JPH0729882Y2 - Cushion length variable seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cushion length variable seat.

(Prior Art) As one type of seat, there is a seat including a seat cushion that forms a seating portion and a seat back that is located at a rear portion of the seat cushion and forms a backrest portion. The seating comfort in such a seat is determined by the relative surface curves of the seating portion, which is the upper surface of the seat cushion, and the backrest portion, which is the front surface of the seat back, and these surface curves are set at the time of seat design and are maintained permanently. It has to be done. Further, the comfort of sitting on the seat varies depending on the physique of the seated person, and in this case, the length of the seat cushion in the front-rear direction has a great influence, so the cushion length must be changed. In order to deal with such a problem, there is a cushion length variable seat whose cushion length can be changed.

A conventional variable cushion length seat is configured such that the seat back is movable in the front-rear direction with respect to the seat cushion, and the cushion length is adjusted by appropriately moving the seat back.

(Problems to be solved by the invention) By the way, in such a cushion-length variable seat, the surface curve formed by the front surface of the seat back and the upper surface of the seat cushion changes due to the position adjustment of the seat back, and is set in advance. There is a risk that the curved surface will collapse and the comfort of sitting will be impaired. Therefore, an object of the present invention is to address such a problem.

(Means for Solving the Problems) In the present invention, in a cushion length variable seat of the above-mentioned type, a top portion of an auxiliary cushion having a substantially triangular cross section is vertically moved to a portion of the front end surface of the seat cushion which is located below the upper surface by a predetermined amount. When the auxiliary cushion is assembled so as to be rotatable in a direction, and the auxiliary cushion is rotated upward and one side thereof is brought into contact with the front end surface of the seat cushion, the upper surface of the auxiliary cushion and the upper surface of the seat cushion are substantially flush with each other. It is characterized in that fixing means for fixing the auxiliary cushion and the seat cushion in a detachable manner is provided at a position where the auxiliary cushion and the seat cushion are opposed to each other.

(Operation and Effect of the Invention) In the seat having such a structure, the cushion length is changed by rotating the auxiliary cushion in the vertical direction so as to be attached to and detached from the front end surface of the seat cushion to cope with the physical constitution of the seated person. In addition, since the positional relationship of the seat back with respect to the seat cushion is not changed, the preset surface curve relationship formed by the seat cushion and the seat back is maintained. Therefore, the seat is more comfortable to sit on than the conventional seat of this type.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 show an essential part of a cushion length variable seat according to the present invention. The seat is a front seat for a driver of an automobile, and mainly includes a seat cushion 11, a seat back 12 and an auxiliary cushion 13 as shown in FIGS. 3 and 4.

The seat cushion 11 and the seat back 12 are similar to the conventional seat cushion and seat back, and the seat cushion 11 forms a seating portion and the seat back 12
Is located at the rear of the seat cushion 11 and forms a backrest. Seat cushion 11 is cushion pad 11
The cushion frame 11b covers a and is covered with a cushion cover 11c, and the seat back 12 is formed similarly to the seat cushion 11.

Thus, the auxiliary cushion 13 has a right-angled triangular cross-sectional shape and extends over the entire seating portion of the seat cushion 11. The auxiliary cushion 13 is formed by covering the auxiliary pad 13a with a cover 13b. As the auxiliary pad 13a, a slightly harder pad is used as compared with the cushion pad 11a. As a result, the auxiliary cushion 13 has substantially the same cushioning properties as the seat cushion 11. The auxiliary cushion 13 is sewn at a predetermined portion of the front end surface 11d of the seat cushion 11 at the top 13c, is rotatably assembled in the vertical direction, and is rotated upward and one side 13d thereof is formed. When the seat cushion 11 is brought into contact with the front end face 11d of the seat cushion 11, the upper surface 13e is located substantially on the same plane as the upper surface 11e of the seat cushion 11. Further, a fixing member 11 made of a magnet is provided at the front end of the upper surface 11e of the seat cushion 11 and at the rear end of the upper surface 13e of the auxiliary cushion 13 which faces the front end.
The auxiliary cushions 13 can be attached to and detached from the seat cushion 11 as shown in FIGS. 1 and 2 by fixing the fixing members 11f and 13f to each other. The fixtures 11f and 13f constitute the fixing means of the present invention, and a pressure sensitive adhesive tape or the like can be suitably used instead of the above magnet.

In the seat having such a structure, when the auxiliary cushion 13 is separated from the front end surface 11d of the seat cushion 11 as shown in FIG. 1, the cushion length of the seat cushion 11 in the front-rear direction is short and When the auxiliary cushion 13 is fixed to the front end surface 11d of the seat cushion 11 as shown in, the cushion length is the upper surface of the auxiliary cushion 13.
It is as long as 13e. For this reason, if the auxiliary cushion 13 is attached to and detached from the seat cushion 11 according to the physique of the driver, the cushion length of the seat cushion 11 changes correspondingly and can be adapted to the physique of the driver. In this case, since the positional relationship between the seat back 12 and the seat cushion 11 does not change at all, the surface curve formed by the seat cushion 11 and the seat back 12 is maintained at a preset surface curve. Therefore, according to such a seat, the sitting comfort is further improved as compared with the conventional seat, and the fatigue of the occupant is prevented. Further, since the state shown in FIG. 4 is obtained when the auxiliary cushion 13 is detached from the seat cushion 11, the auxiliary cushion 13 has no adverse effect on the occupant.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a seat according to an embodiment of the present invention with an auxiliary cushion removed, and FIG. 2 is a sectional view of an essential part of the seat with the auxiliary cushion fixed, and FIG. FIG. 4 is a perspective view of the seat, and FIG. 4 is a side view of the seat when seated on the seat. Explanation of code 11 …… Seat cushion, 11d …… Front end surface, 11e …… Top surface, 12 …… Seat back, 13 …… Auxiliary cushion, 13c
…… One top, 13d …… One side, 13e …… Top surface.

Claims (1)

[Scope of utility model registration request] 1. A seat having a seat cushion forming a seating portion and a seat back located at a rear portion of the seat cushion and forming a backrest portion, the portion being a predetermined amount lower than an upper surface of a front end face of the seat cushion. ,
When the top portion of the auxiliary cushion having a substantially triangular cross section is assembled so as to be rotatable in the vertical direction and the auxiliary cushion is rotated upward and one side thereof is brought into contact with the front end surface of the seat cushion, the upper surface of the auxiliary cushion And an upper surface of the seat cushion are located substantially on the same plane, and a fixing means for detachably fixing the auxiliary cushion and the seat cushion at a portion where the auxiliary cushion and the seat cushion face each other. Cushion length variable seat characterized by being provided.