JPH0515225Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle seat equipped with a seat back portion that can be reclined and rotated forward and whose back surface can be used as a table.

[Prior Art] A conventional vehicle seat equipped with a seat back portion that can be reclined and rotated forward and whose back surface can be used as a table is shown in FIGS. 5 to 7.

In Fig. 5, 1 is a seat back frame;
2 is a seat cushion frame, 3 is a reclining device, 3a is a base of the reclining device, 4 is a first rotating member, and 5 is a second rotating member. A screw hole 1c is formed at the tip end of each of the flat leg ends 1a and 1b on both sides of the lower part of the seatback frame 1, and a pivot hole 1d is formed above the screw hole 1c. has been done. Upper end side 4 of the first and second rotating members 4 and 5
a, 5a include screw holes 1c and pivot holes 1 formed in the leg ends 1a, 1b of the seat back frame 1.
Holes facing d are provided respectively, and the leg ends 1a, 1b of the seat back frame 1 and the first and second holes are respectively provided.
The upper end sides 4a and 5a of the rotating members 4 and 5 are connected to the first and second shafts 4s and 5s and the screw hole 1c via a stator 6 which is removable. Also,
The lower end 4e of the first rotating member 4 is pivotally connected to one leg end 2a formed in a flat shape on both sides of the rear part of the seat cushion frame 2, and the other leg end 2b is attached to the reclining device 3. base 3
It is fixed at a. The lower end 5e of the second rotating member 5 is gear-coupled to the reclining device 3, and by operating the reclining device 3, the second rotating member 5 can freely rotate around the reclining device 3. There is. A vehicle seat is formed by placing a cushioning material S over the frame constructed as described above, and covering the cushioning material S with a surface layer material (not shown).

With the above configuration, normally when the seat back part 1A is used as a backrest, the first and second rotating members are fixed to the leg ends 1a and 1b of the seat back frame 1 by the stator 6, and the seat back frame 1 itself is rotated. Make it immobile. By operating the reclining device 3 in this state, the seat back frame 1 and the first rotating member 4 are rotated in the longitudinal direction in conjunction with the second rotating member 5, and the angle of the seat back portion 1A can be adjusted. When it is desired to use the back side of the seat back part 1A as a table, the stator 6 is removed and the seat back frame 1 itself is made rotatable via the first and second shafts 4s and 5s, and the seat back is moved as shown in FIG. Rotate part 1A forward. Note that the back surface of the seat back portion 1A is reinforced to provide strength as a table.

[Problems to be Solved by the Invention] However, according to the conventional vehicle seat, the lower end 4e of the first rotating member 4 is pivotally connected to the leg end 2a of the seat cushion frame 2 for reclining. As a result, when the seat back portion 1A is rotated forward when used as a table, the first rotating member 4 rotates about the pivot point with the leg end 2a of the seat cushion frame 2. This caused the problem that the seat back portion 1A was twisted as shown in FIG. 7, and a good forward-folding condition could not be maintained. Further, there was a problem in that the force due to this twisting was applied to the first and second rotating members, making these members more likely to break.

The purpose of the present invention is to prevent the seat back portion 1A from twisting even when the seat back portion 1A is folded forward.
To obtain a vehicle seat that can maintain a good forward-folding state and whose members are hard to break.

[Means for Solving the Problems] A first rotating member and a second rotating member are suspended horizontally, one end is attached to the second rotating member via a connecting piece, and a second rotating member is attached to the other end. It has a protrusion that protrudes in the direction of the first rotating member, and when this protrusion is fitted into a fitting hole formed in the first rotating member, the other end becomes the first rotating member.
A connecting member attached to the rotating member is provided.

[Function] The first rotating member rotates in conjunction with the frame only when the reclining device is operated, and when the seat back itself is rotated forward when the seat back is used as a table, the first rotating member rotates in conjunction with the frame. Rotation is prevented.

[Embodiment of the invention] Hereinafter, an embodiment of the invention will be described in detail based on FIGS. 1 to 4. Components that are the same as those in the conventional example shown in FIGS. 5 to 7 are designated by the same reference numerals, and their explanation will be omitted.

