JPH059226Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a vehicle seat.

[Prior art]

As a type of vehicle seat, a seat cushion is provided with side portions that project upward on both sides, and a seat back that is assembled to be able to tilt forward and backward with respect to the seat cushion and stands upright extends forward on both sides of the seat cushion. This type of vehicle seat has a seat cushion and a seat back, each side portion of which accurately holds a seated person, and has an extremely excellent holding function.

[Problem that the invention attempts to solve]

Incidentally, in such a seat, in order to further improve the ability to hold a seated person, the amount of overhang of the side portions of the seat cushion and seat back may be increased. In this case, the seat is a front seat installed in a two-door vehicle, and when the rear seat occupant tilts the seat back 1 forward as shown in FIG. There is a problem in that the side 1a of the seat bag 1 abuts each side portion 2a of the seat cushion 2, making it impossible to tilt the seat bag 1 by a predetermined amount.

In order to deal with this problem, in the conventional seat, as shown in FIG. The contact between the portions 1a and 2b is eliminated to allow the seat bag 1 to tilt by a predetermined amount. However, in this case, since each side portion 2b of the seat cushion 2 only extends from the front end of the cushion 2 to approximately the center thereof, the ability to hold both sides of the lumbar region of the seated person is insufficient.

Therefore, an object of the present invention is to configure each side portion of the seat cushion to be movable up and down, so that when each side portion of the seat bag comes into contact with each side portion of the seat cushion during the tilting of the seat bag, the side portions of the seat cushion part to allow the seat bag to tilt by a predetermined amount,
Thereby, each side portion of the seat cushion has a sufficient length to ensure sufficient retention on both sides of the lumbar region of the seated person.

[Means for solving problems]

In the vehicle seat of the above-mentioned type according to the present invention, the front end side of the side rod constituting the side portion of the seat cushion is attached to the cushion frame constituting the seat cushion so as to be rotatable in the vertical direction. a first link whose end side is rotatably attached to the cushion frame and whose upper end is rotatably attached to the rear end side of the cushion frame;
The link is movably supported via a second link rotatably connected to the lower end of the link, and is urged upwardly by a first spring, and both links are urged in one direction by a second spring. interlocking means is provided for holding the seat upright by restricting rotation in the same direction, and for rotating the two links in the other direction in conjunction with the forward tilting operation of the seat bag or the opening operation of the vehicle door D. It is characterized by

[Functions and effects of the idea]

In a seat with such a configuration, when the vehicle door is closed and the seat back is raised, both links are biased in one direction by the second spring, and
Since rotation in the same direction is restricted by the stopper and held upright, the side rod urged upward by the first spring is locked in the raised position by the two upright links. Thereby, the seated person can be held from both sides by each side portion of the seat bag and the side portion of the seat cushion in the raised position.

On the other hand, when the vehicle door is opened or the seatback is tilted forward, both links are forced by the interlocking means to resist the force of the second spring and rotate in the opposite direction to the direction restricted by the stopper. Since both links fall down, the rear end side of the side rod, which is supported by both links so as to be able to rise and fall relative to the cushion frame, descends against the force of the first spring.
For this reason, it is possible to alleviate the restriction of forward tilting of the seat bag due to the side part of the seat bag coming into contact with the side part of the seat cushion, making it easier to get on and off the vehicle, and to make sure that the side part of the seat cushion is not in contact with the side part of the seat cushion. In terms of length, it is possible to ensure sufficient retention of the seat on both sides of the lumbar region of the seated person.

Therefore, in the present invention, the rear end side of the side rod is supported by both links to move up and down, and both links are rotated in a predetermined direction by an interlocking means in conjunction with the forward tilting operation of the seat back or the opening operation of the vehicle door. Since the seat cushion is configured to move, the side portion of the seat cushion can be lowered using the force of opening the vehicle door or the force of tilting the seat back forward. Therefore, there is no need to directly apply force to the side portions to lower them. Also, when the vehicle door is closed and the seat back is raised, both links are rotated by the force of the second spring and raised to the position regulated by the stopper, and as a result, the side rods are moved by the force of the first spring. The side part of the seat cushion automatically returns to the raised position and is locked.

