JPS641342B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automobile seat equipped with a reclining mechanism that adjusts the inclination angle of a seat back and a sliding mechanism that adjusts the longitudinal position of the seat, particularly an automobile seat suitable for van-type vehicles. It is.

Such a van-type vehicle is known from Japanese Utility Model Publication No. 55-14578. In recent years, laws and regulations have been established for van-type vehicles that the luggage area must be larger than the passenger compartment, and the passenger compartment and luggage compartment are separated by a partition such as a partition bar. There is.

By the way, when using a car seat with a reclining mechanism and a sliding mechanism as the rear seat in a six-seater van type car, etc., the rear seat must be slid backwards in order to avoid leaving enough space in the passenger compartment. If the seat back is tilted significantly backwards in this state, the cargo space will be infringed upon and the above-mentioned laws and regulations cannot be complied with. Further, even if an automobile seat equipped with the above two mechanisms is adopted, there is no point in adopting it if the backward tilting is restricted.

This invention has been made in view of this problem, and maintains a predetermined relationship between the reclining state and the sliding position of the seat, so that when the seat is slid backward from the set position, the seat back The basic objective is to provide an automobile seat that blocks the reclining of the seat.

Therefore, the basic feature of the present invention is that a backward tilt prevention mechanism is provided which blocks the reclining mechanism and makes it inoperable when the seat is slid backward from the set position.

Hereinafter, the present invention will be described in more detail based on illustrated embodiments.

As shown in FIG. 1, an automobile seat 1 has a seat bottom 2 and a seat back 3, and the seat bottom 2 is moved onto a passenger compartment floor 5 by a seat slide adjuster 4 having a well-known structure. The seat back 3 is supported by a fixed seat frame 6 so as to be slidable in the front and back direction.
The reclining nut 7, which is provided between the seat bottom 2 and has a well-known structure, can adjust its inclination arbitrarily between the most forward tilted position A shown by the solid line and the most forward tilted position B shown by the two-dot chain line. It has a basic structure connected to the seat bottom 2 so that the angle can be adjusted.

In the present invention, as is clear from FIG. 1, when the seat back 3 is tilted backward by operating the reclining knuckle 7 while the seat bottom 2 is positioned at the rear sliding position, the cargo space A shown by diagonal lines is moved. Since the headrest 3a of the seat bag 3 may protrude during
The seat back 3 cannot be reclined when the seat 1 is located behind the set position.

FIG. 2 shows a structure for this purpose.

In FIG. 2, 11 is a lower bracket fixed to the rear side of the seat bottom 2, 12 has an upper part fixed to the side of the seat back 3, and a lower part supported by a support shaft 13 of the lower bracket 11. Upper bracket 14 is an operating lever for releasing a lock mechanism (not shown) provided between lower bracket 11 and upper bracket 12;
These constitute the reclining knuckle 7.

Further, the seat slide adjuster 4 is attached to a lower rail 15 fixed to the seat frame 6 and to the bottom surface of the seat bottom 2.
5, an operating rod 18 supported by bearings on the side of the upper rail 16 by an operating rod support bracket 17 fixed to the upper surface of the upper rail 16;
A locking bracket 20 (fixed to the lower rail 15) extends parallel to the upper rail 16 between the operating rod 18 and the upper rail 16, and has a large number of locking holes 19, . . . , 19 at a constant pitch.
It is made up of.

As shown in FIG. 2, in this embodiment, in addition to the above basic configuration, a backward tilt detection lever 21 that follows the rearward tilt of the upper bracket 12 is rotatably supported on the lower bracket 11 by a shaft 22. Meanwhile, the operating rod support bracket 17 on the upper rail 16
A lock lever 23 for disabling operation of the operating rod 18 is swingably supported on the top by a shaft 24. The lower end of the first lever part 21a that extends downwardly of the backward tilt detection lever 21 and the inner end 23a of the lock lever 23 that extends inwardly across the upper rail 16 are attached to both ends of the connecting link 25, respectively. The connecting fittings 26, 26 are attached, and the backward tilt detection lever 21 and the lock lever 23 are connected by the connecting link 25 so as to be interlocked.

The backward tilt detection lever 21 is biased in the hour hand direction C of the shaft 22 by a coil spring 35 via the lock lever 23 and the connecting link 25, and the upper part of the lever 21 is biased inward (toward the upper bracket 12 side). ) The detection piece 27 bent at the angle of
8 and protrudes into a punched window provided at the lower part of the upper bracket 12. For this detection piece 27, an inward stopper 30 for abutting the detection piece 27 is provided at the edge of the punched window of the upper bracket 12 in the direction of the hour hand.
By following the detection piece 27 in contact with the upper bracket 12, the backward tilted position (angle) of the upper bracket 12 can be detected.

