JPH0232121Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotation adjustment mechanism for a body restraint frame of a vehicle seat.

Generally, when a child is seated in a vehicle seat, a child seat is installed. However, there was a risk that the infant would fall out of the child seat due to the vehicle's rolling or braking, resulting in an unexpected accident. In response to this problem, it has recently been proposed (unknown to the public) to attach a body restraint frame to a vehicle seat to restrain an infant. As shown in FIG. 1, the body restraint frame 2, which normally constitutes the outer peripheral portion of the seat back portion 1, is formed into a substantially U-shape with a horizontal portion 3 and a pair of leg portions 4, 5. When in use, the body restraint frame 2 rotates toward the seat cushion part 7 using the shaft 6 at the lower end of the legs 4, 5 as a fulcrum and is locked in a horizontal state by a locking mechanism (not shown). It is designed to surround the abdomen. However, since this body restraint frame 2 is always maintained in a horizontal state during use, it is often unsuitable for some infants.

Therefore, the object of the present invention is to solve the above-mentioned drawbacks by providing a rotation adjustment mechanism in the body restraint frame so that it can be locked in a position other than the horizontal position.
The present invention will be described in detail below using examples.

2 to 6 are diagrams showing one embodiment of the rotation adjustment mechanism of the body restraint frame of the vehicle seat of the present invention. In FIG. 2, the vehicle seat includes a seat cushion part 9, a seat back part 10, and a safety pillow 11.
Consists of. The safety pillow 11 is attached by inserting a stay 13 into a hole 12 formed above the seat back portion 10. The body restraint frame 14 is rotatably attached to the side surface of the seat back portion 10. The body restraint frame 14 has a horizontal portion 15 and a pair of legs 16, 1 extending perpendicularly from both sides of the horizontal portion 15.
7, it is formed into a substantially inverted U-shape, and normally constitutes the outer periphery of the seat back portion 10. A hole 18 for receiving the stay 13 of the safety pillow 11 is formed in the horizontal portion 15. The rotation adjustment mechanism 8 has a fixing plate 19 embedded within the seat back portion 10, as shown in FIGS. 3 to 6. A lock plate 20 is fixed to the leg portion 17 side of the body restraint frame 14 of the fixed plate 19. The lock plate 20 has a shaft 22 attached to a frame 21 provided inside the body restraint frame 14.
a screw hole 23 that is screwed into the threaded end of the
and a plurality of lock holes 26, 27, 28, 29 for receiving the tip 25 of the lock shaft 24. The lock holes 26, 27, 28, 29 are located on a circumference centered on the shaft 22. Lock plate 20 of frame 21
A rotation bearing 30 is provided on the side. The rotary bearing 30 has a hole 31 through which the shaft 22 is inserted and which is coaxial with the screw hole 23 of the lock plate 20, and a hole 32 through which the lock shaft 24 can be inserted. The lock shaft 24 is inserted into a through hole 50 provided so as to penetrate from the outside to the inside of the leg portion 17 of the body restraint frame 14, and passes through the hole 21A of the frame 21 and the hole 32 of the rotary bearing 30 to lock the lock plate. 20 lock holes 26,2
7, 28, 29, and has a handle 33 on the outer protruding side of the leg 17. The lock shaft 24 is provided with a stopper 34 that comes into contact with the surface of the rotary bearing 30 on the frame 21 side. This stopper 34 and frame 2
A spring 35 as a biasing means is interposed between the lock shaft 24 and the rotary bearing 30 to bias the lock shaft 24 toward the rotary bearing 30. A guide tube 36 is arranged between the handle 33 of the lock shaft 24 and the frame 21. As shown in FIG. 5, the guide tube 36 has an oblique guide hole 37 formed in the longitudinal direction. The lock pin 38 attached to the lock shaft 24 through the guide hole 37 of the guide tube 36 is guided along the guide hole 37 when the lock shaft 24 is rotated by the handle 33, and rotates around the lock shaft 24 in the axial direction. It is now being moved to The screw hole 23 of the lock plate 20 is inserted through the frame 21 and the rotation bearing 30.
The shaft 22 screwed together attaches the body restraint frame 14 to the seat back portion 10, and allows the body restraint frame 14 to freely rotate back and forth about the shaft 22 as a fulcrum. A recess 39 is formed in the front part of the seat cushion part 9, and a cushion element 40 is normally stored in this recess 39.
can be folded back at the hinge part 41, so that when the cushion element body 40 is folded back and stacked, it can be used as a child seat.