As described above, according to the present invention, since the side portion rises and falls in conjunction with the tilting movement of the seat bag or the opening/closing movement of the vehicle door, the lifting and lowering operations are extremely simple and easy.

〔Example〕

The present invention will be explained below based on the drawings.
The figure shows a first embodiment of a vehicle seat according to the present invention. The seat is a front seat, and the seat cushion 10a has a cushion main body 11.
side parts 12a, 12b extending upward on both sides of the
In addition, the seat bag 10b has side portions 14 extending forward on both sides of the bag body 13.
a, 14b.

However, FIG. 2 shows the seat cushion 10a.
A cushion frame 20a and a locking mechanism 20b are shown. The cushion frame 20a includes each side rod 21 that constitutes each side portion 12a, 12b of the seat cushion 10a.
(Only the left side is shown) is a known type, which is assembled to the upper rail of the seat track and is movable in the front and back direction. Each side rod 21 has a gate shape and is assembled by the same means to a lower arm 22 protruding from each upper rail.

In each side rod 21,
As shown in the figure, a torsion spring 23b whose front end is attached to the front end of the lower arm 22 via a pin 23a so as to be rotatable in the vertical direction, and which is interposed between these two 22 and 23a as a first spring. is always urged in the direction of arrow A, that is, upward. On the other hand, the rear end of the side rod 21 is attached to the intermediate portion of the lower arm 22 via a lock mechanism 20b.

The lock mechanism 20b includes a pair of first links 24a,
It is composed of a second link 24b, a release lever 25, a tension spring 26 as a second spring, and a connecting cable 27. Both links 24
a, 24b are the release lever 25 and the pin 28a
The upper end of the first link 24a is rotatably connected to the rear end of the side rod 21 via a pin 28b, and the lower end of the second link 24b is rotatably connected via a pin 28c. It is rotatably assembled to the bracket 22a of the lower arm 22. The tension spring 26 is hooked onto the release lever 25 and the bracket 22b of the lower arm 22, and always urges the release lever 25 forward. Further, as shown in FIG. 3, a stopper 24c provided at the rear of the lower end of the first link 24a is brought into contact with the rear of the upper end of the second link 24b. As a result, the rotation of both links 24a and 24b by the tension spring 26 is restricted, and both links 2
4a, 24b are held upright, and the side rod 21 is locked in the raised position by both the upright links 24a, 24b. The cable 27 connects the release lever 25 and the upper arm 15 on the seat back 10b side.
and its outer tube 27a.
is fixed to the lower arm 22, and each end of its inner wire 27b is connected to the release lever 25 and the upper arm 15, respectively.

In the seat configured as described above, when the seat back 10b is raised, both links 24a and 24b are biased in one direction by the tension spring 26, and rotation in the same direction is restricted by the stopper 24c, so that the links 24a and 24b are held upright. Therefore, the side rod 2 is urged upward by the torsion spring 23b.
1 is locked in the raised position by both upright links 24a and 24b. As a result, each side portion 14a, 14b of the seat bag 10b and the side portion 12a, 12a of the seat cushion 10a in the raised position,
12b allows the seated person to be held from both sides.

On the other hand, when the seat back 10b is tilted forward, the inner wire 27b of the cable 27 is pulled rearward, forcing both links 24a, 24b to resist the force of the tension spring 26 and to be regulated by the stopper 24c. Since it is rotated in the opposite direction, both links 24a and 24b fall down, and the rear end side of the side rod 21, which is supported by both links 24a and 24b so as to be able to rise and fall relative to the lower arm 22, descends against the torsion spring 23b. do. For this reason, the side portion 1 of the seat bag 10b
4a, 14b abut against the side portions 12a, 12b of the seat cushion 10a, and the seat back 10b
This makes it easier to get on and off, and the seat cushion 1
By making the side portions 12a and 12b of Oa sufficiently long, it is possible to ensure sufficient retention of the seat on both sides of the lumbar region of the seated person.

