JPS6342035Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicle seat, and particularly to a vehicle seat whose seat back portion can be shifted forward and backward.

Conventionally, a vehicle seat consists of a seat cushion part 1 and a seat back part 2 as shown in FIG. 1, and the seat back part 2 is shifted from the rear 3 side of the seat cushion part 1 to the front 4 direction. It has been proposed that the passenger can sit both forward-facing and rear-facing.

The front surface 5 side of the seat back section 2 has an uneven shape that matches the shape of the passenger's back side and is set to have a predetermined cushioning force, and a pocket section 7 is attached to the rear surface 6 side. Therefore, if such a seat back portion 2 is shifted as it is in the four directions at the front of the seat cushion portion 1, when an occupant is seated facing rearward, the back of the occupant will be stuck to the pocket portion 7 and the relatively hard portion of the seat back 2. Moreover, since it hits the flat rear surface 6 side, it has the disadvantage that it becomes extremely uncomfortable to sit on.

Further, a safety pillow 8 is attached to the upper part of the seat back part 2 so as to be able to move up and down, but if the seat back part 2 is shifted forward as it is, the pillow 8
Since the occupant's head hits the rear surface 9 side of the vehicle, the passenger's head has a disadvantage in that the head hits poorly.

The object of the present invention is to cut out at least the approximately central part of the seatback part where the passenger's back rests, and provide a rotatable cushion part in this hollowed part. The above-mentioned drawbacks are eliminated by ensuring that the cushion surface of a preferable uneven shape and hardness is always in contact with the passenger's back by moving the cushion, and will be described in detail below using examples.

2 to 6 are simplified configuration diagrams showing one embodiment of the vehicle seat according to the present invention. In the figures, 10 is a seat cushion portion, 11 is a seat back portion, and the approximately central portion of the seat back portion 11 is a seat back portion. This hollow hole 12 is provided with a cushion portion 13 having an area that closes the hollow hole 12, and the cushion portion 13 has a back surface 14 side that can hold the occupant's back most softly. The uneven shape and hardness are set so that the front surface 14 side can face either the front section 15 side or the rear section 16 side of the seat cushion section 10. A safety pillow 17 is movably held and is further provided on the upper side of the seat back portion 11.
is attached to form a pair with the cushion section 13, and the safety pillow 17 can be rotated in conjunction with the rotation of the cushion section 13. The cushion portion 13 is attached to the side wall of the seat back portion 11.
A stopper part 18 is provided for locking the position of the seat cushion part 10. This stopper part 18 is engaged with lock parts 19 provided on both sides of the rear part of the cushion part 13, so that the front surface 14 of the cushion part 13 is fixed to the seat cushion part 10. It can be set so that it faces the front 15 side and the rear 15 side.