Further, an engagement piece 31 is formed in the middle part of the rearward tilt detection lever 21 by slightly extending backward, and the seat 1
When the seat 1 is not in the most forward position, in other words, when the seat 1 is being slid rearward, the engaging pin 32 protruding outward from the rear end extension 14a of the operating lever 14 is locked and operated. It is possible to disable the release operation of the lever 14.

On the other hand, the lock lever 23 is provided with a cam 33 at the end 23b opposite to the connecting end 23a, and the cam 33 is located above the central notch 17a of the bracket 17 and is attached to the operating rod 18. It is designed to be releasably connected to the implanted engagement pin 34. This lock lever 23 has a bracket 1.
A coil spring 35 is engaged from 7 to bias the lock lever 23 in the counterclockwise direction D of the shaft 24. Further, on the end 23b side of the lock lever 23, a bending piece 36 is provided that protrudes downward from the center notch 17a of the bracket 17, and when the upper rail 16 is slid to its rearmost position, this bending piece 36 is provided. An engagement step 37 is provided on the rear side of the lock bracket 20, which engages the curved piece 36 and rotates the lock lever 23 around the hour hand against the spring force.

Next, the operation of the above structure will be explained for each seat inclination angle and slide position.

() When the seat back is in the most forward position and the seat is in the most forward position. When the seat back 3 is in the most forward position and the seat 1 is in the most forward position, the upper bracket 12 is moved as shown in Figure 3. stoppa 3
0, the backward tilt detection lever 21 is held in the most upright state, and the engagement piece 31 of the backward tilt detection lever 21 is in a position where it does not engage the engagement pin 32 of the operating lever 14. On the other hand, on the seat slide adjuster 4 side, a lock lever 23 is connected to the rear tilt detection lever 21 via a connecting link 25.
is held in a position substantially perpendicular to the sliding direction, and in this state, the engagement pin 34 implanted in the operating rod 18 is in a position to engage with the inclined portion 33a of the cam 33 of the lock lever 23.

Therefore, the reclining knuckle 7 and the seat slide adjuster 4 are each operable.

That is, when the operating lever 14 of the reclining knuckle 7 is lifted in the F direction against the spring force of the spring 39 suspended between it and the lower bracket 11, the locking gear 40 is moved by the cam portion 14a of the operating lever 14. When the upper pin 41 is pushed, the lock gear 40 and the sector gear 42 of the upper bracket 12 are disengaged, the upper bracket 12 is unlocked, and the seat back 3 can be reclined to any rearward tilting position. can.

In addition, when operating the seat slide adjuster 4, when the operating lever 18 is rotated in the direction of arrow G against the spring force of the wire spring 43 applied between the operating lever support bracket 17, the engagement pin 34 is the inclined cam portion 3 of the lock lever 23
3a is forcibly pushed up to rotate the lock lever 23 in the direction of the hour hand of the shaft 24 against the spring force of the coil spring 35.
3, the backward tilt detection lever 21 is rotated in the counterclockwise direction C' via the connection link 25.
Therefore, the engagement piece 31 of the backward tilt detection lever 21 goes around below the engagement pin 32 of the operating lever 14 . Therefore, seat slide adjuster 4
is operable, but when operating the seat slide adjuster 4, the reclining knuckle 7 becomes inoperable.

() When the seat back is tilted backwards and the seat is in the most forward position, as shown in Figure 4, the operating lever 14
When the seat back 3 is tilted backward by pulling up, the backward tilt detection lever 21 follows the rearward tilt of the upper bracket 12, and the lock lever 23 is rotated in the counter-hour direction D around the shaft 24 by the spring force of the coil spring 35, and the lock lever 23 is connected. The link 25 is pulled in the direction of the arrow H and rotates around the shaft 22 in the direction of the hour hand C.
At this time, the lock lever 23 locks the engagement pin 34 of the operating rod 18 with the lock portion 33b of the cam 33. This lock makes the operating rod 18 inoperable, and the seat slide adjuster 4 cannot slide the seat rearward. That is, if the seat 1 is slid rearward while the seat back 3 is tilted rearward, it may protrude into the luggage compartment space, as described with reference to FIG.

Therefore, when you want to slide the seat 1 rearward, first return the seat back 3 to its most forward position, and then move the seat slide adjuster 4.
(See Figure 3).

() When the seat back is in the most forward tilted position and the seat is in the intermediate slide position, when the seat back 3 is in the most forward tilted position, the lock lever 23 locks the engagement pin 34 of the operating rod 18 as described above. Therefore, the seat slide adjuster 4 can be operated even when the seat 1 is in the intermediate slide position.

