JP4693478B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat in which a seat back can be folded on a seat cushion and a back surface of the seat back can be used as a table.

As a vehicle seat that can be used as a table on the back of the conventional seat back, a recess is formed in the center of the back of the seat back, and the table board is fitted into the recess, and the table board is linked. There is provided a vehicle seat that can be moved in and out of the recess by a mechanism and that tableware can be placed on a table board in a state of protruding from the recess. In order to keep the back of the seat back folded on the seat cushion of the vehicle seat horizontal, the seat cushion is flattened in relation to the front of the folded seat back (see, for example, Patent Document 1). .)
Japanese Utility Model Publication No. 6-006083

  Since such a vehicle seat is desired to be flat on the seat cushion, the ride comfort is not good. Therefore, the front side on the seat cushion is raised, the rear side is lowered to improve riding comfort, and the seat back is pivotally supported by the reclining device so that the lower end portion thereof can be rotated back and forth, Two positions, a standing position substantially along the extension line of the first back member and a folding position on the seat cushion by a folding rotation lock device with respect to a portion which becomes an upper end portion in a neutral position where the first back member is erected It is comprised from the 2nd back member by which a lower end part is pivotally supported so that back-and-forth rotation is possible.

  However, in such a conventional technique, two operations, that is, one operation for operating the reclining device and one operation for operating the folding rotation lock device must be operated, which is cumbersome and requires improvement. ing. In addition, it is necessary to prepare operation means for two operations, which causes a rise in cost.

  The present invention has been made by paying attention to such a conventional technique. When the reclining device is operated, the folding rotation lock device can be operated with only one operation. It is intended to provide a vehicle seat that can reduce the above.

According to the first aspect of the present invention, the seat back is pivotally supported so as to be able to rotate back and forth from a neutral position where the seat back is erected by the reclining device, and the seat back is pivoted so that a lower end portion thereof can be rotated back and forth by the reclining device. erected substantially along an extension of said first back member and the first back member formed by supported by folding rotary locking device with respect to the site to be the upper end in the neutral position where the first back member erected In a vehicle seat composed of a second back member having a lower end pivotally supported so as to be able to rotate back and forth between a position and a folded position on a seat cushion, by one operation of the reclining device , when the first back member reaches a predetermined rotational angle, the folding rotation lock device the second back member locking is released of the Sea Lock configured to folding operation is possible on the cushion, the reclining device, to prevent the reclining hinge formed by rotatably supported to the lower end portion of the first back member, the rotation of the first back member A reclining lock device that can be controlled to any one of a position and a lock-off position that enables rotation of the first back member, and a first arm that can operate the lock-off of the reclining lock device by operating means. The folding rotation lock device includes a table hinge that rotatably supports a lower end portion of the second back member, a lock position that prevents rotation of the second back member, and rotation of the second back member. Table lock device that can be controlled at any of the lock-off positions enabling the lock, and locking of the table lock device It is more structure and the second arm Naru operable to off, the first arm of the reclining device, between the second arm of the folding rotary locking device, the first back member at a predetermined rotation angle A connecting means that can be operated to lock off the table lock device via the second arm by reaching, the connecting part of the first arm connected to the connecting means via a connecting part; and A long hole along a straight line connecting the other connecting portion of the second arm connected to the connecting means via another connecting portion is formed in the connecting means .

According to the invention of claim 1, when the reclining device is operated, the reclining lock is released without the folding rotation lock device being locked off, and the seat back including the first back member moves to a predetermined rotation angle, Upon reaching the said predetermined angle, said a folding rotary locking device released, the second back member since it is folding operation on the seat cushion, improved merchantability, costs can be reduced. Further, the table lock device is interposed between the first arm of the reclining device and the second arm of the folding rotation lock device via the second arm when the first back member reaches a predetermined rotation angle. Since the connecting means capable of performing the lock-off operation is connected, the table lock device connected to the second arm is locked off only by operating the connecting means, and the second back member is folded forward, 2 The back of the back member is a table. Since the second back member is supported at a position high enough not to touch the seat cushion, the seat cushion can be made thick enough to be comfortable to sit on. Further, a length along a straight line connecting the connecting portion of the first arm connected to the connecting means via a connecting portion and the other connecting portion of the second arm connected to the connecting means via another connecting portion. Since the hole is formed in the connecting means, when any of the connecting parts moves in the elongated hole, the lock-off does not work, and the second back member does not fall forward in an inadvertent position. It will be .

