JP4451017B2 - Backboard support structure for vehicle seat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a backboard support structure for a vehicle seat such as an automobile seat, and more specifically, the seatback is moved forward so that the backboard provided on the back of the seatback is in a horizontal upward direction, and the seatback is used as a table and a loading platform. The present invention relates to a support structure for a backboard in an automobile seat that can be used.
[0002]
[Prior art]
In this type of conventional vehicle seat, the backboard is moved forward in a horizontal state, and the seatback is used as a table and a loading platform.
[0003]
In addition, on the left and right sides of the seat back in the seat, a lock device that locks the seat back in use state of the table or the like is mounted, and the left and right lock devices are integrally connected by a connecting shaft.
[0004]
The back board is formed with a predetermined strength and supported by a support member provided on the back frame side of the seat back so that the back board is not deformed by a downward load when used as a table or a loading platform. .
[0005]
[Problems to be solved by the invention]
As described above, the seat back used as a table or a cargo bed must be formed with a predetermined strength so that the back board itself is not deformed. In addition, in particular, a support member that supports the center portion of the backboard needs to be fixed to the back frame of the seat back (for example, Japanese Utility Model Publication No. 1-84237).
[0006]
Accordingly, an object of the present invention is to make it unnecessary to provide a dedicated backboard support member for the back frame in such a seat back.
[0007]
[Means for Solving the Problems]
The present invention for achieving the above object is a vehicle seat in which the seat back is tilted forward so that the backboard is in an upward state, and the locking devices provided on the left and right of the seat back are connected by a connecting shaft .
A connecting shaft that is integrally connected to the left and right locking devices is formed in a crank shape, and its central portion is disposed close to the backboard in a locked state by the locking device , so that the central portion is in an upward state. It is possible to bear a downward load on the backboard of the machine .
[0008]
With the above configuration, the backboard is supported by the central portion of the crank-shaped connecting shaft that connects the locking devices mounted on the left and right sides of the seat back, so that the backboard itself is not reinforced and a dedicated backboard support member is provided. There is no need to provide it in the back frame or the like.
[0009]
In addition, since the back portion of the seat back skin is interposed between the back board and the connecting shaft so that the back board does not directly contact the connecting shaft, abnormal noise such as contact noise is generated. Can prevent.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a use state of an automobile seat having a structure according to the present invention. A seat back shown in (SB) in the figure is attached to the upper end of movable arms (5) and (5), and the movable arm (5) ( The lower end of 5) is configured to be movable in the front-rear direction by a reclining device (9) provided on the left and right of the rear part of the seat cushion (SC). In the figure, (90) shows a cover of the reclining device, and (91) shows the operation lever.
[0011]
The left and right movable arms (5) and (5) can pivot the back frame of the seat back (SB) in the front-rear direction with pivot pins on the left and right side surfaces above the lower end of the seat back (SB). It is pivotally attached.
Then, the seat back (SB) is locked in a forward-turned state, a use state, or the like by a lock device (7) (7) provided above the rotation center by the pivot pin.
[0012]
The locking devices (7) and (7) provided on the left and right sides of the seat back (SB) are integrally connected by a crank-shaped connecting shaft (2), and an operation lever (71 provided on one locking device (7) is provided. ), The locked state of the other locking device (7) is also released simultaneously via the connecting shaft (2), and a plurality of locks provided at the tip of the movable arms (5) (5) The pin is configured to be locked by engaging the hook on the back frame side.
[0013]
As shown in FIGS. 2 to 4, the connecting shaft (2) is disposed so that the center portion (20) is located behind the seat back (SB) and close to the back board (1). Both end portions (21) are rotatably inserted into the back frame sheet metal side frame portions (41).
[0014]
The upper frame part (40) and the lower frame part (42) bent in a U-shape are welded to the upper and lower sides of the side frame part (41), and the retaining wire (43) and the S-shaped spring ( 48) is horizontally mounted on the back frame, and a foam pad (8) is supported on the back frame and covered with a skin (3) sewn in a bag shape.
[0015]
As shown in FIG. 5, the back surface (3A) of the skin (3) has window holes (32) and (32) for mounting the connecting shaft (2) to the left and right locking devices (7) and (7). And through holes (33) and (33) for hooking the hooks (13) and (13) of the backboard (1) to the hooking wire (43).
[0016]
The backboard (1) is a plate made of synthetic resin such as polypropylene, and hooks (13) (13) provided on the upper part of the inner surface of the backboard (1) are hooked on the hooking wire (43), and through holes ( 14) A fastening member such as a screw is inserted into (14) and fastened to brackets (44) (44) welded rearward to the left and right of the lower frame portion (42).
[0017]
Since the back portion (3A) of the skin (3) is interposed between the fixed backboard (1) and the central portion (20) of the connecting shaft (2), the backboard (1) Does not directly contact the central portion (20) of the connecting shaft (2).
[0018]
The proximity state with respect to the backboard (1) in the central portion (20) of the connecting shaft (2) is held by the locking devices (7) and (7).
When releasing the locked state by the locking device (7), the central portion (20) of the connecting shaft (2) rotates in a direction away from the backboard (1).
[0019]
FIG. 6 shows a state in which the seat back (SB) is used as a table. In this state, the reclining device (9) raises the movable arm (5) vertically to rotate the seat back (SB) so that the back board (1) is in the horizontal state, and the locking device (7) ( It is obtained by locking according to 7).
[0020]
FIG. 7 shows a state in which the seat back (SB) is used as a loading platform. In this state, after the movable arm (5) is tilted rearward by the reclining device (9), the backboard (1) becomes horizontal upward. The seat back (SB) is moved forward and locked by the locking devices (7) and (7).
[0021]
When the above seat back (SB) is used as a table or a loading platform, since the substantially central portion of the back board (1) is supported by the connecting shaft (2), the load on the back board (1) is lowered. A part of this is borne by the connecting shaft (2) to prevent deformation of the backboard (1).
In the figure, (70) indicates a resin cover.
[0022]
【The invention's effect】
According to the present invention, since the downward load applied to the backboard can be borne by the connecting shaft, there is no need to provide a support member dedicated to the backboard on the back frame as in the prior art.
[0023]
Further, by interposing the back surface portion of the skin between the backboard and the connecting shaft, it is possible to prevent the generation of noise due to the contact between the backboard and the connecting shaft.
[Brief description of the drawings]
FIG. 1 is a perspective view of an automobile seat having a structure according to the present invention.
2 is a cross-sectional view taken along line II-II in FIG.
FIG. 3 is an enlarged view of part A in FIG. 2;
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a perspective view showing a seat back before a back board is attached.
FIG. 6 is a partially cutaway side view of a state in which the seat back is used as a table.
FIG. 7 is a partially cutaway side view of a state where the seat back is used as a loading platform.
[Explanation of symbols]
SB seat back
1 Backboard
2 Connecting shaft
3 Bag-shaped epidermis
7 Locking device

Claims (2)

In the vehicle seat in which the seatback is tilted forward so that the backboard is in the upward state, and the locking devices provided on the left and right of the seatback are connected by the connecting shaft,
A connecting shaft that is integrally connected to the left and right locking devices is formed in a crank shape, and its central portion is disposed close to the backboard in a locked state by the locking device , so that the central portion is in an upward state. A backboard support structure for a vehicle seat, characterized in that a downward load on the backboard can be borne . The backboard support structure for a vehicle seat according to claim 1, wherein a back surface portion of the skin is interposed between the backboard and the connecting shaft.

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