JP2008228782A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle seat by which the attaching angle of an armrest to a seat back can be maintained at a using position comfortable to a sitting person. <P>SOLUTION: The vehicle seat includes a seat cushion 11, the seat back 12 freely turnably connected to the seat cushion, the armrest 13 freely turnably connected to the seat back, and a support member 14 whose base end and top end are freely turnably connected to the seat cushion and the armrest respectively. They constitute a parallel link 16 for which a straight line L1 connecting turning centers O1 and O3 is a fixed joint so that the armrest is turned to the other side direction to be on the opposite side to the seat back accompanying the turning in one side direction of the seat back to the seat cushion. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle seat provided with an armrest.

Conventionally, as a vehicular seat provided with an armrest, for example, what was indicated in patent documents 1 is known. In this vehicle seat, the armrest has a pivot center fixed on the seat back, and an adjustment lock mechanism is disposed at the pivot center portion, whereby the attachment angle with respect to the seat back is variable.
JP 2004-147791 A

  By the way, in Patent Document 1, although a locking mechanism for adjustment is provided, once the mounting angle with respect to the seat back is adjusted and set, the mounting angle is a so-called seat that rotates the seat back with respect to the seat cushion. Even if the reclining operation is performed, it is held.

  In this case, for example, when the seat back is tilted rearward, the armrest faces upward, and when the armrest is used, the mounting angle with respect to the seatback is adjusted again to the original use position comfortable for the seated person. There must be.

  The objective of this invention is providing the vehicle seat which can maintain the attachment angle of the armrest with respect to a seat back in a use position comfortable for a seated person.

  In order to solve the above problems, the invention according to claim 1 is a seat cushion, a seat back pivotally connected to the seat cushion, and an armrest pivotally connected to the seat back. A support member having a base end and a distal end rotatably connected to the seat cushion and the armrest, respectively, and the seat cushion, the seat back, the armrest, and the support member include the seat As the seat back pivots in one side direction with respect to the cushion, the pivot center of the seat back relative to the seat cushion is such that the armrest pivots in the other direction opposite to the seat back. A link device having a fixed node as a straight line connecting the rotation centers of the support members with respect to the seat cushion. And summarized in that by comprising configure.

  According to this configuration, the other side direction in which the armrest is opposite to the seat back as the link device (four-bar rotation chain) rotates in the one side direction of the seat back with respect to the seat cushion. To turn. Therefore, for example, even if the seat back is rotated in one direction to tilt backward, the upward amount is naturally reduced by the armrest rotating in the opposite direction. And the attachment angle of the said armrest with respect to the said seat back can be maintained in a use position comfortable for a seated person.

The gist of the invention according to claim 2 is that, in the vehicle seat according to claim 1, the link device is a parallel link.
According to this configuration, regardless of the rotational position (tilt) of the seat back, a straight line (fixed node) connecting the rotational center of the seat back with respect to the seat cushion and the rotational center of the support member with respect to the seat cushion. In addition, the mounting angle of the armrest can be maintained so that a straight line connecting the rotation center of the armrest with respect to the seat back and the rotation center of the support member with respect to the armrest is parallel. And the attachment angle of the said armrest with respect to the said seat back can be maintained in the fixed use position comfortable for the seated person on the basis of the seat surface of the said seat cushion.

  According to a third aspect of the present invention, there is provided a vehicle seat comprising: a seat cushion; a seat back that is pivotally connected to the seat cushion; and an armrest that is pivotally connected to the seat back. The gist is that the armrest rotates relative to the seat back in conjunction with the rotation of the back.

  According to this configuration, the armrest rotates in conjunction with the rotation of the seat back. Therefore, the angle of the armrest with respect to the seat back can be set to a comfortable use position for the seated person.

  According to the first to third aspects of the present invention, it is possible to provide a vehicle seat that can maintain the mounting angle of the armrest with respect to the seat back at a comfortable use position for the seated person.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a vehicle seat mounted on a vehicle such as an automobile according to the present embodiment. As shown in the figure, a seat back 12 is supported at a rear end portion of a seat cushion 11 attached to a vehicle floor, and an armrest 13 is supported at an intermediate portion in the vertical direction of the seat back 12. ing. A well-known seat reclining device (not shown) for adjusting and maintaining the rotational position (inclination) of the seat back 12 with respect to the seat cushion 11 is provided at the rotational center of the seat back 12.

