JP2001150989A - Vehicle seat changeable into child seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat changeable into a child seat, eliminating an unusual sense, when an adult is seated, and the complication of a structure. SOLUTION: A backward avoiding portion 7 formed at the lower part of a seatback 3 is rotationally moved to be set back from the front of a seatback body 6 and then a seat cushion 2 is moved upward and backward to be inserted in a space formed therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat convertible into a child seat.

[0002]

2. Description of the Related Art When a small child is stably placed on a vehicle seat without using a child seat, the shoulder of the child is almost as high as an adult due to the seat belt installed on the seat. Must also be
The front and rear length of the seat cushion and the height of the seat back must also be reduced according to the child.

For this reason, conventionally, Japanese Utility Model Laid-Open No. 5-63966 has been proposed.
Or the seat cushion has a middle folding structure in which the seat cushion is bent halfway in the front-rear direction, and the rear side is lifted while the front side of the seat cushion is kept horizontal. A technique has been proposed in which the seat is rotated in such a manner that the center folding point is fixed to a position in which the center folding point contacts the front surface of the seat back. Therefore, the leg with the reduced front and rear dimensions of the seat cushion can be thrown freely, so that the livability is improved. In addition, the lifted seat cushion raises the whole body of the child to a high position, and the position of the shoulder becomes almost the same height as that of an adult, so that the seat belt wearing property is improved.

[0004]

However, in such a conventional technique, since the seat cushion has a bent structure, the seat cushion cannot be lifted in a normal state in which an adult sits without lifting the seat cushion. The breaking point hits the back side of the thigh of the adult occupant, which may give a foreign-body sensation. Further, the reinforcing portion added so as to be able to hold the seat cushion in the moved cantilever state may give an uncomfortable feeling. In addition, when a child is placed on the lifted seat cushion, most of the weight of the child is added to the center folding point or the pivot point of the seat cushion. In addition, the structure of the sheet is complicated, and the solid folding point is further strengthened, thereby further increasing the feeling of foreign matter as described above.

The present invention has been made by paying attention to such a conventional technique, and provides a vehicle seat which can be freely converted into a child seat and has no foreign object feeling when an adult sits down. is there.

[0006]

According to the first aspect of the present invention,
It is composed of a seat cushion that can be raised and moved backward, and a seat back, and at least a lower portion than the seat cushion at the time of rising and moving backward in the seat back,
The rear avoidance portion is separated from the seatback body as a rear avoidance portion, and the rear avoidance portion is supported to be rotatable rearward with respect to the seatback body around its lower fulcrum. The seat is retracted from the front of the seat back.

According to the first aspect of the present invention, the rear end of the seat cushion that has moved up and moved backward enters the space below the seat back formed after the rear avoidance portion has retreated, so that the child has a high height. In addition, an optimal sheet can be obtained both in terms of size and size. In particular, since the seat back body that supports the back of the child is the same as that of an adult, the back of the child can be reliably supported at an appropriate angle.

In addition, since the part of the dividing line between the rear avoidance part and the seat back body that appears at the part in contact with the body is the front face of the seat back, like a middle folding point that appears on a conventional seat cushion, it is difficult for a child to break. It is not pressed by the whole weight, and there is little foreign body sensation. Further, the rear avoiding portion is rotatable about the lower fulcrum. However, as described above, the lower fulcrum provided on the seat back side does not receive as much load as the seat cushion. It is not necessary to make the structure of the lower fulcrum of the seat more rigid than necessary, and the structure of the seat is not complicated.

According to the second aspect of the present invention, the rear avoidance portion is divided by the inclined surface rising from the front surface to the rear surface with respect to the seatback body.

According to the second aspect of the present invention, since the rear avoidance portion is divided by the inclined surface rising from the front surface to the rear surface of the seat back, the inclined surface is used as a footrest for a rear occupant when turning backward. It's easy to do.

