 42 prevents the roller 40 and the ball 41 from moving. It has become.

The base 11b of the reclining device 11 is supported by the spacer 8 and fixed to the upper edge 51 of the bracket 50. As shown in FIG. 9, a bell crank 53 pivotally supported by a pin 52 so as to be freely rotatable horizontally is supported on the upper edge portion 51, and one ends of a first wire 60 and a second wire 61 are supported on one side, respectively. The other end supports one end of a third wire 62 whose other end is connected to the operation ring 13.

The operating means 12 is connected to a first bracket 70 supported by one of the movable rails 6 via a pin 71 and a lever body 12a.
Is horizontally rotatably supported, and one end 1 of the lever body 12a
A knob 72 is fixed to 2b, and the other end 12c is also engaged in a hole 73 formed in the latch 16. And the knob
When 72 is rotated in the direction of arrow B, the other end 12c moves the latch 16 in a direction to come off from the engagement portion 15. Sign
74 is a spring pivotally supported by the pin 71.
The other end 12c of 12a urges the latch 16 in a direction that does not come out of the engagement portion 15. In the middle of the lever body 12a, a latch (not shown) provided on the other movable rail 6 is connected via a fourth wire 63 as shown in FIG.
When the 12a is rotated in the direction of arrow B, both slide locks are released.

The operation ring 13 is arranged at the rear foot of the seat 9.

The latch 16 is provided with holes 75, 7 of a first bracket 70 supported on one of the movable rails 6 similarly to the operation means 12.
It is slidably supported between the five. The claw 76 of the latch 16 is formed in a forked shape, and the first wire 60 is supported in the through hole 77 on the opposite side of the claw 76, and the other end of the first wire 60 is connected.

As shown in FIG. 2, the help spring 17 includes a bracket 80 fixed to one front of the fixed rail 5 and a bracket fixed to the rear of the movable rail 6 on the same side.
It is a coil-shaped member stretched between 81.

One end of the holding member 30 is supported so as to be slidable between the holes 32 of the second bracket 31 supported by one of the movable rails 6. A coil-shaped spring 34 is interposed between the retaining member 30, the pin 33 implanted at one end, and the second bracket 31, and the retaining member 30 is on the movable portion 23 of the lock plate 14. It is urging. The second wire 61 is engaged and supported in the through hole 35 at the other end of the holding member 30.

Therefore, according to the present embodiment, when the occupant rotates the lever body 12a of the operating means 12 in the B direction, the latch 16
6 is disengaged from the position shown by the solid line from the position shown by the broken line in FIG. 6, that is, from the engaging portion 15, and the movable rail 6 can slide back and forth with respect to the fixed rail 5. When the seated person moves forward or backward from this state, the movable rail 6 moves forward or backward. At this time, since the backrest portion 10 is standing up, the seat portion 9 is set to a predetermined standard. When the holding member 30 is advanced to the position, the holding member 30 comes into contact with the stopper portion 22 and the seat portion 9 is prevented from further advancing. That is, the seat cannot be advanced beyond the standard position.

When the user releases the operating means 12 at this position, the latch 16
Engages at the engaging portion position at that time, and locks the seat portion 9 at that position.

Next, when getting on and off the seat behind the seat 9,
When the backrest portion 10 of the seat 1 is tilted forward, the latch 16 and the holding member 30 are pulled by the reclining device 11, and the latch 16 is disengaged from the engagement portion 15 and the help spring 17 is released.
As a result, the movable rail 6 moves forward, and the holding member 30 does not come into contact with the stopper portion 22 of the lock plate 14 as shown in FIG. 8, so that the seat portion 9 can move forward from the standard position.

Furthermore, even if the latch 16 is damaged in the event of a collision with an automobile, the retaining member 30 abuts against the stopper portion 22 of the lock plate 14 to prevent further advancement. The seat 9 can be reliably prevented from advancing.

(Effect)

As described above, according to the present invention, a fixed rail extending back and forth and juxtaposed to a vehicle body, a movable rail slidably engaged with each of the fixed rails, and a movable rail And a reclining device that supports a backrest so as to be tiltable forward on one of the seats, a lock release operation of operation means supported by the movable rail, and a reclining device for the reclining device. A latch provided on the movable rail so as to be disengaged from an engagement portion of a lock plate fixed to the fixed rail by a forward tilting operation, and the movable rail moves to a most advanced position when the latch comes off the fixed rail. A help spring biasing the lock plate, wherein the lock plate is provided with a step on a part of an upper portion of the vertical wall on which the engagement portion is formed to form a stopper portion, The rear portion of the topper portion forms a movable portion that moves at the same height as the stopper portion, and a retaining member is arranged side by side at the rear portion of the latch, and the retaining member allows the lock plate to move at all times. The movement is stopped by sliding on the upper portion and abutting against the stopper portion, and the backrest portion can be moved so as not to abut against the stopper portion by tilting the backrest portion forward. Therefore, the following effects can be obtained.

(1) When the occupant adjusts the front-rear position, the seat does not move forward from the standard position, so that the occupant's knee or the like hits the front wall in the vehicle cabin and is not injured.

(2) If the latch claw is broken in the event of an automobile collision, the forward movement of the seat from the standard position is prevented by the abutment member abutting against the stopper. Highly safe.

(3) When getting on and off the rear seat, the front seat can be moved further forward beyond the standard position by tilting the backrest of the front seat forward. The ease of getting on and off is significantly improved.

[Brief description of the drawings]

1 to 10 show an embodiment of the present invention. FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG.
FIG. 5 is a cross-sectional view taken along line IV-IV in FIG. 2, FIG. 5 is a cross-sectional view taken along line VV in FIG. 2, and FIGS. DESCRIPTION OF SYMBOLS 1 ... Car seat, 2 ... Body, 5 ... Fixed rail, 6 ... Movable rail, 9 ... Seat part, 10 ... Backrest part, 11
... reclining device, 12 ... operating means, 14 ...
Lock plate, 15… engaging part, 16… latch, 17…
Help spring, 22 stopper part, 23 movable part, 30 retaining member.

Claims (1)

(57) [Claims] 1. A fixed rail extending back and forth and juxtaposed to a vehicle body, a movable rail slidably engaged with each of the fixed rails, and a seat fixed to an upper portion of the movable rail. Part, a reclining device supporting a backrest portion so as to be capable of tilting forward to one of the seats, and an unlocking operation of operating means supported by the movable rail and a forward tilting operation of the reclining device to the fixed rail. A latch provided on the movable rail so as to be disengaged from the engaging portion of the fixed lock plate; and a help spring for urging the movable rail to move to the most advanced position when the latch is disengaged from the fixed rail. The lock plate has a stopper formed by providing a step on a part of the upper part of the vertical wall on which the engaging portion is formed, and a stopper is formed at a rear portion of the stopper. A movable portion that moves at the same height as the movable portion, and a retaining member is arranged side by side at the rear of the latch, and the retaining member always slides on the movable movable portion of the lock plate. The seat slide device for an automobile is characterized in that the movement is stopped by abutting against the stopper portion so that the backrest portion can be moved forward so as not to abut against the stopper portion when the backrest portion is tilted forward. .