JPH0714944U - Seat cushion length adjustment device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a cushion length adjusting device for a seat, which improves the appearance and the feeling of sitting. [Structure] A front portion of a cushion 10 is extended forward, a front portion of a cushion frame 11 in the cushion 10 is divided into a plurality of portions in a length direction, and each of the divided frames 11A to 11C.
The extension portion 10c is fixed to the operation member 13, 15, 1
When the divided frames 11A to 11C are pushed forward by the members 6 and 17 and are straightened, the extended portions 10c are accompanied by this.
Is also pushed forward to increase the cushion length L2, and when the operating members 13, 15, 16, 17 bend the divided frames 11A to 11C downward, the extension portion 10c is also drawn downward and the cushion is extended. Length L1
Becomes shorter.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for adjusting a cushion length by moving a front portion of a cushion of a seat in a front-back direction.

[0002]

[Prior art]

 As shown in FIG. 9, in a seat, particularly an automobile seat, the length L of the cushion 2 of the seat 1 is adjusted according to the physique or preference of the seated person to improve the seated posture and stability of the seated person. Is preferred.

Conventionally, as a device as described above, as shown in FIG. 10 (A), a cushion 2 A is divided into two parts, a front part 2 a and a rear part 2 b, and as shown in FIG. 10 (B), There is one in which the length of the cushion 2A can be adjusted within the range of L1 and L2 (L1 <L2) by moving the front portion 2a forward.

Further, as shown in FIG. 11A, the pad of the cushion 2B is divided into a front portion 2c and a rear portion 2d, and the front and rear pads 2e and 2f are covered with a single skin 2g. As shown in 11 (B), by moving the front portion 2c forward, there is one in which the length of the cushion 2B can be adjusted within the range of L1 and L2 (L1 <L2).

[0005]

[Problems to be solved by the device]

 However, in the former cushion 2A, when the front portion 2a is moved forward, a large gap T is formed between the front portion 2a and the rear portion 2b, so that the appearance and the sitting feeling are poor, and dust or small articles are not included in the gap. There was a problem of falling to T. Further, in the latter cushion 2B, when the front portion 2c is moved rearward, the outer skin 2g between the rear portion 2d and the rear portion 2d is loosened, so that there is a problem that the appearance and the feeling of sitting are poor.

Therefore, an object of the present invention is to provide a cushion length adjusting device for a seat that improves the appearance and the feeling of sitting.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is a device for adjusting the cushion length by moving the front part of the cushion in the front-back direction, wherein the pad and the epidermis on the front part of the cushion are extended forward. So that the extension part can be wound under the cushion, while the front part of the cushion frame in the cushion is divided into a plurality of parts in the length direction, and each divided frame is bent below the cushion. The pad is integrally foamed and fixed to each of the divided frames so as to be operably connected to each other, and an operation member for pushing the divided frame straight forward or bending it downward is provided. Is to be.

[0008]

[Action]

 According to the present invention, when the operating member pushes the split frame forward and straightens it, the extension portion is also pushed forward and the cushion length increases, while the operating member pushes the split frame downward. When it is bent to, the extension portion is also drawn downward and the cushion length is shortened. Since the cushion only pushes or pulls in the extension part integrated with the front part of the cushion, there is no gap unlike the prior art of the former, and the slackness of the epidermis like that of the latter of the prior art. Since it does not occur, the appearance is excellent and the sitting feeling is also good. In addition, since the split frame is simply pushed out or bent by the operating member, the cushion length can be adjusted easily and quickly.

[0009]

【Example】

 Hereinafter, the present invention will be described in detail with reference to illustrated embodiments. As shown in FIGS. 1 and 2, the cushion 10 of the seat has a front pad 10a and an outer skin 10b integrally extended forward with a predetermined length l, and the extension portion 10c extends downward from the cushion 10. To be able to get involved.

A cushion frame 11 is provided in the cushion 10, and a front portion of the cushion frame 11 is divided into a plurality of pieces (three pieces in the figure) at substantially equal intervals in the length direction.

As shown in FIGS. 3 and 4, each of the divided frames 11A, 11B and 11C is formed in an inverted trapezoidal shape when viewed from the side surface. Then, on both side surfaces of the adjacent divided frames 11A to 11C (only the left side is shown in FIGS. 3 and 4, the same applies hereinafter), hinge plates 12 and 12 for connecting the bottom sides to each other so as to be rotatable back and forth are attached, respectively. Hinge plates 12 are attached to both side surfaces of the rear frame 11D and the split frame 11C of the cushion 11 so as to connect the bottom sides to each other so as to be rotatable back and forth.

Therefore, the divided frames 11A to 11C are pushed forward by the hinge plates 12 to be straightened (see FIGS. 1 and 3) and bent downward (see FIG. 1 and FIG. 3). 2 and 4) (see FIG. 2 and FIG. 4).

Wire springs 13, ..., 13 for urging the divided frames 11A to 11C to a bending position are attached to both side surfaces of the adjacent divided frames 11A to 11C and the rear frame 11D, respectively.

The pad 10a on the front portion of the cushion 10 is integrally foamed and fixed to the upper surface of each of the divided frames 11A to 11C, whereby the pad 10a is rotated forward and backward as the divided frames 11A to 11C rotate. And the skin 10b also rotates back and forth. The rear pad 10d may be placed on the upper surface of the frame 11D, but may be integrally foamed and fixed on the upper surface of the frame 11D.