According to the above configuration, when the body restraint frame 14 is rotated toward the seat back portion 10, the lock shaft 2
The tip 25 of the lock plate 20 is fitted into the lock hole 26 of the lock plate 20 as shown in FIGS. 3 and 4. The safety pillow 1 is inserted through the hole 18 in the horizontal part 15 of the body restraint frame 14.
Remove the stay 13 of 1. Next, attach the handles 33 on the outer surface of the leg portions 17 of the body restraint frame 14 to the seat cushion portion 9.
When rotated to the side, the lock shaft 24 rotates and the lock pin 38 is pulled out along the guide hole 37 of the guide tube 36. As a result, the lock shaft 24 compresses the spring 35 toward the frame 21 with the stopper 34, and the lock shaft 24 Move the handle in the direction of handle 33. The tip 25 of the lock shaft 24 is detached from the lock hole 26 of the lock plate 20 as shown in FIG.
is in a state where it can be rotated toward the seat cushion portion 9. When the body restraint frame 14 is rotated, for example, as shown in FIG. 7, the lock shaft 24 also rotates on the circumference around the shaft 22. Lock the lock shaft 2 so that the tip 25 of the lock shaft 24 is in the lock hole 28 of the lock plate 20.
4, and when it is located in the lock hole 28, the handle 3
3 is released, the guide pin 38 moves backward in the guide hole 37 of the guide tube 36 due to the restoring force of the spring 35, rotating the lock shaft 24 toward the seat back portion 10, and the tip 25 of the lock shaft 24 rotates around the shaft 22. It is fitted into a lock hole 28 provided on the circumference. As a result, the body restraint frame 14 is locked in a slightly inclined position as shown in FIG. By rotating the cushion body 40 rearward with a hinge 41, it can be used as a child seat. Place the stay 13 of the safety pillow 11 into the hole 1 of the seat back part 10.
Insert into 2.

To rotate the body restraint frame 14 toward the seat back portion 10, remove the stay 13 of the safety pillow 11 from the hole 12 in the seat back portion, and then remove the handle 33 as described above.
to the seat cushion part 9 side and lock the lock shaft 2.
4, the guide pin 38 moves within the guide hole 37 of the guide tube 36, the spring 35 is biased toward the frame 21 by the stopper 34, and the lock shaft 24 moves in the direction of the leg 17 of the body restraint frame 14. Then, the tip 25 of the lock shaft 24 separates from the lock hole 28. By rotating the body restraint frame 14 toward the seat back portion 10 and releasing the handle 33 when the tip 25 of the lock shaft 24 is positioned coaxially with the lock hole 26 of the lock plate 20, the spring 35 is restored and the guide pin 38 is released. The lock shaft 24 moves through the guide hole 37 so that the tip 25 of the lock shaft 24 fits into the lock hole 26.
Move to the 0 side. As a result, the body restraint frame 14 is locked on the seat back portion 10 side. safety pillow 11
By inserting the stay 13 into the hole 18 of the horizontal portion 15 of the body restraint frame 14 and storing the cushion body 40 in the recess 39, a normal vehicle seat can be obtained.

As explained above, according to the present invention, the leg portions of the substantially U-shaped body restraint frame 14 forming the outer periphery of the seat back portion 10 of a vehicle seat are attached to the seat back portion 10 so as to be rotatable. A lock plate 20 having a plurality of holes 27, 28, 29 located on the circumference is provided on the seat back part 10 side, and is inserted into a through hole 50 provided so as to penetrate from the outside to the inside of the leg part. The lock shaft 24, which can move forward and backward in the directions of the holes 27, 28, and 29 of the lock plate 20, is always connected to the holes 27, 28, and 2 of the lock plate 20.
Since the body restraint frame 14 is attached to the body restraint frame 14 so as to be biased in nine directions by the biasing means, the body restraint frame 14 can be locked at a desired position among a plurality of predetermined lock positions. As a result, physical restraint frame 1
4 can be adapted according to the infant.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a vehicle seat having a conventional body restraint frame, FIG. 2 is a perspective view of a vehicle seat having a body restraint frame rotation adjustment mechanism of the present invention, and FIG. FIG. 4 is a front view of the lock plate, FIG. 5 is a perspective view of the guide tube, and FIG. 6 is a cross-sectional view of the main part of the invention. FIG. 7 is a perspective view of the vehicle seat locked in one tilted state of the body restraint frame. 14...Body restraint frame, 19...Fixing plate, 20...
...Lock plate, 21...Frame, 22...Shaft, 2
3...Screw hole, 24...Lock shaft, 26-29...
... Lock hole, 33 ... Handle, 34 ... Stopper, 35 ... Spring, 36 ... Guide tube, 3
7... Guide hole, 38... Guide pin.

Claims (1)

[Scope of utility model registration request] In a rotation adjustment mechanism having a shaft 22 for rotatably attaching a leg portion of a substantially U-shaped body restraint frame 14 forming the outer periphery of a seat back portion 10 of a vehicle seat to the seat back portion 10, A plurality of holes 27, 28, 2 located on the circumference
A lock plate 20 having a diameter of 9 is provided on the side of the seat back part 10, and is inserted into a through hole 50 which is provided so as to penetrate from the outside of the leg part inward. The lock shaft 24 is movable forward and backward, and the lock shaft 24 is always connected to each hole 27, 2.
A rotating adjustment mechanism for a body restraint frame of a vehicle seat, characterized in that the body restraint frame 14 is attached to the body restraint frame 14 so as to be biased in the 8 and 29 directions by a biasing means.