JP6362650B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat in which a seat back board is provided on the back of a seat back.

  As a vehicle seat provided with a seat back board on the back of the seat back, for example, there is JP-A-2005-225378 (Patent Document 1). In Patent Document 1, along with each edge of a pair of plate members facing each other, for the purpose of providing a hinge mechanism that can fold or unfold two plate members in a predetermined order with good operability. A pair of shaft portions, a hinge member that is rotatably coupled to the pair of shaft portions and simultaneously connects the shaft portions, and a sliding contact between the hinge member and the pair of shaft portions. A biaxial hinge mechanism, each of which is disposed in a plane, and includes a stopper portion that regulates a range in which the hinge member and the shaft portion can rotate relative to each other, and each sliding contact between the hinge member and the shaft portions. A fitting that allows relative rotation between the hinge member and the shaft portion constituting the sliding contact surface when a turning force of a predetermined value or more is applied between the pair of plate members on at least one side of the surfaces. Two axes characterized by a mechanism Nji mechanism is disclosed.

JP 2005-225378 A

  In Patent Literature 1, two plate members can be folded or unfolded in a predetermined order with good operability by a predetermined biaxial hinge mechanism. However, since the fixed biaxial hinge structure is used, there is a limit to the length after the plate member is deployed, and no consideration is given to making the length after the deployment longer.

  This invention is made | formed in view of these subjects, Comprising: It aims at providing the vehicle seat with a seat back board which can take the length after seat back board expansion | deployment more.

In order to solve the above-described problems, the present invention is, as an example, a vehicle seat having a seat back board on the back of the seat back, the seat back board having a slit hole at an end, and the seat The back surface has a first fixing portion and a second fixing portion for fixing the two end portions of the strap, respectively. One end of the strap inserted from one of the slit holes is fixed to the first fixing portion, and the other end of the strap is fixed. The seat back board is fixed to the second fixing portion, and the seat back board is rotatably fixed to the back of the seat back via a strap.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle seat with a seat back board which can take the length after seat back board expansion | deployment can be provided.

FIG. 3 is a schematic perspective view of the seat backboard in a stored state and a developed state in Example 1. 1 is a schematic enlarged perspective view of a seat back board in a developed state in Embodiment 1. FIG. It is a strap hinge structure explanatory drawing of the seat back board in Example 1. FIG. FIG. 3 is a schematic cross-sectional view of a sewn pool of a seat backboard strap in the first embodiment. It is guide structure explanatory drawing at the time of expansion | deployment of the seat back board in Example 1. FIG. FIG. 10 is a view for explaining positioning of a seat back board in the second embodiment. It is explanatory drawing of accommodation and expansion | deployment of the conventional seat back board.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, a vehicle seat having a seat back board on the back of a seat back, which is a premise of the present invention, will be described.

  FIG. 7 is an explanatory view of storing and unfolding a seat back board of a conventional vehicle seat with a seat back board. In FIG. 7, the vehicle seat 1 includes a seat back 2 and a seat cushion 3, and a seat back board 4 on the back surface of the seat back 2. FIG. 7A shows a state where the seat back board 4 is stored in the seat back 2, and FIG. 7B shows a state where the seat back board 4 is developed. The deployment of the seat back board 4 causes the seat cushion 3 to deploy the seat back board 4 in a state where the seat back 2 is moved forward. As shown in FIG. 7B, when the seat back board 4 is hinged to the lower back of the seat back 2 and the hinge structure is a hinge structure coaxial with the rotation axis, the rotation center 5 is the center. The seat back board 4 is developed. That is, the unfolded length of the seat back board 4 is equal to the length of the seat back board 4 from the rotation center 5, and the seat back board 4 is accommodated in the seat back 2. Can't be long.

  In order to provide a wide floor surface on the rear floor by deploying the seat back board rearward, it is desirable that the seat back board has a longer length after deployment. In addition, when the seat back board 4 is stored in the seat back 2, it is desirable that the seat back board 4 is stored in a position as low as possible in terms of appearance and safety.

