JPH0321639Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a vehicle seat, and more specifically, a seat back is attached to the rear of the seat cushion via a reclining mechanism so as to be tiltable back and forth. The present invention relates to a vehicle seat in which a seat cushion is movable and adjustable in the front-rear direction by a front-rear slide mechanism.

[Conventional technology]

BACKGROUND ART Conventionally, there have been seat cushions and seat backs in which side support portions are formed in order to improve the holding feeling of a seated person. When side support parts are formed on these seat cushions and seat backs, they have the disadvantage of obstructing the seated person's getting on and off the seat. Various devices have been proposed in which the part is locked in the support position by a locking mechanism. In addition, in two-door type vehicles, etc., a walk-in mechanism is adopted that moves the entire seat forward when the seat back is tilted forward, and when this walk-in mechanism is activated, the side support part 2
2 and 23 are in contact with each other, as shown by the imaginary lines in FIGS. 4 and 5, and the seat back 3 cannot be tilted forward sufficiently, which obstructs the rear seat occupant from getting in and out of the seat.

[Problem that the invention attempts to solve]

In conventional seats, it is not possible to form the side support portions sufficiently large, and when the side support portions are formed to be rotatable, it is necessary to securely lock the side support portions in the support position. This has the disadvantage that the locking mechanism must be operated one by one to release the locking mechanism, making the work complicated.

[Means for solving problems]

The present invention was developed in view of the above-mentioned problems.The seat back is attached to the rear part of the seat cushion through a reclining mechanism so that it can be tilted back and forth, and the seat cushion is moved in the front and back direction by a front and rear sliding mechanism. In the adjustable vehicle seat, a side support portion is formed on the seat back, and the side support portion includes support wires attached to rotation brackets pivotally connected to both sides of the seat back frame;
A locking mechanism having a spring member for rotationally biasing the support wire and a locking member for locking the support wire at the support position, the locking member being slidably attached along the longitudinal direction of the seat back frame. and is biased by a spring in a direction to engage the pivot bracket, one end of a connecting wire is fixed to the locking member, the other end of the connecting wire is fixed to the base of the reclining mechanism, When the seat back is tilted forward, the connecting wire pulls the lock member downward against the bias of the spring, so that the lock member is disengaged from the rotation bracket and the side support portion can be rotated. It is characterized by being composed of

[Effect]

According to the vehicle seat according to the present invention, by tilting the seat back forward, the connecting wire is automatically pulled, and the locking mechanism that locks the support wire in the support position is released by the connecting wire.
By rotating the side support part inward or outward, the seat back can be sufficiently rotated forward, making it possible to significantly facilitate the getting on and off of the rear seat occupant.

〔Example〕

The vehicle seat according to the present invention will be described in detail below with reference to the drawings.

1 to 4 schematically show an embodiment of the present invention, and this vehicle seat 1 includes a seat cushion 2, and a reclining mechanism 4 provided at the rear of the seat cushion 2, which is connected to the front and back of the vehicle. The seat cushion 2 is mounted so as to be movable in the front-rear direction by a fixed rail 6 and a movable rail 7 of a front-rear slide mechanism 5.

A base 14 of the reclining mechanism 4 is fixed to the seat cushion frame 12 , and an arm 15 is fixed to the seat back frame 13 .
It is mounted rotatably relative to the Side support portions 22 and 23 are formed on the seat cushion 2 and the seat back 3, respectively. In this embodiment, the side support portion 22 of the seat cushion 2
is shown as being fixedly formed, and the side support portion 23 of the seat back 3 is rotatably formed, but both side support portions 22, 23
may be rotatable.

The side support portion 23 of the seat bag 3 includes a support wire 35 that is attached to rotating brackets 33 and 34 that are pivotally attached to both sides of the seat bag frame 13, and is rotatably supported with respect to the seat bag frame 13. A spring member 36 that urges the support wire 35 inward from the support position.
It has Note that the support wire 35 may be biased outwardly by this spring member 36, and if the side support portion 22 of the seat cushion 2 is also rotatable, either one of the side support portions 22, 23 It can be formed so that one is biased inwardly and the other is biased outwardly. A lock mechanism 41 is provided to restrict rotation of the support wire 35.

