JPS6343962Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention was developed in an automobile, etc. by folding the front seat back into the front of the rear seat cushion so that the front and rear seats can be placed in a continuous, almost horizontal state. The present invention relates to a seat track stopper device for a fully flat seat.

As mentioned above, in the case of full flat sheets,
Because the front seat backs must be folded forward toward the rear seat cushions, the front seats must be slid forward a greater distance than in the case of normal seats.

However, if the front seat slides a large amount forward, it becomes impossible to use the passenger restraint seatbelt that is fixed to the seatbelt anchorage provided on the body side. The slide amount cannot be increased indefinitely.

For this reason, conventionally, the front seat seat back length and/or the rear seat seat cushion length has been shortened so that the front seat seat back can be folded in front of the rear seat seat cushion.

However, in this case, there is a problem in that the shortening of the length of the front seat back or the rear seat cushion reduces the riding comfort of these seats.

This invention was made in view of the above-mentioned conventional problems, and without shortening the length of the front seat back and/or the length of the rear seat cushion.
A further object of the present invention is to provide a seat track stopper device for a fully flat seat that allows the seat to slide sufficiently forward when the seat is fully flat without disabling the use of the seat belt.

This idea is provided on the seat cushion side,
a retractable seat-side stopper protruding outward from the seat cushion; and a retractable seat-side stopper disposed at a position to abut the protruding seat-side stopper when the seat cushion moves forward by a predetermined amount or more;
a body-side stopper that restricts further forward movement of the seat cushion; and a body-side stopper that is connected to the seat-side stopper and pivots in response to the tilting angle of a seatback that is pivotally supported by the seat cushion. By providing a swinging lever that drives the seat-side stopper to a retracted position where it does not come into contact with the body-side stopper when the tilt angle of the seat back is greater than a certain value, the seat back can be moved forward sufficiently only when the seat back is tilted significantly. The above object is achieved by ensuring a sufficient amount of slide.

Further, in the seat track stopper device for a full flat seat, the swing lever is fixed by swinging integrally with the seat back and engaging with a reclining adjuster pawl on the seat cushion side. When the tilt angle of the seat cushion is below a certain value, the tip is urged against the outer periphery of the ratchet at a position where the tip can come into contact with the ratchet, and the tilt angle of the seat cushion is set to a constant value. As described above, when the tip of the swing lever comes off the outer periphery of the ratchet, the seat side stopper can be retracted to achieve the above object.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in the figure, this embodiment is provided on the seat cushion 1 side, and the seat cushion 1
a retractable seat-side stopper 2 that protrudes outward from the seat; A body-side stopper 3 that restricts further forward movement of the seat cushion 1 is operated in accordance with the tilting angle of the seatback 4 pivotally supported by the seat cushion 1, and when the tilting angle of the seatback 4 exceeds a certain value. A seat track stopper device for a full flat seat is formed by a stopper drive device 5 which drives the seat side stopper 2 to a retracted position where it does not come into contact with the body side stopper 3 at this time.

The stopper driving device 5 swings integrally with the seat back 4 and moves the seat cushion 1 against a ratchet 7 which is fixed by engaging with a reclining adjuster pawl 6 on the seat cushion 1 side. A swing lever 8 is provided whose tip end is biased against the outer periphery of the ratchet 7 at a position where the tip can come into contact when the tilt angle is below a certain value, and when the tilt angle of the seat cushion 1 is above a certain value. When the tip of the swing lever 8 comes off the outer periphery of the ratchet 7, the seat-side stopper 2 can be retracted.

As shown in FIGS. 2 and 3, the seat side stopper 2 is guided by a guide 10 to the side surface of a lower arm 9, which is a structural member of the seat cushion 1, so as to be movable in the vertical direction. It is suspended by 11.

This pin 11 is supported by passing through a vertically elongated hole 8A formed at the tip of the swing lever 8 in the stopper driving device 5 in a substantially horizontal direction, and is supported at the end opposite to the seat-side stopper 2. At this point, the tension spring 12 is biased substantially downward in the figure.