According to the third aspect of the present invention, the rear avoiding portion can be fixed while pressing the lower portion of the seat back body from the rear side, and the fixing position is set at a plurality of levels.

According to the third aspect of the present invention, by selecting the fixed position of the rear avoidance portion, the pressure by which the rear avoidance portion pushes the lower portion of the seat back body forward can be adjusted. That is, the lumbar support can be formed by the rear avoidance portion, and the adjustment of the pressing force for supporting the occupant's waist can be appropriately performed by the lower front surface of the seat back body. In particular, the lower surface, which is the dividing surface of the seatback body from the rear avoidance portion, is an inclined surface that rises toward the rear, and the lower portion of the seatback body is in a thin state only on the front side. It is easy to reflect the pressing force of the part on the front.

According to the fourth aspect of the present invention, the lower fulcrum is set at a corner near the rear surface and the lower surface of the seat back.

According to the fourth aspect of the invention, since the lower fulcrum is set at the corner near the rear surface and the lower surface of the seat back, the amount of retreat of the rear avoidance portion is increased.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. The seat 1 according to this embodiment is a second seat installed at the center of a three-row seat of a wagon vehicle. The seat 1 includes a seat cushion 2 and a seat back 3. The seat cushion 2 is supported by a lift device 4 (a link mechanism is also possible) fixed to the floor, can move upward diagonally rearward, and can stop at an arbitrary position.

The seat back 3 has a lower end of a garnish 11 fixed to the side surface supported by a reclining device 5 fixed to the floor.
It can be tilted backward and can be fixed at any tilt.

The seat back 3 itself includes a seat back body 6 and a rear avoidance section 7 located below the body.
And is formed from The rear avoidance portion 7 is divided from the seatback body 6 by an inclined surface 7a that rises from the front surface to the rear surface.

The entire seat back body 6 is fixed to the garnish 11, and the rear avoidance portion 7 is attached to the garnish 11 by a lower fulcrum P set at a corner near the rear surface and the lower surface of the seat back 3. Have been.
A coil spring (not shown) for urging the rear avoiding portion 7 in the backward rotation direction is aligned with the lower fulcrum P of the rear avoiding portion 7, and the rear avoiding portion 7 can be moved at arbitrary plural positions. Locking means (not shown) is provided which can be fixed freely and can release the fixing. Since the side surface of the seat back 3 is covered with the garnish 11, the dividing line on the side surface between the rear avoidance portion 7 and the seat back main body 6 is not visible, and the appearance is excellent.

The headrest 10 includes the seat back body 6.
It is integrated with. In addition, the upper end position of the rear avoidance portion 7,
That is, the rear avoidance portion 7 on the front surface of the seat back 3
The dividing line L (see FIGS. 1 and 2) between the seat cushion 2 and the seat back body 6 is the same as or higher than the raised seat cushion 2. This is to secure the rearward movement of the seat cushion 2.

Next, a method of using the seat 1 according to this embodiment will be described. When used by an adult, the seat cushion 2 may be seated without raising the seat cushion 2 and rotating the rear avoidance portion 7 (see FIG. 2). Since the seat cushion 2 and the seat back 3 have the original front-back length and height,
The occupant's body can be reliably supported. In addition, a dividing line L between the rear avoidance part 7 and the lower part of the seat back body 6 appears on the front surface of the seat back 3, but is a concave position corresponding to the buttocks from the back of the occupant, and
As compared with the case of (1), a load is not so much applied, so that there is no feeling of foreign matter. As described above, since the lower fulcrum P of the rear avoidance portion 7 provided on the seatback 3 side is not applied as much load as the seat cushion 2 as described above, the structure of the lower fulcrum P of the rear avoidance portion 7 is provided. Need not be made more rigid than necessary, and the structure of the seat 1 does not become complicated.

