JPH0714943U - Seat cushion length adjustment device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cushion length adjusting device for a seat, which has a simple drive mechanism, is inexpensive, and has excellent appearance and sitting feeling. [Structure] Rear part 10 of cushion 10 divided into front and rear
The front portion 10a is hinged to the b so as to be vertically swingable, and the upper portion 10c of the front portion 10a is rocked by swinging upward so that the upper surface 10c is aligned with the upper surface 10d of the rear portion 10b, thereby increasing the cushion length L2. The cushion length L1 is shortened by swinging the front portion 10a downward and locking it so that the front portion 10a goes under the rear portion 10b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for adjusting a cushion length by swinging a front portion of a cushion of a seat in a vertical direction.

[0002]

[Prior art]

 As shown in FIG. 4, in a seat, particularly an automobile seat, 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. 5 (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. 6 (A), 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. 6 (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, since the front portions 2a and 2c of the cushions 2A and 2B need to be moved straight forward and backward, there is a problem that the drive mechanism is complicated and the cost is high. Particularly, in the latter cushion 2B, When the front portion 2c is moved rearward, the outer skin 2g between the front portion 2c and the rear portion 2d is loosened, which causes a problem of poor appearance and sitting feeling.

Therefore, an object of the present invention is to provide a cushion length adjusting device for a seat, which has a simple drive mechanism, is inexpensive, and has a good appearance and a comfortable seating feeling.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is a device for adjusting a cushion length by swinging a front portion of a cushion in a vertical direction, wherein the cushion is divided into a front portion and a rear portion. The front part is hinged to the rear part to swing up and down between an upper swing position where the upper surface of the front part is aligned with the upper face of the rear part and a lower swing position where the front part wraps around the lower part of the rear part. It is characterized by the provision of a lock member that locks in the vertical swing position.

[0008]

[Action]

 According to the present invention, the front portion is hinged to the rear portion of the cushion which is divided into two parts in the front and rear direction so that the front portion can swing up and down, and the upper portion of the front portion is rocked by swinging upward so that the upper surface of the rear portion is aligned with the upper surface of the rear portion. The length of the cushion becomes longer, and the cushion length becomes shorter when the front part is swung downward so as to wrap around the rear part and locked.

Since the front part of the cushion is simply hinged to the rear part and pivoted in the vertical direction, the drive mechanism is simple and the cost is low, and the cushion length can be adjusted easily and quickly. At the same time, the front portion of the cushion can be locked by the lock member in the up and down swinging position, which improves safety. In addition, since the slack of the epidermis as in the latter prior art does not occur, the appearance is excellent and the sitting feeling is good.

[0010]

【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 is divided into a front portion 10a and a rear portion 10b, and the front portion 10a has a cushion length in a range of L1 and L2 (L1 <L2). Since it is for adjustment, the length is shorter than that of the rear portion 10b.

A cushion frame 11 is provided in a rear portion 10b of the cushion 10, and a pair of hinge brackets 12 and 12 which are raised forward at a predetermined interval in the left-right direction are fixed to a front surface of the cushion frame 11. Has been done.

A frame 13 is provided in the front portion 10a of the cushion 10, and a pair of hinge brackets 14, which rise rearward at a predetermined interval in the left-right direction, are provided on the rear surface of the frame 13. 14 is fixed.

The hinge brackets 14, 14 are fitted inside the hinge brackets 12, 12, and the hinge brackets 12, 12, 14, 14 each have a hinge hole 12a, 12a penetrating therethrough in the left-right direction. , 14a, 14a are formed respectively, and by inserting the hinge shaft 15 into the hinge holes 12a, 14a, the front portion 10a is vertically swingably hinged to the rear portion 10b of the cushion 10 described above. Become.

The front portion 10a and the rear portion 10b of the cushion 10 have an upper swing position U (see the solid line in FIG. 1) in which the upper surface 10c of the front portion 10a is aligned with the upper surface 10d of the rear portion 10b, and the front portion 10a is the rear portion. It is adapted to be vertically swung to a lower swinging position (see the chain double-dashed line in FIG. 1) D that goes around 10b.

On the other hand, a lock lever 17 is attached to a hinge bracket 14 on one side (right side in FIG. 3) of the front portion 10 a of the cushion 10 by a pin 18 so as to be rotatable up and down, and a front end portion of the lock lever 17 is attached. Penetrates through the long hole 14b of the hinge bracket 14 and the long hole 13a of the frame 13 and projects to the front of the front portion 10a, and an operation knob 19 is provided at the front end thereof.

Further, at the rear end of the lock lever 17, when the front portion 10a of the cushion 10 is in the upper swing position U, the hinge bracket 12 on one side of the rear portion 10b (right side in FIG. 3) is provided. A lock pin 20 is provided which engages with the upper lock recess 12b and engages with the lower lock recess 12c of the hinge bracket 12 when the front portion 10a is in the lower swing position D. The lock lever 17 is biased in the engaging direction (around the hour hand) by a coil spring 21.

