JPH0872596A - Seat for automobile - Google Patents

Abstract

PURPOSE: To improve the cushioning characteristic of a seat cushion in a seat for an automobile which is formed so as to be completely flat. CONSTITUTION: A seat for an automobile comprises a seat back SB mounted on the floor of an automobile so as to be tilted by a reclining device, a seat cushion SC, arms 41 and 42 provided in the front end of the seat cushion SC and mounted on the floor, a hook 1 provided in the seat back SB side of the seat cushion SC and a striker 2 provided in the seat back SB and engaging with the hook from a lower part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat in which a step is not generated between a seat cushion and a seat back when the seat back is tilted in a full flat state.

[0002]

2. Description of the Related Art A conventional automobile seat of this type is, for example, one disclosed in Japanese Utility Model Laid-Open No. 60-90032. This is because when the seat back is tilted backward by the reclining device, the fixing piece that is fixed to the seat back side and has its tip protruding in the seat cushion direction is
The rear part of the movable plate, which is pivotally mounted in the cushion frame of the seat cushion so as to be rotatable in the front-rear direction, is gradually lifted upward, and the seat surface of the seat cushion and the back surface of the seat back tilt the seat back backward. It is designed to be a full flat shape when it is horizontal.

[0003]

Therefore, in the above conventional products, since the movable plate which is separate from the cushion frame is provided in the seat cushion, the cushioning property of the seat cushion is not only bad due to the rigid movable plate. However, there is a problem in that the structure becomes complicated because the movable plate has to be movable in the seat cushion. Therefore, the present invention aims to eliminate such defects of the conventional products.

[0004]

A vehicle seat according to the present invention for achieving the above object comprises a seat back tiltably mounted on a vehicle floor via a reclining device fixed to the vehicle floor, and a seat back below the front end. A seat cushion whose front end side is rotatably pivoted in the front-rear direction with respect to the vehicle floor via a protruding arm. The seat cushion is attached to the rear side of the cushion frame in the seat back direction and is engaged downward. An object of the present invention is to include a hook having a joint cutout portion, and a striker that is fixed to the back frame of the seat back and is engaged in the engaging cutout portion of the hook.

[0005]

[Function] When the striker engaged with the hook of the seat cushion is lifted upward as the seat back is tilted backward, the rear side of the seat cushion is lifted upward through the hook, centering on the shaft attachment portion of the arm. . Then, when the seat back is tilted backward in a substantially horizontal state, the rear portion of the seat cushion and the seat cushion side of the seat back are in a substantially flat and substantially flat state.

[0006]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a state before the seat cushion (SC) and the seat back (SB) are installed on the vehicle floor side. The seat back (SB) is tiltably installed on the vehicle floor via a reclining device (R). Illustrated seat back (S
In B), one side portion on the left and right sides is attached to the vehicle floor by a reclining device (R), and the other side portion is attached to the vehicle floor by a Hinge connection.

On the other hand, the seat cushion (SC) has arms (41) (43) projecting downward from the front end of its bottom portion.
The brackets (40) and (42) fastened to the vehicle floor are pivotally mounted by hinge pins. A hook (1) is attached to the center of the rear side of the pipe cushion frame (44) in the seat cushion (SC). In the figure, (45) is a seat cushion (SC)
And a trim cover for covering the cushion body (45).

The seat back (SB) includes upper brackets (31) (33) integrally fastened to the left and right sides of a back frame (34) of the seat back (SB),
A lower bracket (30) (32) fastened to the vehicle floor is rotatably pivotally attached by a hinge pin (37) (37), and a reclining device (R) is attached to one upper bracket (31) and the lower bracket (30). ) Is attached, and the hinge pin is tilted in the front-rear direction around the pivotally attached portion (37).

A striker (2) engaging with the hook (1) is welded to the back frame (34) on the seat back (SB), and the striker (2) is made of a rigid metal rod. Bend it in a roughly U shape,
Both free ends are welded to the back frame (34), and the tip side is parallel to the back frame (34) and the hinge pin (37).
The seat back (SB) is positioned so as to be located downward with respect to the pivot portion by (37), and the reclining device (R).
It is formed so as to be lifted upward as it tilts backward. This tip side is the engaged portion (2A).
In the figure, (35) is a foam cushion body that constitutes the seat back (SB), and (36) is the trim cover.

FIG. 2 shows a hook (1) which is an essential part of the present invention.
And striker (2). The hook (1) is composed of a movable part (1A) and a fixed part (1B) for mounting the movable part (1A) within a fixed rotation range. The fixed part (1B)
Is a substantially U-shaped metal piece welded to the cushion frame (44), and the insertion holes (20) (20) (20) (20) of the pin (18) rotatably pivotally mounting the movable part (1A) on both side pieces of the metal piece. ) Is provided with a rear stopper portion (16) (16) formed in a wing shape on the rear seat back side, and a front stopper portion (17) is provided upward on the front side.