When used by children, first,
The locking means (not shown) is released, and the rear avoiding portion 7 is rotated rearward about the lower fulcrum P by its own urging force. Then, the rear avoidance portion 7 is retracted from the front surface of the seatback body 6, and a space is formed below the seatback body 6. In particular, in this embodiment,
Since the lower fulcrum P is set at a corner near the rear surface and the lower surface of the seat back 3, a large amount of retreat of the rear avoidance portion 7 can be obtained. The rear avoidance unit 7 that has rotated backward is fixed again in a horizontal state.

Next, the seat cushion 2 is raised obliquely rearward by the lift device 4, and the rear end of the seat cushion 2 is inserted into the space formed below the seat back body 6. By doing so, the seat back body 6 is in a state of being overlapped on the upper side of the seat cushion 2, and the front-rear length of the seat cushion 2 becomes shorter by that amount. In addition, since only the seat back body 6 functions as the seat back 3, a child can obtain an optimal seat in terms of height and size. In particular, since the seat back body 6 supporting the back of the child is the same as that of an adult, the back of the child can be reliably supported at an appropriate angle. Further, the inclined surface 7a of the rear avoidance portion 7 rotated rearward can be used as a footrest for a rear passenger.

Further, in this embodiment, by selecting the fixing position of the rear avoidance portion 7, the pressure at which the rear avoidance portion 7 pushes the lower portion of the seat back body 6 forward can be adjusted. For example, as shown in FIG. 4, the rear avoidance portion 7 is pushed forward hard by hand, and the rear avoidance portion 7 is fixed to the lower portion of the seatback body 6 with a predetermined pressing force F applied thereto, thereby providing a lumbar support. Can be formed. Therefore, the pressure for supporting the occupant's waist can be properly adjusted by the lower front surface of the seat back body 6. In particular, since the lower portion of the seat back body 6 is thin only on the front side, the pressing force F by the rear avoidance portion 7 is
It is easy to reflect on the front.

[0024]

According to the present invention, the seat cushion is lifted, and the rear avoiding portion of the seat back pivots rearward to support the child's back only with the seat back body. An optimal sheet can be obtained in terms of size. Nevertheless, when an adult sits down, there is no foreign body sensation and the seat does not have a complicated structure.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a seat according to an embodiment of the present invention.

FIG. 2 is a partially omitted cross-sectional view showing a seat in a normal state.

FIG. 3 is a partially omitted cross-sectional view showing a seat in a state converted into a child seat.

FIG. 4 is a cross-sectional view illustrating a state in which a lower part of a seat back body is being pushed by a rear avoidance portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat 2 Seat cushion 3 Seat back 4 Lifting device 5 Reclining device 6 Seat back body 7 Rear avoidance part 7a Inclined surface 11 Garnish S Rotation fulcrum P Upper fulcrum L Dividing line F Pressing force

Claims (4)

[Claims] 1. A seat cushion, comprising: a seat cushion movable upward and backward; and a seat back, wherein at least a lower portion of the seat cushion at the time of upward and backward movement of the seat back is divided from a seat back body as a rear avoidance portion. And the rear avoidance portion is supported so as to be rotatable rearward with respect to the seatback body about its lower fulcrum, and the rear avoidance portion is retracted from the front surface of the seatback when the rear avoidance portion rotates rearward. A vehicle seat that can be freely converted into a child seat. 2. A vehicle seat convertible to a child seat according to claim 1, wherein the rear avoidance portion is divided by an inclined surface rising from a front surface to a rear surface with respect to the seat back body. A vehicle seat that can be freely converted into a child seat. 3. A vehicle seat convertible into a child seat according to claim 2, wherein the rear avoidance portion is fixable while pressing a lower portion of the seatback body from the rear side, and the fixing position. A vehicle seat that can be freely converted into a child seat, wherein a plurality of levels are set. 4. A vehicle seat convertible into a child seat according to claim 1, wherein the lower fulcrum is set at a corner near the rear surface and the lower surface of the seat back. A vehicle seat that can be freely converted into a child seat.