When you operate the reclining device, that the target of the operation is a folding rotation locking device as it is only a single operation to improve the marketability, the cost to provide a vehicle seat that is to be able to reduce, the goal, the seat back The seat back is pivotally supported to be able to rotate back and forth from a neutral position erected by the reclining device, and the seat back has a first back member whose lower end is pivotally supported to be able to rotate back and forth by the reclining device; upright position and second position of the folding position on the seat cushion substantially along on an extension line of the first back member by rotating the locking device folded with respect to the site to be the upper end in the neutral position where the first back member erected A vehicle seat comprising a second back member having a lower end pivotally supported so as to be able to rotate back and forth between According to an operation of the reclining device, the the first back member reaches a predetermined rotational angle, so that the folding rotation lock device the second back member locking is released the folding operation is possible on the seat cushion The reclining device includes a reclining hinge that rotatably supports a lower end portion of the first back member, a lock position that prevents rotation of the first back member, and rotation of the first back member. A reclining lock device that can be controlled to any one of the lock-off positions to be enabled, and a first arm that can be operated to lock off the reclining lock device by operating means, and the folding rotation locking device includes: a table hinge formed by rotatably supported to the lower end portion of the second back member, the second back A table lock device that can be controlled to any one of a lock position that prevents rotation of the member and a lock-off position that enables rotation of the second back member; and a second arm that can operate the lock-off of the table lock device; The first back member reaches a predetermined rotation angle between the first arm of the reclining device and the second arm of the folding rotation lock device via the second arm. And connecting means for operating the table lock device to lock off, the first arm connecting part connected to the connecting means via a connecting part, and the connecting means via another connecting part. This is realized by forming a long hole along the straight line connecting the other connecting portion of the second arm connected in this way in the connecting means .

  Hereinafter, the best embodiment of the present invention will be described with reference to FIGS. Reference numeral 1 denotes a seat of an automobile as a “vehicle”. The seat 1 may be a driver seat, a passenger seat, or a rear seat. HP is a hip point.

  The seat 1 includes a seat cushion 2 and a seat back 3, and the seat back 3 is erected as shown in FIG. 4 by a reclining device 4 fixed to the seat cushion 2 and the seat back 3, respectively. From the neutral position N, it is rotatably supported at a position F rotated to the front side FR and a position R rotated to the rear side RR shown in FIGS. Reference numeral 5 denotes a headrest.

  The neutral position N of the seat back 3 is 21 degrees with respect to the vertical line P and tilted toward the rear RR about the hip point HP. The full flat position F at which the seat back 3 is inclined most toward the rear side RR is 74 degrees with respect to the neutral position N at an angle θ2 inclined toward the rear side RR about the hip point HP. The forward tilt position T at which the seat back 3 is most tilted to the front side FR is 84 degrees with respect to the vertical line P and the angle θ3 tilted to the front side FR about the hip point HP.

  The seat back 3 includes a first back member 7 in which a lower end portion 7a is rotatably supported by the reclining device 4 to the front side FR and the rear side RR, and a neutral position where the first back member 7 is erected. N (see FIG. 4) is folded over the portion that becomes the upper end portion 7b by the rotation lock device 8 on the extension line of the first back member 7, that is, the standing position Na substantially along the elongated first back member 7 (FIG. 4) and a second back member 9 on which a lower end portion 9a is pivotally supported so as to be able to rotate back and forth between two positions of a folding position T (see FIG. 8) on the seat cushion 2. The headrest 5 is supported by the upper end portion 9b of the second back member 9 so as to be slidable in the vertical direction UP and DW.

  By performing an operation different from the reclining device 4 once, the reclining device 4 can be moved to change the longitudinal angle of the seat back 3. When the first back member 7 of the seat back 3 reaches a predetermined rotation angle, that is, the neutral position N, the folding rotation lock device 8 is unlocked, and only the second back member 9 with respect to the first back member 7 is released. Is configured to fold on the seat cushion 2 and will be described in detail below. Although the predetermined rotation angle is set to the neutral position N for convenience of explanation, the present invention is not limited to the neutral position N and may be determined as appropriate.