With the above configuration, when the length L2 of the cushion 10 is long, the front portion 10a swings upward, and the lock pin 20 of the lock lever 17 moves the upper lock recess 12b of the hinge bracket 12 of the rear portion 10b. And the front portion 10a is locked in the upper swing position U.

When the knob 19 of the lock lever 17 is pushed down from the above state, the lock pin 20 is disengaged from the upper lock recess 12b of the hinge bracket 12, so that the front portion 10a of the cushion 10 moves the hinge shaft 15 by its own weight. Swing down to the center. After that, when the hand is released from the knob 19 of the lock lever 17, the lock pin 20 is engaged with the lower lock concave portion 12c of the hinge bracket 12 by the urging force of the coil spring 21, and the front portion 10a is moved to the lower swing position D. The length L2 of the cushion 10 is shortened to L1.

On the other hand, when the knob 19 of the lock lever 17 is pushed backward from the above state, the lock pin 20 comes off from the lower lock recess 12c of the hinge bracket 12, so that the front portion 10a of the cushion 10 is lifted by hand. When it is rocked and then released from the knob 19 of the lock lever 17, the lock pin 20 is engaged with the upper lock recess 12b of the hinge bracket 12 by the urging force of the coil spring 21, and the front portion 10a is moved to the upper lock position. Since the cushion 10 is locked by U, the length L1 of the cushion 10 is increased to L2.

Therefore, in the cushion 10, since the front portion 10a is only swung up and down by the hinge brackets 12 and 14 and the hinge shaft 15, the driving mechanism is simple and the manufacturing cost is low, and the cushion length is adjusted. Can be done easily and quickly. Further, the front portion 10a can be locked by the lock lever 17 at the upper and lower swinging positions U and D, which is safe. Furthermore, since the outer skin of the cushion 10 does not sag, the appearance and the feeling of sitting are improved.

In the above embodiment, the lock lever 17 is used as the lock member for the front portion 10a of the cushion 10, but as shown in FIG. 2A, the lock lever 17 is attached to the front portion 10a and the rear portion 10b, respectively. The front portion 10a may be locked at the upper and lower swing positions U and D by magnets or magic fasteners 23a and 23b. Further, as shown in FIG. 2B, the front portion 10a may be locked at the upper and lower swinging positions U and D by clips 24a and 24b attached to the front portion 10a and the rear portion 10b, respectively.

[0022]

[Effect of device]

 As is apparent from the above description, the seat cushion length adjusting device of the present invention has a front portion swingably hinged to the rear portion of the front and rear divided cushions so that the upper surface of the front portion is the rear portion. The cushion length is made longer by rocking by rocking upward so that it is aligned with the top surface, and the cushion length is shortened by rocking downward so that the front part wraps around below the rear part. It is something that is done.

Therefore, since the front portion of the cushion is simply hinged to the rear portion and pivoted in the vertical direction, the drive mechanism is simple and the cost is low, and the cushion length can be adjusted easily and quickly. be able to. Also, since the front part of the cushion can be locked by the rocking member in the up and down swinging position, safety is improved, and the slack of the skin unlike the latter prior art does not occur, resulting in excellent appearance and seating. Feeling is also good.

[Brief description of drawings]

FIG. 1 is a side view of a cushion length adjusting device of the present invention.

2A and 2B are side views of modified examples of the lock member.

FIG. 3 is an exploded perspective view of a cushion length adjusting device.

FIG. 4 is a perspective view of a vehicle seat.

5A and 5B are cross-sectional views of a length adjusting cushion of a first conventional technique.

6A and 6B are cross-sectional views of a second conventional length adjusting cushion.

[Explanation of symbols]

10 ... Cushion, 10a ... Front part, 10b ... Rear part, 10
c, 10d ... top surface, 12, 14 ... hinge bracket, 1
2b ... upper lock recess, 12c ... lower lock recess, 15 ... hinge shaft, 17 ... lock lever, 20 ... lock pin, 21 ... coil spring, L1, L2 ... length, U ...
Upper swing position, D ... Lower swing position.

Claims (1)

[Scope of utility model registration request] 1. A device for adjusting a cushion length by swinging a front portion of a cushion in a vertical direction, wherein the cushion is divided into a front portion and a rear portion, and a front portion is hinged to a rear portion. The upper part of the front part is vertically rocked to the upper rocking position where the upper surface of the front part is aligned with the upper surface of the rear part, and the lower rocking position where the front part wraps around the lower part of the rear part. A cushion length adjusting device for a seat, characterized in that a lock member is provided.