A rectangular frame 20 is embedded in the seat back portion 11 along the outer periphery of the seat back portion 11, and a rectangular frame 20 extending parallel to the frame 20 is also embedded in the cushion portion 13.
As shown in FIG. 5, a bracket 23 for holding a pin 22 projecting upward is fixed to the horizontal portion 20a on the lower side of the frame 20, and the pin 22 is always kept in the upper part. A force such that the pin 22 protrudes in the direction is applied by the spring 24, and the pin 22 is pressed downward against the spring force of the spring 24,
By inserting it into the cylindrical body 25 fixed to the lower horizontal portion 21a of the frame 21, the lower part of the cushion portion 13 can be rotatably pivoted. Further, a holder 27 is fixed to the upper horizontal portion 20b of the frame 20, which has a cylindrical shape and has a locking groove 26 on the upper edge side, as shown in FIG.
A cylindrical bearing 28 is housed in this holder 27, a rib 29 provided on the bearing 28 fits into the locking groove 26, and a flange 31 protruding from the lower part of the bearing 28 is located at the lower end of the holder 27. By abutting on the side, rotation and pulling out of the bearing 28 can be prevented, and a rotatable rotating body 33 having a flange 31 and a locking part 32 is attached to the bearing 28. Note that the locking portion 32 of the rotating body 33 comes into contact with the lower end 34 side of the bearing 28 and cannot be pulled out, and the rotating body 33 is provided with a through hole 35 having a rectangular cross section that extends in the vertical direction. ,
A plate-shaped support member 36 that protrudes downward from the bottom side of the vehicle safety pillow 17 passes through the through hole 35 , and a notch 37 is provided on the side wall side of the support member 36 . A linear spring 38, which will be described later, is engaged, and the height of the safety pillow 17 can be adjusted by engaging one of the notches 37 with this spring 38. A holder 40 having a rectangular through hole 39 is fixed to the upper horizontal portion 21b of the frame 21.
A fixing member 42 having a hole 41 for inserting the supporting member 36 is fitted into the fixing member 42, and a locking portion 43 provided on the lower side of the fixing member 42 comes into contact with the lower end side of the holder 40. This makes it possible to prevent the fixing member 42 from being pulled out. In this case, a notch 44 is formed in the side wall of the fixing member 42, and the spring 38 is attached so as to surround a portion corresponding to the notch 44, with a portion of the spring 38 being exposed on the hole 41 side. It can be locked on the notch 37 side. Therefore, when rotational force is applied to the frame 21, the rotational force acts on the support member 36 attached to the fixed member 42, and as a result, the rotating body 33 rotates relative to the bearing 28, so that the frame 21 and the safety pillow 17 are rotated. They will rotate as one.

The stopper portion 18 has a lever 47 that pulls the pin 46 in the horizontal direction against the spring 45, and the tip side of the pin 46 is connected to the lock portion 19.
The fixing piece 48 is inserted into the locking hole 49 of the fixing piece 48 provided on the side wall of the frame 21 constituting the frame 21, thereby locking the rotation of the frame 21. The fixing member 48 is provided with an inclined surface that presses the pin 46 when it comes into contact with the pin 46.

Therefore, according to the above configuration, the seat back portion 1
1 to the side of the front part 15 of the seat cushion part 10, the lever 18 is operated to pull out the pin 46 from the hole 49, and the cushion part 13 is rotated about the pin 22 and the rotating body 33 as a fulcrum. , and set it so that its front side 14 faces the rear side. As a result, the tip of the pin 46 comes into contact with the inclined surface of the fixed piece 48 and slides, and the pin 48 retreats into the rear hole 49.
The cushion part 13 is locked with the cushion part 13 facing the rear side. Therefore, the front surface 14 of this cushion portion 13 can softly hold the back side of an occupant seated on the seat cushion portion 10 facing the rear side, and furthermore, a safety pillow can be attached to the cushion portion 13. 17 also faces toward the rear, so it can be held softly on the passenger's head side.

As explained above, according to the vehicle seat according to the present invention, the center side of the seat back part is hollowed out,
This hollowed out part is provided with a cushion part that is rotatable integrally with the head rest using the bearing part provided at the center of the upper and lower sides as a fulcrum, so that the cushion part and the head rest can be rotated. The cushion portion and the headrest can be easily turned over without requiring any driving means. In addition, by setting the front side of this cushion part to a concave-convex shape and hardness that gives the occupant the most comfort, the occupant's back can always be held softly even when the seat back is shifted forward or backward. Furthermore, even if the pocket is provided on the rear side of the seat cushion, the pocket can be used without coming into contact with the passenger's back.

[Brief explanation of drawings]

FIG. 1 is a side view showing an example of a conventional vehicle seat, and FIGS. 2 to 6 are a perspective view, a sectional view, and a plan view showing an embodiment of the vehicle seat according to the present invention. 10... Seat cushion part, 11... Seat back part, 13... Cushion part, 14... Front, 17... Safety pillow, 18... Stopper part, 1
9... Lock section.

Claims (1)

[Scope of utility model registration request] In a vehicle seat having a seat back part that can be freely shifted forward and backward of a seat cushion part, the center side of the seat back part is hollowed out,
A vehicle seat characterized in that the hollowed out part is provided with a cushion part which is rotatable integrally with the headrest using a bearing part provided at the central part of the upper and lower sides as a fulcrum.