  FIG. 2 is a side view schematically showing the vehicle seat according to the present embodiment. As shown in the figure, the seat back 12 is pivotally connected to the seat back 12 about a pivot center O1, and the armrest 13 is pivoted about the pivot center O2. 12 is rotatably connected. In addition, a rod-like support member 14 is provided on the rear side of the rotation centers O1 and O2, with a base end and a distal end connected to the seat cushion 11 and the armrest 13 so as to be rotatable about the rotation centers O3 and O4, respectively. ing. The straight line L1 that connects the rotation centers O1 and O3 and the straight line L2 that connects the rotation centers O2 and O4 have the same length and are arranged in parallel. The straight line L3 connecting the rotation centers O1 and O2 and the straight line L4 connecting the rotation centers O3 and O4 have the same length and are arranged in parallel. That is, the seat cushion 11, the seat back 12, the armrest 13 and the support member 14 constitute a parallel link 16 as a link device (four-node rotating chain) having the straight line L1 as a fixed node. Then, when the seat back 12 is rotated by a rotation angle a1 in the illustrated clockwise direction so as to incline backward with respect to the seat cushion 11, the armrest 13 is rotated counterclockwise in the illustrated direction so as to be opposite to the seat back 12. It is rotated by the same rotation angle b1 in the direction. On the contrary, when the seat back 12 is rotated in the counterclockwise rotation direction shown in the figure so as to tilt forward with respect to the seat cushion 11, the armrest 13 is opposite to the seat back 12. It rotates by the same rotation angle b2 in the rotation direction. In other words, the parallel link 16 is configured so that the armrest 13 is on the opposite side of the seat back 12 as the seat cushion 11 rotates (or in conjunction with the seat cushion 12). Acts to rotate in the lateral direction. In particular, the mounting angle of the armrest 13 is held by the parallel link 16 at a constant angle at which the straight lines L1 and L2 are parallel to each other regardless of the rotational position (tilt) of the seat back 12.

  FIGS. 3A, 3B, and 3C are schematic views showing changes in the mounting angle of the armrest 13 accompanying the rotation of the seat back 12 described above. 3A shows a state in which the seat back 12 is inclined forward, and FIGS. 3B and 3C show that the seat back 12 is moved backward from the state shown in FIG. The state which inclines is shown. As is clear from the figure, it is confirmed that the mounting angle of the armrest 13 is maintained at a constant angle at which the straight lines L1 and L2 are parallel to each other regardless of the rotational position (tilt) of the seat back 12. Is done.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) In this embodiment, the other side direction in which the armrest 13 is opposite to the seat back 12 by the parallel link 16 as the seat cushion 12 rotates in the one side direction with respect to the seat cushion 11. To turn. For example, even if the seat back 12 is rotated to tilt backward, the upward amount of the armrest 13 is naturally reduced by rotating the armrest 13 to the opposite side. Therefore, the mounting angle of the armrest 13 with respect to the seat back 12 can be maintained at a use position comfortable for a seated person. Further, it is not necessary to readjust the mounting angle of the armrest 13 as in the conventional example, and there is no need to provide an adjusting lock mechanism having a complicated structure.

  (2) In the present embodiment, the mounting angle of the armrest 13 can be maintained so that the straight lines L1 and L2 are parallel regardless of the rotational position (tilt) of the seat back 12. And the attachment angle of the said armrest 13 with respect to the said seat back 12 can be maintained in the fixed use position comfortable for the seated person on the basis of the seat surface of the said seat cushion 11. FIG.

In addition, you may change the said embodiment as follows.
In the above-described embodiment, the mounting angle of the armrest 13 that is maintained as a comfortable use position for the seated person is preferably set so that the longitudinal direction of the armrest 13 substantially coincides with the vehicle front-rear direction. It is not what is done.

  -In the said embodiment, with the rotation to the one side direction of the said seat back 12 with respect to the said seat cushion 11, it is a link apparatus which rotates to the other side direction where the said armrest 13 becomes the other side with respect to this seat back 12. If there is, it is not limited to the parallel link 16.

The perspective view which shows one Embodiment of this invention. The side view which shows the same embodiment typically. (A) (b) (c) is a side view which shows operation | movement of the embodiment.

Explanation of symbols

  L1, L2, L3, L4 ... straight line, O1, O2, O3, O4 ... rotation center, 11 ... seat cushion, 12 ... seat back, 13 ... armrest, 14 ... support member, 16 ... parallel link (link device).

Claims (3)

In a vehicle seat comprising: a seat cushion; a seat back that is pivotally coupled to the seat cushion; and an armrest that is pivotally coupled to the seat back.
A base end and a front end provided with a support member rotatably connected to the seat cushion and the armrest, respectively;
The seat cushion, the seat back, the armrest, and the support member are moved in the other direction in which the armrest is opposite to the seat back as the seat cushion is turned in one direction with respect to the seat cushion. A vehicle comprising a link device having a fixed node that is a straight line connecting a rotation center of the seat back with respect to the seat cushion and a rotation center of the support member with respect to the seat cushion so as to rotate. Sheet. The vehicle seat according to claim 1,
The vehicle seat, wherein the link device is a parallel link. In a vehicle seat comprising: a seat cushion; a seat back that is pivotally coupled to the seat cushion; and an armrest that is pivotally coupled to the seat back.
The armrest rotates with respect to the seat back in conjunction with the rotation of the seat back.

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