JPS6143619Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a seat backrest forward tilt restraint device equipped with a walk-in mechanism.

The purpose of this invention is to ensure the safety of the occupants by restraining the forward-leaning backrest in the overrun position, where the longitudinal position of the seat is advanced by more than the normal stroke, making it impossible to sit down. .

2. Description of the Related Art A walk-in mechanism is known in which, in order to facilitate getting in and out of a rear seat in a two-door vehicle, the backrest of a front seat is tilted forward to allow the seat to move forward, thereby increasing the aisle space.

In a seat equipped with this walk-in mechanism, even if the seat is in an overrun position, which is advanced beyond the normal stroke, the seat can be seated with the forward-leaning backrest erect. The seating position in the front and back direction varies depending on each person's physique and preferences, but if you sit in an overrun position that exceeds the normal stroke, the distance between the instrument panel and the seated person will be too close, leading to sudden stops or collisions. Occasionally, a seated person may collide with the instrument panel and be easily damaged. Further, in the overrun position, the slide rail on the lower surface of the seat overhangs the guide rail, so if a seating load is applied to this overhang portion, the support strength will be disadvantageous.

This invention prevents the seat from sitting in the overrun position to prevent the above-mentioned problems from occurring.
This allows seating to be done with the necessary distance to maintain safety.

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

FIG. 1 shows the moving state of the seat, where 1 is a seat and 2 is a backrest that can be tilted forward. The A position is an overrun position where the backrest 2 is tilted forward and moved to the frontmost end by the walk-in mechanism, and the B position is the frontmost position of the normal stroke _S1 from the rearmost end of the C position. The present invention allows the forward-leaning backrest 2 to stand up within the movement range of the normal stroke _S1 , and allows the forward-leaning backrest 2 to stand up within the range of the overrun stroke _S2 from the forward-most position of the normal stroke _S1 to the overrun-frontmost position. The person was restrained from standing up and unable to sit down.

This specific mechanism will be explained with reference to FIGS. 2 and 3. A hinge plate 6 fixed to a backrest 2 is pivotally attached to a seat part 1 by a hinge pin 7 so as to be tiltable. The lower end 6 of this hinge plate 6
An engagement pin 8 is provided protrudingly from a.

On the other hand, a stopper lever 10 whose upper end 10a abuts the engagement pin 8 is pivotally attached to the seat 1 so as to be swingable by a pin 11 and located in front of the engagement pin 8 of the hinge plate 6. There is. and,
The stopper lever 10 is always biased by a spring 12 in a direction in which it comes into contact with the engagement pin 8.

Furthermore, the guide rail 3 fixedly installed on the floor surface that slidably guides the slide rail 4 integrally connected to the frame 9 of the seat part ₁ is provided with The lower end 10b of the stopper lever 10 comes into contact with the stopper lever 1
A stopper plate 5 having a length equal to the range of the overrun stroke _S2 that restricts the zero swing is fixed. Note that the lower end 10b of the stopper lever 10 that comes into contact with the stopper plate 5 comes into contact with the stopper plate 5 and slides within the range of the overrun stroke _S2 , so that the sliding is smooth and the contact is made smooth. Although not shown, it is desirable to attach a roller to the tip end 10b or to cover it with synthetic resin in order to eliminate collision noise.

Next, the operation of the device of the present invention will be explained with reference to FIGS. 4 and 5.

In the range of the normal stroke _S1 of the seat portion 1, the stopper lever 10 does not come into contact with the stopper plate 5, as shown in FIG. 4, so that the swinging movement is possible.
Therefore, the backrest 2 can be freely positioned in the sitting usage range from the forward leaning state to the backward leaning state, and even if the backrest 2 is tilted forward and moved by the walk-in mechanism, the backrest 2 cannot be erected within the range of the normal stroke _S1 . Even when seated at the front end position of the normal stroke _S1 , there is sufficient space between the seated person and the instrument panel to maintain a safe condition.

However, when the seat 1 is moved to the range of overstroke _S2 , the lower end 1 of the stopper lever 10 is placed on the stopper plate 5 as shown in FIG.
0b comes into contact and restricts the swinging of the stopper lever 10. Therefore, even if an attempt is made to raise the backrest 2 which has been tilted forward, since the engagement pin 8 is in contact with the upper end 10a of the stopper lever 10, the locked state cannot be maintained and the backrest 2 cannot be raised. Since it is naturally impossible to sit when the backrest 2 is tilted forward, sitting at a small distance close to the instrument panel within the range of overstroke _S2 is prevented.

As described above, according to the present invention, the backrest, which is tilted forward in order to activate the walk-in mechanism, is locked in that state by a simple mechanism within the overrun stroke range of the seat, making it impossible to sit down. This has the advantage of preventing occupants from sitting close to the instrument panel at a small distance, thereby avoiding the danger of secondary collisions for occupants during sudden stops or collisions. Furthermore, since the forward tilt of the backrest is maintained within the overrun stroke range of the seat, it is impossible to sit with the slide rail overhanging the guide rail, and it is possible to sit only in a state where the support strength is advantageous. It also has the advantage of ensuring safety.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the state of movement of the seat by the walk-in mechanism, Figure 2 is a side view of the device of the present invention, and Figure 3
The figure is a sectional view showing the related structure of the device of the present invention, and FIGS. 4 and 5 are explanatory views of the operation of the device of the present invention. 1... Seat, 2... Backrest, 3... Guide rail, 5... Stopper plate, 6... Hinge plate, 7... Hinge pin, 8... Engagement pin, 1
0... Stop lever, 11... Pin, 12...
Spring, S ₁ ... normal stroke, S ₂ ... overrun stroke.

Claims (1)

[Scope of utility model registration request] A hinge plate that is fixed to the backrest and pivots at the center of tilting and turning of the backrest, and has an engagement pin located below this pivot point, and is fixed to a fixed guide rail that supports the slide rail attached to the seat. The stopper plate has a length equal to the overrun stroke of the seat, and the lower end of the stopper plate comes into contact with the stopper plate only during the overrun stroke of the back and forth movement of the seat, and the upper end is always located forward of the engagement pin and comes into contact with the engagement pin. The stopper plate and the stopper lever are pivoted to the seat and are biased with rotational force by a spring in the direction in which they touch each other. When the seat is overrun and the backrest is tilted forward, the stopper plate and the stopper lever come into contact with each other, and the stopper lever is hinged by the upper end of the stopper lever. A forward tilting restraint device for a seat backrest equipped with a walk-in mechanism, characterized in that the forward rotation of an engagement pin of a plate is restrained to prevent a forwardly tilted backrest from standing up.