JPH0713245U - 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. A front portion of the cushion 10 is extended forward, and an extension portion 10c integrated with the front portion is pushed forward by a roller 14 by a forward operation of an operating member 16 to lengthen a cushion length L2, By the backward movement operation of the operating member 16, the roller 14 is retracted, and the extension portion 10c of the cushion 10 is pulled backward by the urging force of the spring 19 to shorten the cushion length L1, while the operating member 16 is moved to a predetermined operating position. The lock member 17 is used to lock.

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]

 In a seat, particularly an automobile seat, as shown in FIG. 6, the length L of the cushion 2 of the seat 1 is adjusted according to the physique and 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. 7 (A), a cushion 2A is divided into a front portion 2a and a rear portion 2b, and as shown in FIG. 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 portion 2a forward.

Further, as shown in FIG. 8A, 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 FIG. 8 (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 pad front portion 2c is moved backward, a slack a occurs in the skin 2g between the pad front portion 2c and the pad rear portion 2d, so that there is a problem that the appearance and the sitting feeling 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. The extension part so that the extension part can be wound under the cushion, and the end part of the extension part of the cushion is locked in the cushion to urge the extension part in the winding direction. , The roller that comes into contact with the inner surface of the extension portion and the roller is moved in the front-back direction to push the extension portion forward against the biasing force of the spring, or to pull it backwards following the biasing force of the spring. The present invention is characterized in that an operating member for operating and a lock member for locking the operating member at a predetermined operating position are provided.

[0008]

[Action]

 According to the present invention, the forward movement of the operating member pushes the front extended portion of the cushion forward with the roller to increase the cushion length, and the backward movement of the operating member causes the roller to retreat. The extension of the front part of the cushion is pulled backward by the urging force of the spring, shortening the cushion length. Since the above-mentioned cushion only pushes or pulls in the extension part integrated with the front part of the cushion, there is no gap as in the prior art of the former, and the slack of the epidermis as in the prior art of the latter does not occur. Since it does not occur, the appearance is excellent and the sitting feeling is also good.

Further, since the operating member is simply moved forward or backward, the cushion length can be adjusted easily and quickly, and the operating member can be locked by the locking member at a predetermined operating position. As a result, the roller does not move carelessly back and forth, improving safety.

[0010]

Embodiments The present invention will be described in detail below 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. The end portion 10d of the outer skin 10b of the extension portion 10c of the cushion 10 is locked via a cushion frame 12c spring 19 provided at the bottom portion of the cushion 10, and the spring 19 causes the extension portion 10c in the winding direction. Energize.

Above the front part of the cushion frame 12 in the cushion 10, a roller 14 that contacts a caterpillar-like cushioning member 13 attached to the inner surface of the pad 10a of the extension 10c of the cushion 10 is arranged. To do. The cushioning material 13 is for preventing the roller 14 from directly contacting the pad 10a so that the roller 14 can rotate smoothly, and also for preventing abnormal noise due to contact.

On the other hand, as shown in FIG. 3, by bending the shaft material, the left and right side portions 16a, 16a are provided with operation poles 16 having a substantially U shape when viewed from the side, and both side portions 16a of the operation pole 16 are provided. , 16a are integrally connected to each other by a support shaft portion 16b in the left-right direction, and lower ends thereof are integrally connected in an operation portion 16c in the left-right direction. The operation pole 16 has vertical support columns 16d, 16d of both side portions 16a, 16a fitted in front and rear long guide slots 12a, 12a provided in the front portion of the cushion frame 12 so as to be movable back and forth. To be done.

The roller 14 is rotatably supported by the support shaft portion 16b of the operation pole 16, and when the operation pole 16 is operated to move forward, the roller 14 moves forward (see FIG. 1), and when it is operated to move backward. The roller 14 retracts (see FIG. 2).

As shown in FIGS. 4 and 5, the pillar portions 16d and 16d of the operation pole 16 have a fixed front and rear direction on both sides of the elongated guide holes 12a and 12a of the cushion frame 12, respectively. , 12b, which are engageable from above, are respectively fixed to the lock holes 12b, ..., 12b formed at intervals.