The movable part (1A) has a front piece (13) for fixing the strap (15) to the tip, and the front piece (13).
And a side piece (12) extending at right angles downward from the left and right sides of the left and right sides of the left and right side pieces (12) (12), and the engaging notch (11) having a downward opening on the front side. ) In the vertical direction and in the upper part of the engagement notch (11), and a long hole (10) elongated in the proximal direction is provided in the horizontal direction. Further, a through hole (19) is formed in each of the left and right side pieces (12) (12), and the pin (18) is inserted into the through hole (19) so that the fixed portion (1B) is fixed. It is mounted so as to be movable within the range of rotation.

The movable part (1A) is connected to the front piece (1
The base end edge (14) of 3) is attached to the front stopper part (17) of the fixed part (1B), and the lower end edges of the left and right side pieces (12) and (12) are
Since the fixed portion (1B) is attached to the fixed portion (1B) so as to abut the rear stopper portions (16) and (16) of the fixed portion (1B), the movable portion (1A) has a constant rotation range, that is, a range of 12 degrees. Is regulated so that the movable portion (1A) is loosened in the case of a rotation range beyond that range, and if it is less than that range, the striker (2) will be unlocked later. It becomes difficult to operate.

The striker (2) has the engagement notch (1
When the striker (2) is engaged with the slot (10) from 1) and the striker (2) pivots upward due to the rearward inclination of the seat back (SB), the movable part (1A) of the hook (1) is lifted upward. . Since the movable part (1A) of the hook (1) is restricted from rotating within a certain range, when the movable part (1A) of the hook (1) is lifted upward, the hook (1) is fixed accordingly. Cushion frame (4
4) lifts the rear side upward with the shaft attachment portion of the arms (41) and (43) as the center of rotation.

3 and 4 show a normal use state of the seat. The seat cushion (SC) is placed on the vehicle floor (F), and the seat back (SB) is locked at a constant angle by a reclining device. , Seat back (SB)
The engaged portion (2A) of the side striker (2) has a long hole (1) in the hook (1) on the seat cushion (SC) side.
0) is engaged.

When the strap (15) is pulled in this state, the engaged portion (2A) of the striker (2) passes through the engaging cutout portion (11) from within the elongated hole (10) of the hook (1), It escapes from the hook (1) and the locked state is released. At that time, since the hook (1) rotates in the rotation range of 12 degrees, the strap (15) easily comes out of the engaging notch (11) of the hook (1). Then, when the strap (15) is further pulled, the seat cushion (SC) stands up by pivoting forward about the shaft attachment portions of the arms (41) and (43) as shown by the chain line. When the seat back (SB) is tilted forward on the vehicle floor (F) where the cushion (SC) is placed by the reclining device so that the back surface faces upward, the seating surface of the seat back (SB) becomes the vehicle floor (F). The back surface of the seat back (SB) becomes substantially horizontal, and the back surface can be used as a luggage carrier.

5 and 6 show a state in which the seat is in a fully flat state. When the reclining device of the seat back (SB) is operated and the seat back (SB) is tilted backward, the seat back (SB) is integrated with the seat back (SB). The striker (2) raises the hook (1) engaging the striker (2) upwards. Therefore, the seat cushion (S
The rear side of C) is lifted upward so that the rear side of the seat back (SB) is substantially flush with the lower end side of the seat back (SB).

With the rearward inclination of the seat back (SB), the engaged portion (2A) of the striker (2) slides in the elongated hole (10) of the hook (1), and then the hook ( 1) Lift up. At that time, since the hook (1) rotates within a rotation range of 12 degrees, the engaged portion (2A) of the striker (2) easily slides in the elongated hole (10), and the hook (1). Can be lifted accurately.

[0018]

According to the present invention, as the seat back is tilted backward, the entire seat cushion is lifted about the front side about the front side and the rear side is brought into a full flat state. Therefore, it is not necessary to dispose a rigid plate or the like in the seat cushion that impairs the cushioning property, and a conventional general seat cushion can be used as it is, so that the cushioning property is good and the structure is simple.

[Brief description of drawings]

FIG. 1 is a partially cutaway exploded perspective view of a product of the present invention.

FIG. 2 is a perspective view showing a main part of the present invention.

FIG. 3 is a cross-sectional view showing a normal use state.

FIG. 4 is an enlarged view of a portion A of FIG.

FIG. 5 is a cross-sectional view showing a full flat state.

FIG. 6 is an enlarged view of part B in FIG.

[Explanation of symbols]

 SC seat cushion SB seat back F car floor 1 hook 2 striker

Claims (4)

[Claims] 1. A seat back which is tiltably installed on a vehicle floor via a reclining device fixed to the vehicle floor, and an arm projecting downward from a front end so that the front end is rotatable in the front-rear direction with respect to the vehicle floor. A seat cushion that is axially mounted, a hook that is attached to the rear side of the cushion frame of the seat cushion in the seat back direction, and has a downward engaging notch, and is fixed to the back frame of the seat back and engages with the hook. A vehicle seat including a striker that engages in the notch. 2. The vehicle seat according to claim 1, wherein the hook has a rotation range in the front-rear direction regulated by a stopper fixed to the cushion frame. 3. The automobile seat according to claim 1, wherein the engagement notch is continuously formed with a long hole through which a striker slides. 4. The vehicle seat according to claim 1, wherein a strap having one end protruding above a seat cushion is fixed to the hook.