  The reclining device 4 includes a base member 22 fixed to the seat cushion 2, a reclining hinge 10 pivotally supported by the base member 22, a reclining lock device 11, an operating means 21, and a connecting bar 27. And a rotating plate 24 and a winding spring 29.

  The reclining lock device 11 can be controlled to a lock position that prevents rotation of the back frame 28 that constitutes the first back member 7 and a lock-off position that enables rotation, with the reclining hinge 10 as the center. And

  The operation means 21 is rotatably supported by the base member 22 by a third connecting pin 25 and can prevent the reclining lock device 11 from rotating to the lock position and the lock-off position.

  The rotating plate 24 is rotatably supported by the reclining hinge 10 and has a first arm 12 and a third arm 23 protruding in different directions.

  The connection bar 27 is formed by connecting the operation lever 21 and the reclining lock device 11 by a fourth connection pin 26.

  One end of the winding spring 29 is supported by the reclining hinge 10 and the other end is supported by the base member 22, and the back frame 28 constituting the first back member 7 is always urged to the front side FR.

  A second elongated hole 35 is formed on the other end side of the connecting bar 27, and a sixth connecting pin 34 is engaged therewith. The second long hole 35 is formed to have a size capable of absorbing the movement allowance from the state of falling to the rear side RR shown in FIG. 2 to the standing position shown in FIG. 6 or FIG.

  A fifth connecting pin 33 is supported on the third arm 23, and an appropriate operating means (not shown) of the present invention is supported on the fifth connecting pin 33, so that an operating force can be applied in the direction of arrow F. It has become.

  The reclining lock device 11 is formed with a pushing portion 36 formed in the vicinity of the third arm 23. When the fifth connecting pin 33 is urged clockwise in the drawing, the pushing portion 36 is formed. Presses the reclining lock device 11 so that the lock of the reclining lock device 11 can be released.

  The folding rotation lock device 8 includes a table hinge 13, a table lock device 14, a second arm 15, and a winding spring 31.

  The table hinge 13 is an end of the upper UP at the neutral position N of the first back member 7 (as shown in FIG. 2, the end of the rear RR is the end of the rear RR when it is in the collapsed state). The upper end of the frame 28 (same meaning as the first back member 7) and the lower end 9a of the second back member 9 are rotatably supported.

  The table lock device 14 is configured to be controllable to either a lock position that prevents rotation of the second back member 9 or a lock-off position that enables rotation of the second back member 9.

  The second arm 15 is pivotally supported by the table hinge 13 and is rear RR at the neutral position N of the first back member 7 (as shown in FIG. The table lock device 14 can be operated to be locked off by being formed to protrude on the side DW).

  One end of the winding spring 31 is supported by the back frame 28 of the first back member 7 and the other end is supported by the back frame 30 of the second back member 9, and the second back member 9 is always attached to the first back member 9. 1 The front member 7 is biased to the front side FR at the neutral position N (upper side UP in the state where the rear member RR is collapsed as shown in FIG. 2).

  The first back member 7 reaches a predetermined rotation angle between the first arm 12 of the reclining device 4 and the second arm 15 of the folding rotation lock device 8, so that the second arm 15 is interposed. Thus, the lower end portion 16a of the connecting means 16 capable of performing the lock-off operation of the table locking device 14 is the first connecting pin 17 that is the “connecting portion”, and the upper end portion 16b of the connecting means 16 is the “other connecting portion”. Each of the second connection pins 20 is rotatably connected to each other. An elongated hole 19 along a straight line 18 connecting the first connecting pin 17 and the second connecting pin 20 of the connecting means 16 is the end of the upper UP at the neutral position N of the first back member 7 (as shown in FIG. 2). In addition, it is formed on the most rear side RR) in a state where it falls to the rear side RR.

  As shown in FIG. 5, a switch 32 for an occupant seated in a rear seat (not shown) is disposed on the back of the seat back 3, and the switch 32 has the same function as the operation means 21. The reclining lock 11 is released.

  As shown in FIG. 3, the angle θ4 of the table hinge 13 with respect to the horizontal line H that extends the position of the reclining hinge 10 horizontally is arranged at the position of the lower DW by 4 degrees. From the state shown in FIG. 3 to the state shown in FIG. 7, that is, the second connection in the long hole 19 while the seat back 3 moves from the full flat position F to the neutral position N (and vice versa). The pin 20 is freely movable.