On the other hand, as shown in FIGS. 5 and 6, on both sides of the lower surface of the rear frame 11D, a support frame 15 is slid in the front-rear direction by the frame guides 14 along the lower surface of the divided frames 11A to 11C. The support frame 15 is supported freely and is slid back and forth by an actuator such as a cylinder.

With the above configuration, as shown in FIGS. 1 and 5, when the length L2 of the cushion 10 is long, the support frame 15 is slid forward to contact the lower surface of each of the divided frames 11A to 11C. In contact with each other, the divided frames 11A to 11C are pushed out and held by the support frame 15 in a position where they are straightened against the biasing force of the wire spring 13.

When the support frame 15 is slid backward by a cylinder or the like from the above state, as shown in FIGS. 2 and 6, each of the divided frames 11A to 11C loses the support frame 15 which is held straight. It is automatically folded downward by the biasing force of 13. Along with this, since the extension portion 10c of the cushion 10 is also pulled backward, the length L2 of the cushion 10 is shortened to L1.

On the other hand, when the support frame 15 is slid forward from the state shown in FIG. 6 with a cylinder or the like, the support frames 15 make each of the divided frames 11A to 11C straight against the urging force of the wire spring 13. Pushed into position. Along with this, since the extension portion 10c of the cushion 10 is also pushed forward, the length L1 of the cushion 10 increases to L2.

Therefore, since the cushion 10 only has to push the extension portion 10c integrated with the front portion of the cushion 10 forward together with the divided frames 11A to 11C and pull it backward, a gap is generated in the cushion 10, Since the slack does not occur on the skin 10b, the appearance and the feeling of sitting are improved. Further, since the support frames 15 and the wire springs 13 only push out or bend the divided frames 11A to 11C, the cushion length can be adjusted easily and quickly.

7 and 8 show another embodiment of the operating member, the wire spring 16 biases each of the divided frames 11A to 11C to a position where they are straightened, contrary to the above embodiment. Guide portions 11b to 11d of the flexible wire 17 are formed on side surfaces of the divided frames 11B and 11C and the rear frame 11D, and a front end portion 17a of the flexible wire 17 is fixed to a side surface of the divided frame 11A. .

Therefore, when the flexible wire 17 is loosened in the direction of the arrow a, as shown in FIG. 7, the divided frames 11A to 11C are pushed out by the biasing force of the wire spring 16 to a position where they are straightened. Since the extension portion 10c of the cushion 10 is also pushed forward, the length L1 of the cushion 10 is increased to L2.

When the rear end of the flexible wire 17 is pulled to the rear of the arrow b by a manual lever or the like, each of the divided frames 11A to 11C is bent downward against the urging force of the wire spring 16 and accordingly. Since the extension 10c of the cushion 10 is also pulled backward, the length L2 of the cushion 10 is shortened to L1.

[0023]

[Effect of device]

 As is clear from the above description, when the cushion length adjusting device for a seat of the present invention is pushed forward by the operating member to straighten the split frame, the extension portion of the cushion is pushed forward accordingly. While the cushion length is increased, the operating member causes the divided frame to be bent downward, and along with this, the extension of the cushion is also pulled downward and the cushion length is shortened.

Therefore, since the cushion only pushes out or extends in the extension part integrated with the front part of the cushion, there is no gap as in the above-mentioned former prior art, and the above-mentioned latter prior art does not. Since such slack of the epidermis does not occur, the appearance is excellent and the sitting feeling is also good. Moreover, since the split frame is simply pushed out or bent by the operating member, the cushion length can be adjusted easily and quickly.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a cushion adjusted to be long.

[Fig. 2] Cross-sectional view of a cushion adjusted to be short

[Fig. 3] Side view of the segmented frame extruded straight

FIG. 4 is a side view of the split frame bent downward.

FIG. 5 is a perspective view of the split frame extruded straight by the operation member of the first embodiment.

6 is a perspective view of a divided frame bent downward by the operation member of FIG.

FIG. 7 is a perspective view of a divided frame that is extruded straight with the operation member according to the second embodiment.

8 is a perspective view of a split frame bent downward by the operation member of FIG.

FIG. 9 is a perspective view of a vehicle seat.

10 (A) and (B) are cross-sectional views of a first conventional length adjusting cushion.

11A and 11B are cross-sectional views of a second conventional length adjusting cushion.

[Explanation of symbols]

10 ... Cushion, 10a ... Front pad, 10b ... Epidermis, 10c ... Extension part, 10d ... Rear pad, 11 ... Cushion frame, 11A-11C ... Dividing frame, 1
1D ... Rear frame, 12 ... Hinge plate, 13, 16 ... Wire spring, 15 ... Support frame, 17 ... Flexible wire.

Claims (1)

[Scope of utility model registration request] 1. A device for adjusting a cushion length by moving a front portion of a cushion in a front-back direction, wherein a pad and an epidermis on a front portion of the cushion are extended forward, and the extension portion of the cushion is extended. The front part of the cushion frame in the cushion is divided into a plurality of parts in the lengthwise direction while allowing it to be wound downward, and each divided frame is foldably connected to the lower part of the cushion and A cushion length adjusting device for a seat, characterized in that the pad is integrally foamed and fixed, and an operation member for pushing the divided frames straight forward or bending them downward is provided.