As shown in FIG. 3, the locking mechanism 41 has a locking member 42 having an engaging protrusion 43 provided below the lower rotating bracket 34, and this locking member 42 is connected to the seat back frame 13. It is slidably mounted in its longitudinal direction.
An engagement groove 44 is formed in the rotation bracket 34, and when engaged with the engagement protrusion 43, the support wire 35 is held at the support position. Incidentally, the engaging protrusion 43 and the engaging groove 44 can each have a reverse configuration or a locking tooth configuration. Further, the lock member 42 is normally urged upward in the direction of the engagement groove 44 by a spring 45. One end 47a of a connecting wire 47 is fixed to the lock member 42, and the other end 47b is attached to the base 14 of the reclining mechanism 4.
It is fixed at a position with an appropriate distance from the pivot pin 16 of. The other end 47b of the connecting wire 47 is connected to the seatback frame 13, that is, when the arm 15 is tilted forward, the intermediate position of the connecting wire 47 is connected to the arm 15.
one end 4 of the connecting wire 47.
7a is pulled downward, and one end 4 of the connecting wire 47
The lock member 42 fixed to the spring 4
It is pulled downward against the bias of 5. In this embodiment, only the locking mechanism 41 on one side is shown, but both sides are operated at the same time, and the locking mechanism 41 on both sides is the same, or the locked state of one side can be changed to the other using a connecting rod or a connecting wire. Various aspects such as a structure for transmitting the lock mechanism 41 are possible.
The support wires 35 are not limited to those shown in the drawings, but any structure that can simultaneously operate the left and right support portions 23 using a connecting wire or the like may be used when the support wire 35 is to be locked with a hook or the like.

The above is the configuration of an embodiment of the vehicle seat according to the present invention. In such a configuration, when the seat back 3 is tilted forward, the arm 15 of the reclining mechanism 4 rotates, and the connection is made in accordance with this rotation. wire 4
7 is the locking member 4 in the downward direction indicated by arrow a in FIG.
2, the engagement protrusion 43 of the locking member 42 is disengaged from the engagement groove 44 of the rotation bracket 34, and the support wires 35 on both sides are urged inward in the direction of arrow b by the urging force of the spring member 36. The side support portions 23 on both sides rotate inward. Therefore, as shown in FIGS. 4 and 5, when the seat back 3 is tilted forward onto the upper part of the seat cushion 2, the seat back 3 cannot be fully moved, as shown by the solid line, despite the presence of the side support parts 22 and 23. It is possible to lean forward. Next, when the seat back 3 is tilted backward and the side support portion 23 is pressed outward, the lock member 42 releases the spring 45.
Since the engaging groove 44 of the rotating bracket 34 is rotated to the position of the engaging protrusion 43, the rotating bracket 34 and the support wire 35 are in a locked state, and the side support part 2
3 is the seat back frame 13 at a predetermined inclination angle.
held against.

[Effect of idea]

The above is the configuration of one embodiment of the present invention. According to this configuration, the side support parts can be formed sufficiently large to further improve the holding feeling, and the side support parts on both sides can be placed in front of the seat back. The seat back can be rotated inward or outward in conjunction with the tilt, and in this case, the amount of forward tilt of the seat back can be increased without the need to manually activate the lock mechanism, making it easier for rear seat passengers to get in and out of the seat. It is possible to obtain a vehicle seat that can significantly facilitate the process.

[Brief explanation of the drawing]

1 to 5 each schematically show an embodiment of a vehicle seat according to the present invention. FIG. 1 is a perspective view showing the frame structure of the seat, and FIG. 2 shows the operating state of the support wire. The upper part shown is a plane, the lower part is an explanatory view of the operation seen from the side, Fig. 3 is a perspective view of the lock mechanism, and Figs. 4 and 5 are an explanatory side view and a front explanatory view with the seat back tilted forward. . In the figure, 1... Vehicle seat, 2... Seat cushion, 3... Seat back, 4... Reclining mechanism, 5... Front and rear sliding mechanism, 12... Seat cushion frame, 13... Seat back frame, 14...Base, 15...Arm, 2
2, 23... Side support section, 33, 34...
Rotating bracket, 35...Support wire, 36
... Spring member, 41 ... Lock mechanism, 42 ... Lock member, 43 ... Engagement protrusion, 44 ... Engagement groove,
47...Connecting wire.

Claims (1)

[Scope of utility model registration request] In a vehicle seat in which a seat back is attached to the rear part of the seat cushion so as to be tiltable back and forth via a reclining mechanism, and the seat cushion is movable and adjustable in the front and back direction by a back and forth sliding mechanism, the seat back includes a side support section. The side support portion includes a support wire attached to a rotation bracket pivotally attached to both sides of the seatback frame, a spring member for biasing the support wire to rotate, and a spring member for rotating the support wire at the support position. and a locking mechanism having a locking member, the locking member being slidably attached along the longitudinal direction of the seatback frame and biased by a spring in a direction to engage with the rotating bracket. , one end of a connecting wire is fixed to the locking member, and the other end of the connecting wire is fixed to the base of the reclining mechanism, and when the seat bag is tilted forward, the connecting wire causes the locking member to reverse the bias of the spring. 1. A vehicle seat characterized in that the locking member is disengaged from the rotating bracket by pulling the locking member downward, and the side support portion can be rotated.