  Then, when reaching the neutral position N of the seat back 3 shown in FIG. 7, the second connecting pin 20 that has been loosened in the long hole 9 reaches the upper end of the long hole 9, as indicated by the arrow of the rotating plate 24. With the clockwise rotation to the front side FR, the connecting means 16 is pulled to the lower side DW as indicated by the arrow, and the second arm 15 is rotated about the table hinge 13 in the clockwise direction by the movement of the second connecting pin 20. Then, by releasing the table lock device 14, the second back member 9 can fall into the front side FR. In this state, the angle θ5 to one end of the long hole 19 with respect to the horizontal line H is about 52 degrees, and the angle θ6 from the angle θ5 to the other end is about 23 degrees. is there.

  Next, the operation of this embodiment will be described.

  When the fifth connecting pin 33 is pulled to the front side FR, the rotating plate 24 rotates clockwise, and the pushing portion 36 of the rotating plate 24 presses the reclining lock device 11 of the reclining device 4 to release the lock. Until the first back member 7 reaches the neutral position N which is a predetermined rotation angle, the first back member 7 is loosely moved in the long hole 19 of the connecting means 16 connected to the first arm 12, and the folding rotation lock device 8 is locked. It will not be released.

  When the first back member 7 reaches the neutral position N, which is a predetermined rotation angle, by the winding spring 29, the second connecting pin 20 comes into contact with the end of the long hole 19 and the second arm 15 is pulled down by the pulling-down force of the connecting means 16. Rotates and the folding rotation lock device 8 is released. When the folding rotation lock device 8 is released, the second back member 9 is folded on the seat cushion 2 so that the fifth connection pin 33 is pulled to the front FR, whereby the folding rotation lock device is moved. Since it can be canceled, merchantability is improved and costs can be reduced.

  Between the first arm 12 of the reclining device 4 and the second arm 15 of the folding rotation lock device 8, the first back member 7 reaches the neutral position N that is a predetermined rotation angle. Since the connecting means 16 capable of operating the table lock device 14 to be locked off via the arm 15 is connected, the table lock device 14 connected to the second arm 15 can be operated only by operating the connecting means 16. Is locked off, the second back member 9 is folded to the front side FR, and the back surface of the second back member 9 is a table.

  Since the second back member 9 is supported at such a high position that the second back member 9 does not touch the seat cushion 2, the seat cushion 2 can be made thick enough to be comfortable to sit on.

  The first connecting pin 17 of the first arm 12 connected to the connecting means 16 via the first connecting pin 17 and the second connecting of the second arm 15 connected to the connecting means 16 via the second connecting pin 20. Since the long hole 19 along the straight line 18 connecting to the pin 20 is formed in the connecting means 16, the lock-off does not work when the second connecting pin 20 is moving in the long hole 19, which is inadvertent. The second back member 9 does not fall into the front side FR at the position.

  Further, when the second back member 9 is rotated to the original neutral position N in a state in which the second back member 9 is collapsed to the front side FR, the second connecting pin 20 of the second arm 15 is loosely moved into the long hole 19. Since the connecting means 16 moves upward by returning to the second position, the second back member 9 can return to the state along the first back member 7.

  In the above embodiment, the long hole 19 is described as being formed in the upper end portion of the connecting means 16. However, the present invention is not limited to this and may be the lower end portion of the connecting means 16. In addition, although the example in which the seat back 3 is rotated to the front side FR by the winding spring 29 of the reclining device 4 has been described as an example, the present invention is not limited to this and may be omitted. Further, although the description has been given by taking an automobile seat as an example of a vehicle seat, the seat is not limited to this, and may be a seat mounted on an aircraft, a railway vehicle, a vehicle, a ship, or the like. It has been described that the switch 32 for the occupant seated in the rear seat (not shown) is provided on the back of the seat back 3, but as shown in FIG. 11, the table member 6 is centered on the hinge. It may be rotatable. By rotating, the table portion, that is, the area where an object can be placed is enlarged, and the merchantability can be improved by approaching the front side.

