JPS6012440Y2 - reclining seat - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a reclining seat.

For example, in reclining seats used in buses, etc., the reclining angle of the backrest can be freely changed using a control lever, but a pillow is integrally provided at the top of the backrest. It is impossible to set the device so that it will always be in the best condition at any tilting position.

That is, as shown in FIG. 1, if the upper column C of the backrest (B) which is tiltably attached to the seat cushion A protrudes forward from the back surface of the backrest,
When the backrest B is folded down, the height of the column C is at its optimum level, but when the backrest B is raised, the pillow hits the back of the head, which is inconvenient as the sitting posture is forced to slouch.

If the pillow C is set so that it is positioned behind the comfortable back of the backrest with the backrest B in an upright position, the pillow C will be too low to function when the backrest is folded down.

The present invention attempts to solve the above-mentioned conventional problems.

The present invention will be explained below with reference to the embodiment shown in Fig. 2. 1 is a seat cushion, 2 is a backrest whose inclination angle can be changed with respect to the seat cushion 1, and the inclination angle of the backrest 2 can be adjusted. For example, this can be done by any arbitrary mechanism such as the free-locking torsion bar mechanism 13 or a gear-to-claw engagement system.

Reference numeral 4 denotes a pillow, and the pillow 4 is attached to the seat cushion 1 by a pillow support arm 5 so as to be tiltable about a rotation axis different from that of the backrest 2.

The rotation shaft 2a of the backrest 2 fixed to the arm 3 of the backrest 2 and the rotation shaft 4a of the pillow 4 are connected via a planetary gear system as shown in FIG. The gear ratio is set so that the rotation angle of the pillow support arm 5 in the same direction as the rotation angle 1 becomes an appropriate value of 1 or less.

That is, a shaft 7 is attached to the tip of an arm 6 fixed to the rotating shaft 2a, and gears 8 and 9 are attached to the shaft 7.

The gear 8 meshes with the fixed gear 10 and rolls on the fixed gear 10 as the shaft 2a rotates.

The gear 9 meshes with a gear 11 fixed to a rotating shaft 4a supported coaxially with the shaft 2a, and rolls on the gear 11 as the shaft 2a rotates. By appropriately selecting a gear ratio of .11, the shaft 2a
The rotation angle of the shaft 4a is in the same direction as the rotation angle of the shaft 2a, and
It can be set to an appropriate angle less than or equal to the rotation angle of a.

Reference numeral 12 denotes a housing that supports and covers the planetary gear device consisting of gears 8, 9, 10, 11, etc.

In the above, when the backrest 2 is upright, as shown by the solid line in the opening of Figure 2, the pillow 4 is located behind the back surface of the backrest 2, and the pillow 4 does not affect the posture of the seated occupant. There isn't.

When the backrest 2 is reclined, the rotation angle of the pillow 4 is smaller than the rotation angle of the backrest 2, so the backrest 2 and the pillow 4
The relative positional relationship of the pillow 4 changes, and the pillow 4 moves relatively forward from the back surface of the backrest 2. When the backrest 2 is in a fully reclined state, the pillow 4 is positioned for the occupant who is lying down as shown by the two-dot chain line. It is held in an optimal position and can fully function as a pillow.

As described above, according to the present invention, it is possible to optimize the positional relationship between the pillow and the backrest according to the inclination angle of the backrest in a flat-clining seat such as a bus, thereby improving passenger comfort. In addition, a planetary gear system is used as a continuous mechanism to change the relative positional relationship between the pillow and the backrest according to the inclination angle of the backrest. This is extremely effective in that everything can be compactly packed into a housing that supports the rotation axis of the pillow on a concentric line, which is not only advantageous in terms of space, but also improves the appearance.

[Brief explanation of the drawing]

Fig. 1 shows a side view of a conventional reclining seat, Fig. 2 (A) is a perspective view and a side view showing an example of a reclining seat according to the present invention, and Fig. 3 shows the relative relationship between a backrest and a pillow according to the present invention. It is a sectional view showing a position displacement control mechanism. 1... Seat cushion, 2... Backrest, 2a... Rotating shaft, 3... Backrest arm, 4... Pillow, 4a...
・Rotation axis, 5... Column support arm, 6...
・Arm, 7...Shaft, 8,9°10.1
1...Gear.

Claims (1)

[Scope of utility model registration request] A reclining seat in which the inclination angle of a backrest with respect to the seat cushion can be changed and adjusted, and the pillow located above the backrest is configured to be able to rotate about a different axis of rotation on the same axis as the axis of rotation of the backrest. In addition, the rotation axis of the backrest and the rotation axis of the pillow are serially connected via a planetary gear device so that the pillow rotates in the same direction but at different rotation angles in accordance with the rotation of the backrest. A reclining seat.