JPS5921059Y2 - Vehicle auxiliary chair - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an auxiliary chair for vehicles such as buses.

The use position is located at the center aisle side end of the main seat installed facing forward along the side window of a bus, etc., and is rotated from the upright storage position along the main seat edge toward the center aisle side. A chair equipped with an auxiliary chair that allows the chair to be used is already in general use (for example, the
-3960 Publication).

As shown in Fig. 1, the auxiliary chair includes a seat) A that is rotatably attached to the side edge of the main seat, and a backrest that is rotatably mounted forward on both sides of the rear end of the seat A. It usually consists of a support rod B and a backrest C attached to the support rod B so that it can rotate forward, and the backrest C is first rotated forward and folded from the usage state shown in the first figure. At the top, rotate the support rod B forward and place the folded backrest C on the support rod B.
It is possible to put them on top of the seat A and rotate them laterally to stand up along one side edge of the main seat (not shown) and put them in a stored state.

In such a general auxiliary chair, a lumbar rest D for supporting the lumbar region of a seated passenger is provided on the support rod B, and the lumbar rest D is configured to be almost flush with the backrest C. As a result, the thickness becomes thicker than that in the folded state, and in order to prevent such a problem, the support rod B should be installed as shown in Figure 1 so that the waist rest D does not get in the way when the backrest C is folded.
It has no choice but to be installed in a recessed state further to the rear.

However, according to the body pressure distribution (body pressure contour map) of the backrest, which is considered to be a comfortable seat, the third lumbar vertebrae is high, and by actively supporting this area, a comfortable ride can be achieved without fatigue. It is clear that it is possible to create a seat with good comfort, and it must be said that the seat with the lumbar rest D recessed backwards as described above does not function very well as a lumbar rest, in terms of seating comfort for the passenger. I don't like it at all.

This invention solves the above-mentioned conventional problems and creates an auxiliary chair equipped with a lumbar rest that ensures support for the lumbar region and allows the backrest to be folded to the same thickness as before. The embodiments shown in FIGS. 2-5 will be described below.

In Figures 2 to 5, 1 is the main sheet (not shown)
This is an auxiliary chair seat that is attached so as to be able to rotate laterally at the upper part of a supporter cover 15 that is fixed upright to the tip of a supporter arm 14 that protrudes from one side. is attached to the upper end of the support rod 2 so as to be rotatable forward by a hinge pin 5, and the lower part of the backrest 3 is attached to the upper end of the support rod 2 so as to be rotatable forward by a shaft 6.

A lumbar rest 4 is integrally extended below the backrest 3, and the upper end of the lumbar rest 4 and the backrest 3 are connected to be freely rotatable at a self-hinge portion 7. is configured to be located below the shaft 6 that supports the backrest 3.

The lumbar rest 4 may be constructed separately from the backrest 3, in which case the upper part of the lumbar rest 4 is rotatably connected to the lower part of the backrest 3 by a hinge.

Further, a cross member 9 connecting the left and right support rods 2, 2 is provided at the rear position of the lower part of the waist rest 4 of the support rod 2, and a bracket 10 is fixed to the cross member 9 in a substantially upright state. The swinging piece 11 is connected to the shaft 12 on the bracket 10.
The lower part of the waist rest 4 is rotatably connected to the swing piece 11 by a hinge part 8.

The swinging piece 11 is connected to the spring 1 as shown in FIG.
At 3, rotational force is applied forward (in the direction of arrow a) from the substantially upright state shown by the two-dot chain line.

In the above configuration, when the backrest 3 is in the upright position as shown in FIGS. 2-3, the swinging piece 11 is rotated forward by the spring 13, causing the lower part of the waist rest 4 to protrude forward from the support rod 2, so that when the seat is seated. To reliably support the lumbar region of a passenger.

When the auxiliary chair is not in use, when the backrest 3 is rotated forward about the axis 6, the hinge part 7 located below the axis 6 rotates backward and gradually rises, and the lower part of the lumbar rest 4 As the hinge part 7 rises, the hinge part 8 is lifted upward and moves backward while rotating the swinging piece 11 upward around the shaft 12, and when the backrest 3 is folded, the fourth As shown in the figure, the swinging piece 11 is in a substantially upright state facing upward, and the waist rest 4 is in a state overlapping the backrest 3.

At this time, the spring 13 acts in the direction of pressing the lumbar rest 4 against the back rest 3 and maintains the overlapping state, and then by tilting the support rod 2 forward, the back rest 3 remains overlapped with the lumbar rest 4 and seats. 1, the seat 1 can be rotated laterally to stand up, and the auxiliary chair can be placed in the storage position.

When the backrest is stood up with the axis 6 as the center, the hinge part 8 descends as the hinge part 7 descends, and the swinging piece 11 is rotated forward by the spring 13 to move the lower part of the waist rest 4 forward. It can be made to protrude into the usage state shown in the third figure.

The amount of forward protrusion of the lower part of the waist rest 4 in use is determined by the relationship between the distance d between the shaft 6 and the hinge portion 7 and the arm length l of the swinging piece 11, so by appropriately selecting d and 1. , it can be made into a very comfortable auxiliary chair.

In addition, the spring 13 is conversely connected to the swinging piece 11 in the use position.
The cross member 9 functions as a buffer mechanism together with the cushioning material constituting the waist rest 4, and the cross member 9 functions as a stopper when in use.

Furthermore, since the load point (lower part of the lumbar rest 4) when the lumbar rest 4 is in use is located below the cross member 9 that supports the lower part of the lumbar rest, rearward rotation of the hinge 7 when sitting is prevented. The forward rotation of the backrest 3 can be restricted.

As described above, according to the present invention, when the auxiliary chair is in use, the lumbar rest protrudes forward and reliably fits the lumbar region of the seated passenger, providing extremely comfortable seating, and when the backrest is folded, the lumbar rest protrudes forward. It perfectly overlaps the rear part of the folded backrest and can keep the folded thickness within a certain limit, satisfying both the demands of seating comfort and folding functionality, which has an extremely large practical effect. It is what it is.

[Brief explanation of drawings]

Figure 1A9 shows a side view and perspective view of a conventional auxiliary chair in use, Figures 2 to 5 show an embodiment of the present invention, and Figure 2 is a partially cutaway perspective view. , FIG. 3 and FIG. 4 are side sectional views of main parts showing the used state and the folded state, respectively.
FIG. 5 is a side sectional view showing the operating state of the main parts. 1...Auxiliary chair seat, 2...Support rod, 3...Backrest, 4...Waist rest, 5.
...Hinge pin, 6...Axis, 7, 8...
...Hinge part, 9...Cross member 10
...... Bracket, 11... Rocking piece, 1
2...shaft, 13...spring.

Claims (1)

[Scope of utility model registration request] Support rods are attached to the rear of both sides of the seat so as to be rotatable forward, a backrest is attached to the upper part of the support rod so as to be rotatable forward, and the backrest is rotated downward from the front and folded along the support rod. In an auxiliary chair in which the support rod is rotated together with the folded backrest so that it can be stacked on the seat, a lumbar rest is attached to the lower part of the backrest, and its upper part is moved from the center of rotation of the backrest with respect to the support rod. The lower part of the lumbar rest is hinged and attached, and the lower part of the lumbar rest is connected to a swinging piece pivoted to a cross member connecting the left and right support rods. A vehicle aid, characterized in that it projects forward by forward rotation of a swinging piece, and when the backrest is in a folded state, it overlaps with the back of the folded backrest by rotating the swinging piece upwards. Chair.