The side view which shows that the vehicle seat which concerns on one Example of this invention exists in a full flat position. The side view which shows the reclining apparatus and folding rotation lock apparatus of FIG. Action | operation explanatory drawing of the reclining apparatus and folding rotation lock apparatus of FIG. The side view which shows that the vehicle seat of FIG. 1 exists in a neutral position. The perspective view shown from the diagonal back side of FIG. The side view which shows the reclining apparatus and folding rotation lock apparatus of FIG. Operation | movement explanatory drawing of the reclining apparatus of FIG. 4 and a folding rotation lock apparatus. The side view which shows that the vehicle seat of FIG. 1 exists in a forward position. The side view which shows the reclining apparatus and folding rotation lock apparatus of FIG. Action explanatory drawing of the reclining apparatus and folding rotation lock apparatus of FIG. The perspective view which looked at FIG. 8 from the upper side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat 2 Seat cushion 3 Seat back 4 Reclining device 7 1st back member 7a Lower end part of 1st back member 7b Upper end part of 1st back member 8 Folding rotation locking device 9 2nd back member 9a Lower end part of 2nd back member 9b Upper end portion of second back member 10 Reclining hinge 11 Reclining lock device 12 First arm 13 Table hinge 14 Table lock device 15 Second arm 16 Connecting means 16a Lower end portion of connecting means 16b Upper end portion of connecting means 17 Connecting portion First connecting pin 18 Straight line 19 Long hole 20 Second connecting pin which is another connecting portion 23 Third arm 24 Rotating plate 29 Winding spring N, Na Neutral position T Folding position FR Front side RR Rear side UP Upper side DW Lower side

Claims (3)

A seat back is pivotally supported so as to be able to rotate back and forth from a neutral position erected by a reclining device, and the seat back is a first back member whose lower end is pivotally supported so as to be able to rotate back and forth by the reclining device. If, upright position and a collapsed position on the seat cushion substantially along an extension of said first back member by folding the rotation lock device with respect to the site to be the upper end in the neutral position where the first back member erected In the vehicle seat composed of a second back member that is pivotally supported at the lower end so that it can be rotated back and forth between the two positions.
According to an operation of the reclining device, the the first back member reaches a predetermined rotational angle, so that the folded rotational locking device is unlocked by the second back member of the folding operation is possible on the seat cushion configured to,
The reclining device enables a reclining hinge that rotatably supports a lower end portion of the first back member, a lock position that prevents rotation of the first back member, and rotation of the first back member. A reclining lock device that can be controlled to any one of the lock-off positions, and a first arm that can be operated to lock off the reclining lock device by operating means,
The folding rotation lock device is capable of rotating a table hinge that rotatably supports a lower end portion of the second back member, a lock position for preventing rotation of the second back member, and rotation of the second back member. A table lock device that can be controlled at any one of the lock-off positions, and a second arm that can be operated to lock off the table lock device.
The table lock device is interposed between the first arm of the reclining device and the second arm of the folding rotation lock device via the second arm when the first back member reaches a predetermined rotation angle. The connecting means that can operate the lock-off is connected,
A length along a straight line connecting the connecting portion of the first arm connected to the connecting means via a connecting portion and the other connecting portion of the second arm connected to the connecting means via another connecting portion. A vehicle seat characterized in that a hole is formed in the connecting means . The vehicle seat according to claim 1,
The reclining device enables a reclining hinge that rotatably supports a lower end portion of the first back member, a lock position that prevents rotation of the first back member, and rotation of the first back member. A reclining lock device that can be controlled to a lock-off position, and a first arm that can be operated to lock off the reclining lock device by operating means;
The folding rotation lock device is capable of rotating a table hinge that rotatably supports a lower end portion of the second back member, a lock position for preventing rotation of the second back member, and rotation of the second back member. A table lock device that can be controlled at any one of the lock-off positions, and a second arm that can be operated to lock off the table lock device.
Between the first arm of the reclining device and the second arm of the folding rotation lock device, the table lock device is locked via the second arm when the first back member reaches a predetermined rotation angle. A vehicle seat characterized in that connecting means capable of turning off is connected. The vehicle seat according to claim 2,
There is a long hole along a straight line connecting the connecting portion of the first arm connected to the connecting means via a connecting portion and the other connecting portion of the second arm connected to the connecting means via another connecting portion. A vehicle seat formed on the connecting means.

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