Further, each of the support columns 16 d, 16 d is located below the cushion frame 12 and sandwiches the cushion frame 12 with the lock plate 17 to regulate the vertical movement of the operation pole 16. The guide plates 18, 18 are fixed respectively. As shown in FIG. 4, the guide plates 18, 18 are inclined downward so that the rear end portion 18a contacts the lower surface of the cushion frame 12 when the lock plate 17 is engaged with the lock hole 12b. When the lock plate 17 is pulled out from the lock hole 12b by inclining the support columns 16d, 16d backward with the rear end 18a as a fulcrum (unlock), as shown in FIG. The operation pole 16 is contacted face-to-face with the lower surface of the guide 12, and the operation pole 16 is guided so as to be smoothly moved back and forth along the elongated guide hole 12b.

With the above configuration, in the state where the length L1 of the cushion 10 is short as shown in FIG. 2, the operation pole 16 moves rearward, the lock plate 17 engages with the lock hole 12b, and the roller 14 moves. Also, the extension portion 10c of the cushion 10 is pulled backward by the urging force of the spring 19.

When the operation portion 16c of the operation pole 16 is lifted up from the above state, the support portion 16d is tilted rearward with the rear end portion 18a of the guide plate 18 as a fulcrum, and the lock plate 17 is removed from the lock hole 12b. It is pulled out and unlocked. If the operating portion 16c is operated forward in that state, the roller 14 moves forward together with the operating pole 16, and the extension portion 10c of the cushion 10 is pushed forward by the roller 14 against the biasing force of the spring 19. As shown in FIG. 1, the length L1 of the cushion 10 is increased to L2 (L1 <L2).

When the operation portion 16c of the operation pole 16 is pushed down at a position where the cushion 10 has an appropriate length, the column portion 16d returns to the front, and the lock plate 17 moves into the lock hole 12b at that position. The operation pole 16 is locked by being engaged.

On the other hand, from the state shown in FIG. 1, the operation portion 16c of the operation pole 16 is lifted up and the lock plate 17 is extracted from the lock hole 12b and unlocked in the same manner as described above, and then the operation portion 16c is opened. When the backward operation is performed, the roller 14 moves backward together with the operation pole 16, and the extension portion 10c of the cushion 10 is pulled rearward by the urging force of the spring 19, so that the length L2 of the cushion 10 is reduced as shown in FIG. Shortens to L1. Then, when the operation portion 16c of the operation pole 16 is pushed down at a position where the cushion 10 has an appropriate length, the operation pole 16 is locked at the position in the same manner as above.

Therefore, since the cushion 10 only pushes the extension portion 10c integrated with the front portion of the cushion 10 forward and retracts it backward, a gap is not formed in the cushion 10 and the outer skin 10b is not loosened. Therefore, the appearance and the feeling of sitting are improved.

[0021]

[Effect of device]

 As is clear from the above description, in the seat cushion length adjusting device of the present invention, the front extension of the cushion is pushed forward by the roller by the forward operation of the operating member to increase the cushion length. , The backward movement of the operating member causes the roller to retract, and the extension of the front part of the cushion is pulled backward by the urging force of the spring to shorten the cushion length. The above-mentioned conventional technique does not cause slackening of the epidermis, so that the appearance is excellent and the sitting feeling is also good.

Further, since the operating member is simply moved forward or backward, the cushion length can be adjusted easily and quickly, and the operating member can be locked by the locking member at a predetermined operating position. As a result, the roller does not move carelessly back and forth, which improves safety.

[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 is a perspective view of a drive mechanism

FIG. 4 is a side view of the lock plate and the guide plate when locked.

5A is a side view of a lock plate and a guide plate when unlocked, and FIG. 5B is a front view of FIG.

FIG. 6 is a perspective view of a vehicle seat.

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

8A and 8B are cross-sectional views of a second conventional length adjusting cushion.

[Explanation of symbols]

10 ... Cushion, 10a ... Pad, 10b ... Epidermis, 1
0c ... extension part, 10d ... end part, 12 ... cushion frame, 12b ... lock hole, 14 ... roller, 16 ... operation pole, 17 ... lock plate, 18 ... guide plate, 19 ... spring.

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. A spring that locks the end portion of the extension portion of the cushion in the cushion while allowing it to be wound downward, and biases the extension portion in the winding direction, and a roller that contacts the inner surface of the extension portion. An operating member for moving the roller in the front-rear direction to push the extension portion forward against the biasing force of the spring, or to pull the extension portion rearward following the biasing force of the spring,
A cushion length adjusting device for a seat, comprising: a lock member for locking the operation member at a predetermined operation position.