However, in this embodiment, the side rod 2
The rear end side of the seat bag 10b is supported by both links 24a, 24b on the elevator, and both links 24a, 24b and the seat bag 10b are connected by a cable 27, and rotated in a predetermined direction in conjunction with the forward tilting operation of the seat bag 10b. Since it is configured to move, the seat back 1
The side portions 12a, 12b of the seat cushion 10a can be lowered by using the force of tilting the seat cushion 10a forward. Therefore, the side portions 12a, 1
There is no need to apply the direct force of 2b to lower it. Furthermore, when the seat back 10b is raised, both links 24a and 24b are rotated by the force of the tension spring 26 and raised to a position regulated by the stopper 24c, and as a result, the side rod 21 is moved from the torsion spring 23b. Rotates upwards with force,
Side portions 12a, 12 of seat cushion 10a
b automatically returns to the raised position and is locked.

In this way, according to this embodiment, the side portion 12
a, 12b are raised and lowered in conjunction with the tilting motion of the seat bag 10b, making the raising and lowering operation extremely simple and easy.

FIG. 5 shows a vehicle seat according to a second embodiment of the present invention. In the sheet,
Cable 29 and release lever 25 used
The first door is connected to the vehicle door D.
It has the same structure as the sheet in the example. As shown in FIGS. 5 and 6, the cable 29 has three outer tubes 29a ₁ to 29a ₃ and an inner wire 2.
9b ₁ to 29b ₃ , each inner wire 29b ₁
~ _29b3 are connected to each other by a coupler 29c. In other words, case 29c ₁ of Katsupura 29c
The ends of each of the outer tubes 29a ₁ to 29a ₃ are fixed to the outer ends of the inner wires 29b ₁ to 29a 3 .
29C ₁ penetrates and its end connects to slide block 2
Connected to 9c ₂ . This slide block 2
_The first inner wire 29b ₁ connected to the block 29c ₂ is connected to the release lever 25, and the second inner wire 29b ₂ is connected to the upper arm 15 _. A third inner wire _29b3 is connected to the door D near the pivoting base end.

Therefore, this seat operates in the same manner as the seat of the first embodiment, and even when door D is opened, the release lever 25 is pulled and both links 24a and 24b are moved rearward as shown by the two-dot chain line. As the seat cushion 10a rotates, each side portion 12a, 12b of the seat cushion 10a is unlocked, and the side portions 12a, 12b are lowered.

In addition, in the above embodiment, the seat bag 10
When the bag 10b is raised or the bag 10b is raised and the door is closed, both springs 23
Both links 24a, 24b return to rotation due to the biasing forces of b, 26, and each side portion 12a, 12b is locked in the raised position.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a seat according to the first embodiment of the present invention, Fig. 2 is an exploded perspective view of a cushion frame and a lock mechanism constituting the seat, and Figs. 3 and 4 are views of the seat cushion. Fig. 5 is an explanatory drawing corresponding to Fig. 3 in the seat according to the second embodiment, Fig. 6 is a sectional view of the cable connection part, and Figs. 7 and 8 are side views of the conventional seat. It is a diagram. Explanation of symbols, 10a... Seat cushion, 1
0b... Seat bag, 12a, 12b, 14
a, 14b...Side part, 20a...Cushion frame, 20b...Lock mechanism, 21...Side rod, 22...Lower arm, 24a, 24b
...Link, 24c...Stopper, 25...Release lever, 27, 29...Cable.

Claims (1)

[Scope of utility model registration request] For a vehicle, the seat cushion is provided with side portions projecting upward on both sides thereof, and the seat back is assembled so as to be tiltable in the longitudinal direction with respect to the seat cushion and stands up. Side portions projecting forward on both sides of the seat cushion. In the seat, the front end side of the side rod constituting the side portion of the seat cushion is attached to the cushion frame constituting the seat cushion so as to be rotatable in the vertical direction, and the rear end side is attached to the cushion frame. , a first link whose upper end is rotatably attached to the rear end side of the first link; and a first link whose lower end is rotatably attached to the cushion frame and whose upper end is rotatably connected to the lower end of the first link. Supported so as to be movable up and down via two links and biased upward by a first spring;
Both links are biased in one direction by a second spring, and rotation in the same direction is restricted by a stopper to hold both links upright, and the links are not allowed to tilt forward or tilt the seat back. A vehicle seat characterized by being provided with interlocking means for rotating in the other direction in conjunction with the opening operation of a vehicle door D.