Now, as shown in FIG. 5, when the operating rod 18 is rotated in the direction of arrow G, the engagement pin 34 of the operating rod 18 pushes the oblique portion 33a of the cam 33 of the lock lever 23, and the lock lever 23 is moved toward the shaft 24. The lock lever 23 is rotated in the direction of the hour hand D', and finally falls into the oblique portion 33a or the depressed portion 33c, thereby holding the lock lever 23 at the rotational position shown.

By this rotation of the lock lever 23, the backward tilt detection lever 21 is pushed via the connecting link 25, and is rotated around the shaft 22 in the counterclockwise direction C' against the biasing force of the spring. 21 engaging piece 3
1 goes around below the engagement pin 32 provided on the rear end extension 14a of the operating lever 14. For this reason,
The operating lever becomes inoperable, and when the seat 1 is in the intermediate slide position, the reclining knuckle 7 is prohibited from tilting the seat back 3 backward.

() When the seat back is in the most forward tilted position and the seat is in the most retracted position, when the seat 1 is slid to the most retracted position, the bent piece 36 of the lock lever 23 explained in FIG. 20, and as a result, as shown in FIG.
is rotated against the spring force of. Therefore, the backward tilt detection lever 21 moves in the counterclockwise direction around the shaft 22.
C', and the operating lever 1 is rotated by the engaging piece 31.
The engaging pin 32 is locked from below so that the operation 4 cannot be performed.

Further, in this state, the engagement pin 34 of the operating rod 18 is held in a position separated from the cam 33 of the lock lever 23, so that the operating rod 1
8 can be operated without being hindered by the cam 33.

Note that the backward tilt detection lever may have a divided structure as shown in FIG. 7. That is, the first lever 50 having a right angle shape, which has a connecting portion 50b with the connecting link 25 and an engaging piece 51 for the engaging pin 32 of the operating lever 14 at both ends, comes into contact with the stopper 30 of the upper bracket 12. A second lever 53 having a piece 52 is provided and is pivotally supported on the lower bracket 11 by a common shaft 54.
The coil spring 55 is tensioned from the first lever 50 side so as to contact the stopper 30.

In this structure, the second lever 53 is maintained in a state in which it is always in contact with the stopper 30 of the upper bracket 12, so the stroke of the second lever 53 is different from that of the integral structure (as shown in FIG. 2). This has the advantage that the structure of the lever 21 can be reduced compared to the structure of the lever 21).

It should be noted that other parts of the embodiment shown in FIG. 7 are the same as those described with respect to FIG. 2, so the same reference numerals are given and further explanation will be omitted.

In the embodiments described above, the seat back can be tilted rearward only when the seat is in the most forward position, but the present invention is not limited to this. That is, the setting position for disabling the reclining operation of the seat back is not limited to the most forward position, but can be set at any appropriate rear position.

Furthermore, it goes without saying that the present invention is not limited to the above-mentioned embodiments, and that various mechanisms can be employed within the scope of the technical idea of the present invention.

As is clear from the above explanation, according to the present invention, when the seat is slid backward from the set position, the backward tilting of the seat back can be blocked, and when used as a rear seat of a van-type vehicle, etc. , it has the advantage of being able to fully recline without violating laws and regulations.

Although the above description has been made of a van-type vehicle, it goes without saying that the present invention is not limited to van-type vehicles and can also be suitably used for wagons.

[Brief explanation of drawings]

FIG. 1 is a side view of an automobile seat for explaining the background of the invention, FIG. 2 is a perspective view of an embodiment of the invention, and FIGS. 3, 4, 5, and 6 are FIG. 7 is a perspective view similar to FIG. 2 showing a modification of the above embodiment. 1... Car seat, 2... Seat bottom,
3... Seat back, 4... Seat slide adjuster, 7... Reclining nut, 14...
...Operation lever, 23...Lock lever, 25...
Connection link, 31...Engagement piece, 32...Engagement pin, 33...Cam, 34...Engagement pin.

Claims (1)

[Scope of Claims] 1. An automobile seat equipped with a reclining mechanism that adjusts the inclination angle of the seat back with respect to the seat bottom, and a slide mechanism that adjusts the longitudinal position of the seat, comprising: a lower bracket attached to the seat bottom; An engaging piece that can be freely engaged and detached is rotatably supported on the operation lever of the reclining mechanism, and this engaging piece and a lock lever attached to the seat slide mechanism are connected by a connecting member,
When the seat is located behind the set position,
An automobile seat characterized in that backward tilting of the seat back is prevented by engagement between an operating lever and an engagement piece.