  Therefore, in this embodiment, the hinge connection between the seat back board 4 and the lower back of the seat back 2 is a hinge structure using a strap, so that it can be stored in a position as low as possible when stored in the seat back. The vehicle seat with a seat back board that can be used longer after the seat back board is deployed will be described in detail below with reference to the drawings.

  FIG. 1 is a schematic perspective view of a seat backboard in a stored state and a developed state in the present embodiment. The same components as those in FIG. 7 are denoted by the same reference numerals, and the description thereof is omitted.

  1A shows a state in which the seat back board 4 is housed in the seat back 2 in a state where the seat back 2 is moved forward, and FIG. 1B shows the state of the seat back board 4. A part is shown expanded. In FIG. 1A, reference numeral 6 denotes a strap strap lower strap, and two lower straps 6 are used for each of two seat back boards 4 so that the lower strap 6 passes through the seat back board 4. Thus, the seat back board 4 is fixed to the seat back 2. Reference numeral 7 denotes an upper strap for binding and fixing the seat back board 4 when the seat back board 4 is stored in the seat back 2.

  In FIG. 1B, in the state in which one seat back board 4 is developed, the seat back board 4 is positioned by a position restricting member formed by a guide block 8 and a recess 9 described later.

  FIG. 2 shows a schematic enlarged perspective view of the seat back board in the unfolded state from the W direction in FIG. In FIG. 2, the lower strap 6 fixes the seat back board 4 to the seat back 2 via the strap garnish 10. Further, the seat back board 4 is positioned at the time of deployment by a guide block 8 which will be described in detail later.

  FIG. 3 shows a strap hinge structure explanatory diagram of the seat back board 4 in the AA section and the BB section in FIG.

  FIG. 3A shows a state in which the seat back board 4 in the AA cross section in FIG. 1B is housed in the seat back 2, and the lower strap 6 is a strap garnish 10 which is a first fixing portion. One end of the seat back board 4 is fixed, and the other end of the seat back board 4 is fixed by the strap garnish 10 via the edge of the seat back board 4 via the edge of the seat back board 4. Is fixed to the seat back 2 so as to be rotatable.

  FIG. 3B is a view in the middle of developing the seat back board 4, and the sewing pool 12 provided in the middle of the lower strap 6 is regulated by the board slit hole 11 and serves as a stopper.

  FIG. 4 shows a schematic cross-sectional view of the sewing pool 12. For example, the strap is folded three times and sewed on the original strap to form a thickness four times the thickness of the strap. By making the opening width of the slit hole 11 smaller than this, the sewing pool 12 serves as a stopper. As a result, the sewn pool 12 is caught in the board slit hole 11 while the seat back board 4 is being deployed, leading to an operation of tilting the seat back board 4. Since the sewing pool 12 only needs to be caught in the board slit hole 11, it only needs to have a thickness larger than the opening width of the board slit hole 11 and is not limited to the configuration shown in FIG. 4.

  FIG. 3C is a view showing a state in which the seat back board 4 is further developed. In a state where the sewing pool 12 is caught in the board slit hole 11, the seat back board 4 is inverted and its end portion is By sliding along the guide wire 13, the seat back board 4 can be easily pushed down, and the seat back board 4 can be smoothly deployed.

  FIG. 5 shows a detailed schematic diagram of the guide wire 13, which is composed of, for example, a U-shaped wire, provided on the back surface of the seat back 2, and configured so that the seat back board 4 slides thereon. ing. Note that the number of guide wires 13 is not limited to two, and may be one or more than two.

  FIG. 3D shows a state in which the development of the seat back board 4 in the BB cross section in FIG. 1B is completed, from one end fixed to the strap garnish 10 of the lower strap 6 to the sewing pool 12. The position of the seat back board 4 is determined at this position.

As described above, the present embodiment is a vehicle seat in which a seat back board is provided on the back of the seat back, the seat back board is provided with a slit hole at the end, and the back of the seat back has two ends of the strap. Each having a first fixing portion and a second fixing portion, one end of the strap inserted from one of the slit holes is fixed to the first fixing portion, and the other end of the strap is fixed to the second fixing portion. The seat back board is configured to be pivotally fixed to the back of the seat back via a strap.