In each figure, 7 is a first rotating member, 8 is a second rotating member, and 9 is a connecting member horizontally suspended between the first rotating member 7 and the second rotating member 8. This connecting member 9 is shaped like a hollow pipe, and one end thereof 9
A joint member 10 having a protrusion 10a is fitted into the opening 9s of a, and this joint member 10
The protrusion 10a is fitted into a fitting hole 7s formed in the lower end 7a of the first rotating member 7. Further, one end side 9a of the connecting member 9 is rotatably inserted into a fitting hole 11s formed at the other end 11b of the connecting piece 11, which is connected to one leg end 2a of the seat cushion frame 2. installed. Further, the other end side 9b of the connecting member 9 is welded to a connecting piece 12 that is welded to the inner side 8a of the second rotating member 8. Note that during this welding, the welding location is positioned so that the axis 9c of the connecting member 9 coincides with the rotation centers of the first and second rotating members.

With the above configuration, normally when the seat back part 1A is used as a backrest, the stator 6 fixes the first and second rotating members 7 and 8 to the leg ends 1a and 1b of the seat back frame 1, and the seat back frame 1 Make itself unrotatable. When the reclining device 3 is operated in this state, the connecting member 9 rotates in conjunction with the second rotating member 8, and the joint member 10 also rotates, causing the first rotating member 7 to rotate. That is, the joint member 10 is the first rotating member 7
Since this is the center of rotation of the seat back frame 1 and is directly driven via the connecting member 9, the seat back frame 1 can be rotated more smoothly. When it is desired to use the back side of the seat back part 1A as a table, the stator 6 is removed and the seat back frame 1 itself is connected to the first and second shafts 4s,
The seat back part 1A can be rotated through 5s.
Rotate forward. At this time, the first rotating member 7 is prevented from rotating by the joint portion 10 of the connecting member 9, and will not rotate unless the reclining device 3 is operated. Therefore, even if the seat back portion 1A is rotated forward, the first rotating member 7 does not move, so the seat back portion 1A does not twist and can maintain a stable forward tilted state. Further, since the seat back portion 1A does not twist, no force due to twisting is applied to the first and second rotating members, and there is no possibility that these members will break.

In the above embodiment, the axis of the connecting member 9 is the first,
Connecting member 9 so that it is at the center of rotation of the second rotating member.
However, the same effect can be obtained by fixing both ends to the pivot portions above the first and second rotating members.

[Effects of the invention] As explained above, according to the invention, the first rotating member and the second rotating member are horizontally suspended, and one end is attached to the second rotating member via the connecting piece. At the same time, the other end has a protrusion that protrudes in the direction of the first rotating member, and when this protrusion is fitted into the fitting hole formed in the first rotating member, the other end is rotated in the first rotating member direction. Since the connecting member attached to the member is provided, even when the seat back part 1A is folded forward, the seat back part 1A does not twist, and a good state of folding forward can be maintained.
A vehicle seat whose members are hard to break can be obtained.

[Brief explanation of the drawing]

1 to 4 show an example of a vehicle seat according to the present invention, in which FIG. 1 is a schematic perspective view of the main parts, FIG. 2 is a partially exploded view, FIG. 3 is a sectional view of FIG. 1, and FIG. The figures are perspective views showing the seat back part, Figures 5 to 7.
The figures are an overall perspective view and an explanatory view showing an example of a conventional vehicle seat. 1... Seat back frame, 2... Seat cushion, 3... Reclining device, 4
s, 5s...first and second axes, 6...stator, 7...
...first rotating member, 8... second rotating member, 9... connecting member.

Claims (1)

[Claims for Utility Model Registration] First and second seats pivotally attached to both sides of the rear part of the seat cushion frame so as to be rotatable in the front and back direction.
A rotating member, a reclining device that adjusts the angle of one of the first rotating members, and a reclining device that extends in the front-rear direction via the first and second rotating shafts on the upper side of each of the first and second rotating members. A vehicle seat comprising a rotatably pivoted seat back frame and first and second removable stators that unrotatably fix the seat back frame to the first and second rotating members, A projection that is horizontally suspended between the first rotating member and the second rotating member, has one end attached to the second rotating member via a connecting piece, and has the other end projecting in the direction of the first rotating member. and a connecting member whose other end is attached to the first rotating member by fitting the protrusion into a fitting hole formed in the first rotating member. sheet.