The body-side stopper 3 is integrally attached to the floor-side lower rail 13 constituting the seat track, and when the seat-side stopper 2 protrudes downward in the figure, it interferes with the longitudinal movement locus of its tip. It is a plate-like member that protrudes laterally to the position, and its length in the lower rail 13 direction is such that the end on the seat side stopper 2 side extends forward of the range where the seat can be fitted with a seat belt for restraining the occupant. When it moves to the limit position of
It is adapted to come into contact with the seat side stopper 2 which is in a protruding state.

Reference numeral 14 in the figure indicates an upper rail that is fitted above the lower rail 13 and integrally supports the lower arm 9.

The swing lever 8 of the stopper drive device 5 is formed into a roughly V-shape, and at the tip of the V, is pivotally supported on the side of the lower arm 9 via a swing shaft 16 that is parallel to the pin 11 and the swing shaft 15 of the seat back 4 so as to be able to swing freely within the same plane as the swing surface of the ratchet 7.

The long hole 8A is formed at one end of the swing lever 8, and a roller 8B, which is disposed around the outer periphery of the ratchet 7, is rotatably supported at the other end.

Further, the tip of the swing lever 8 on the long hole 8A side is moved in the direction in which the roller 8B comes into pressure contact with the outer periphery of the ratchet 7 by the tension spring 17, that is, the tip on the long hole 8A side is connected to the seat side stopper 2 via the pin 11. is biased in the upward direction.

The relationship between the tensile forces of the two tension springs 12 and 17 is such that the tension spring 17 resists the sum of the tension force of the tension spring 12 and the weight of the seat-side stopper 2, the swing lever 8, and the pin 11, and moves the swing lever. 8, so that its roller 8B can be urged to roll against the outer periphery of the ratchet 7.

Furthermore, the length in the vertical direction of the elongated hole 8A formed at one end of the swing lever 8 is such that even when the seat side stopper 2 is placed on the upper surface of the body side stopper 3, the swing lever 8 is , is pushed by the outer periphery of the ratchet 7 via the roller 8B, and is within a range in which it can swing clockwise in FIG.

Reference numeral 18 in FIG. 2 indicates an upper arm which is a structural member of the seat back 4, and reference numeral 19 in FIG. 1 indicates a rear seat.

Next, the operation of the above embodiment will be explained.

First, when the seat back 4 is in the position shown by the solid line in FIGS. 1 and 2, its tilt angle is small, so the roller 8B of the swing lever 8 is moved to the ratchet 7 that is integral with the upper arm 18 on the side of the seat back 4. It is located at the position pushed clockwise in FIG. 2.

Therefore, the elongated hole 8A formed at the tip of the swing lever 8 assumes a downward position, and the pin 11 passing through this elongated hole 8A is pulled downward by the tension spring 12, thereby , the seat-side stopper 2 is projected to the solid line position shown in FIGS. 2 and 3.

When the seat stopper 2 is protruded downward, even if the seat cushion 11 and the seat bag 4 are moved forward along the seat track in this state, the seat stopper remains at the front limit position where the seat belt can be attached. 2 collides with the body-side stopper 3 provided on the lower rail 13, making it impossible to slide any further forward.

Therefore, in this embodiment, when the inclination angle of the seat back 4 is small, the forward sliding of the seat cushion 1 and the seat back 4 is always limited only within the seat belt attachment range.

When the seat back 4 is tilted backwards to full flat or an angle close to this, the ratchet 7
2 rotates together with the upper arm 18 in the clockwise direction in FIG.

The swing lever 8 is moved to the second position by a tension spring 17.
Since the roller 8B is biased counterclockwise in the figure, it comes off the outer periphery of the ratchet 7 and falls counterclockwise.