  In addition, the strap has a stopper part larger than the opening width of the slit hole in a part thereof, and when the seat back board is unfolded from the back of the seat back, the stopper part is caught in the slit hole so that the first fixing part And a strap to the stopper portion so that the position of the seat back board and the back of the seat back is fixed.

  In other words, in the present embodiment, the coupling between the seat back board and the seat back is a hinge structure using a strap, so that the coupling between the seat back board and the seat back becomes loose, and the degree of freedom of the coupling position increases. Therefore, when the seat back board is stored in the seat back, the seat back board can be stored in a position as low as possible, and the seat back board can be used longer after the seat back board is deployed. In other words, it is possible to mount a seat back board that is longer than the back of the seat back, and to provide a vehicle seat with a seat back board that can be used for a longer length of the deployed seat back board.

  In the present embodiment, an example in which positioning of the seat back board when the seat back is stored and when the seat back board is deployed will be described.

  FIG. 6 is a view for explaining the positioning of the seat back board 4 in the CC cross section and the DD cross section in FIG.

  FIG. 6A shows a cross-sectional view in a state where the seat back board 4 in the CC cross section in FIG. 1B is stored in the seat back 2, and the guide block 8 is provided on the seat back 2. The seat back board 4 can be positioned in a state in which the seat back board 4 is housed in the seat back 2 by being engaged with the recess 9 provided in the seat back board 4.

  FIG. 6B shows a cross-sectional view in a state where the development of the seat back board 4 in the DD cross section in FIG. 1B is completed, and the seat back is mounted on the guide block 8 provided in the seat back 2. By abutting the tip of the board 4, the seat back board 4 after the seat back board 4 is deployed can be positioned. One guide block 8 and one recess 9 may be provided for each seat back board, or a plurality of guide blocks 8 and recesses 9 may be provided.

  Although the embodiments have been described above, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is also possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

1: Vehicle seat, 2: Seat back, 3: Seat cushion, 4: Seat back board, 5: Center of rotation, 6: Lower strap, 7: Upper strap, 8: Guide block, 9: Recess, 10: Strap garnish , 11: board slit hole, 12: sewing pool, 13: guide wire

Claims (7)

A vehicle seat provided with a seat back board on the back of the seat back,
The seat back board is provided with slit holes at the ends,
The back of the seat back has a first fixing part and a second fixing part for fixing the two ends of the strap,
One end of the strap inserted from one side of the slit hole is fixed to the first fixing portion, the other end of the strap is fixed to the second fixing portion, and the seat back board is connected to the first fixing portion via the strap. A vehicle seat characterized in that it is pivotally fixed to the back of the seat back. The vehicle seat according to claim 1,
The strap has a stopper part larger than the opening width of the slit hole in a part thereof,
When the seat back board is unfolded from the back of the seat back, the stopper is hooked into the slit hole so that the strap to the first fixing portion and the stopper portion causes the seat back board and the back of the seat back. The position of the vehicle is fixed. The vehicle seat according to claim 2,
The vehicle seat according to claim 1, wherein the stopper portion is a sewing pool of the strap. The vehicle seat according to any one of claims 1 to 3,
A vehicular seat comprising a guide wire on the back of the seat back that slides an end portion of the back of the seat back when the seat back board rotates the back of the seat back via the strap. The vehicle seat according to claim 4,
The vehicle seat characterized in that the guide wire is formed of a U-shaped wire. The vehicle seat according to any one of claims 1 to 5,
A guide block on the back of the seat back;
The seat back board has a recess,
In a state where the seat back board is stored on the back of the seat back, the seat back board can be positioned by fitting the guide block and the recess. The vehicle seat according to any one of claims 1 to 5,
A guide block on the back of the seat back;
The vehicle seat, wherein the seat back board can be positioned by abutting a leading end of the seat back board against the guide block in a state where the seat back board is unfolded from the back of the seat back.

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