At this time, the pin 11 passing through the elongated hole 8A formed at one end of the swinging lever 8 is also lifted by the swinging lever 8, so that the The seat-side stopper 2 is also lifted upward and retracted.

Therefore, in this state, even if the seat cushion 1 and the seat back 4 are moved significantly forward,
Since the seat-side stopper 2 does not collide with the body-side stopper 3, the seat back 4 can be moved to the forward limit of the seat track, and as shown by the two-dot chain line in FIG. Together with the seat cushion 19A of the rear seat 19, it can be placed in a substantially horizontal direction, that is, in a fully flat state.

When the seat back 4 is raised from the fully flat state as described above, the swinging lever 8 is swung clockwise in FIG. 2 through a process reverse to that described above.

At this time, the lower end of the seat-side stopper 2 comes into contact with the upper surface of the body-side stopper 3, but the pin 11
The elongated hole 8A of the swinging lever 8 through which the pin 11 passes is preset to have a clearance in the vertical direction. , the swing lever 8 etc. will not be damaged.

In this state, when the seat is returned to the rear, the seat-side stopper 2 passes over the rear end of the body-side stopper 3 and is projected downward, returning to the initial state again.

In the above embodiment, the body side stopper 3 is provided integrally with the lower rail 13 of the seat track, and the seat side stopper 2 can protrude to a position where it interferes with the body side stopper 3. The idea is not limited to this,
The seat side stopper 2 is configured to protrude or retract from the seat cushion 1 side depending on the inclination angle of the seat cushion 1, and the body side stopper 3 is located on the body side including the lower rail 13, for example, on the floor side. Protruding seat side stopper 2
Any device that interferes with the object and restricts its forward movement may be used.

Further, in the above embodiment, the seat stopper 2 is urged in the protruding direction by the tension spring 12, but this is caused by the weight of the seat stopper 2 or by the swing lever 8. You may also choose to do so.

Also, the swing lever 8 for the seat side stopper 2
The elongated hole 8A forming the relief may be a notch with an open upper end.

Since the present invention is constructed as described above, the seat can be moved forward by a greater distance than the normal position only when the tilt angle of the seat back is above a certain value. It has the excellent effect of being able to be in a fully flat state without shortening the cushion length.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing the front seat and rear seat of an automobile in which the seat track stopper device for a full flat seat according to the present invention is implemented, and Fig. 2 is a seat track stopper device for a full flat seat according to the present invention. FIG. 3 is a sectional view taken along the line - in FIG. 2. DESCRIPTION OF SYMBOLS 1... Seat cushion, 2... Seat side stopper, 3... Body side stopper, 4... Seat back, 5... Stopper drive device, 6... Reclining adjuster pawl, 7... Ratchet, 8
...Swinging lever, 8B...Roller, 9...Lower arm, 13...Lower rail.

Claims (1)

[Claims for Utility Model Registration] (1) A retractable seat-side stopper that is provided on the seat cushion side and projects outward from the seat cushion, and that moves the seat cushion forward by a certain amount or more. a body-side stopper that is disposed at a position abutting the seat-side stopper in the protruding state and restricts further forward movement of the seat cushion; a swinging lever that is swung in response to the tilting angle of the seatback, and that drives the seat-side stopper to a retracted position where it does not come into contact with the body-side stopper when the seatback tilting angle is equal to or greater than a certain value; A seat track stopper device for a full flat seat, comprising: (2) The swing lever swings integrally with the seat back and is fixed at a tilting angle of the seat cushion with respect to a ratchet which is fixed by engaging with a reclining adjuster pawl on the seat cushion side. When the tip is below a certain value, the tip is urged against the outer periphery of the ratchet at a position where the tip can come into contact, the tilting angle of the seat cushion is above a certain value, and the tip of the swing lever is pressed against the outer periphery of the ratchet. The seat track stopper device for a fully flat seat according to claim 1, wherein the seat side stopper is retractable when the seat is removed from the seat.