JP2012218674A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat capable of improving the getting-on/off performance of an occupant on a backseat.SOLUTION: The vehicle seat enables a seat back 3 to be reclined forward for a shift to a walk-in mode that enables the loading/unloading of the occupant on the backseat, from a normal mode that enables the occupant to seat himself/herself. In the walk-in mode, the seat back 3 assumes a folded-down attitude in which the seat back almost overlaps a seat cushion 2.

Description

  The present invention relates to a vehicle seat.

  2. Description of the Related Art Conventionally, a vehicle seat that can be moved forward from a normal mode in which an occupant can be seated to a walk-in mode in which an occupant in a rear seat can get on and off is already known. Here, Patent Document 1 below discloses a vehicle seat in which the seat back is inclined forward with respect to the seat cushion in the walk-in mode. Thereby, the passengers of the rear seat can get on and off.

JP 2009-6931 A

  However, in the technique of Patent Document 1 described above, for example, when the occupant of the rear seat is large, the passenger of the rear seat getting on and off interferes with the seat back only by tilting the seat back forward. There was a thing.

  The present invention is intended to solve such a problem, and an object of the present invention is to provide a vehicle seat that can further enhance the passengers' ability to get on and off the rear seat.

The present invention is for achieving the above object, and is configured as follows.
The invention according to claim 1 is a vehicle seat in which a seat back can be moved forward from a normal mode in which an occupant can be seated to a walk-in mode in which an occupant in the rear seat can get on and off. This is a configuration characterized in that the posture is substantially overlaid with respect to the seat cushion.
According to this configuration, even when the physique of the occupant of the rear seat is large, it is possible to make it difficult for the occupant of the rear seat to get on and off and the seat back to interfere with each other. Therefore, it is possible to further enhance the boarding / exiting ability of the passenger in the rear seat.

The invention according to claim 2 is the vehicle seat according to claim 1, wherein a walk-in mode in which the seat slide is unlocked and a large-turn mode in which the seat slide is locked are selected. It is the structure characterized by being configured.
According to this configuration, the walk-in mode and the large-defeat mode can be selected according to the purpose of use of the occupant.

The invention according to claim 3 is the vehicle seat according to claim 2, wherein the first switching means, the second switching means, the slide lock mechanism, the recliner, and the first cable operation are provided. A link, a second cable operation link, a recoil release operation plate, and a slide release link. In the walk-in mode, the first switching means is operated to operate the first cable operation link and the first cable operation link. 2, the rick release operation plate is also rotated by the rotated first cable operation link, and the recliner is switched from the locked state to the unlocked state by the rotation of the rick release operation plate, The slide release link is rotated when the seatback is tilted forward by this switching, and the slide release link is rotated by the rotated slide release link. The lock mechanism is switched from the locked state to the unlocked state. In the large-turn mode, the second switching means is operated to rotate the rick release operation plate, and the rotation of the rick release operation plate causes the recliner to move. The configuration is characterized in that the slide lock mechanism remains in the locked state even when the seat back is tilted forward by switching from the locked state to the unlocked state.
This configuration can be implemented with a simple configuration.

FIG. 1 is a perspective view of a frame inside a passenger seat according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the passenger seat recliner of FIG. FIG. 3 is a schematic diagram showing movement of the passenger seat in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a schematic side view of the main part of the passenger seat in FIG. 1 and shows a state of the normal posture before switching to the walk-in posture. FIG. 6 shows a state in which the walk-in lever for switching to the walk-in posture is operated. FIG. 7 shows a state in the middle of switching the walk-in posture. FIG. 8 shows a state where the change of the walk-in posture is completed. FIG. 9 is a schematic side view of the passenger seat in FIG. 1 and shows a state of the normal posture before switching to the leaning posture. FIG. 10 shows a state in which the strap for switching the posture to the down position is operated. FIG. 11 shows a state in the middle of switching the posture of being overwhelmed. FIG. 12 shows a state in which the drastic posture switching is completed.

  Hereinafter, the form for implementing this invention is demonstrated using FIGS. In the following description, “passenger seat 1 having a rear seat (not shown)” will be described as an example of “vehicle seat”. In the following description, the terms “up”, “down”, “front”, “back”, “left”, and “right” refer to the directions of “up”, “down”, “front”, “back”, “left”, and “right” described in the above-described drawings. The direction of up, down, front, back, left and right is shown.

  First, with reference to FIGS. 1-5, schematic structure of the passenger seat 1 which concerns on the Example of this invention is demonstrated. As shown in FIG. 1, the passenger seat 1 mainly includes a seat cushion 2 (only a part of the cushion frame 10 is shown in FIG. 1) and a seat back 3 (only the back frame 20 in FIG. 1). Are shown). The seat back 3 is assembled to the seat cushion 2 via recliners 4 and 5 that form a pair on the left and right.

  By being assembled via the left and right recliners 4 and 5 in this way, the normal mode (the seat back 3 is in a tilted posture so that an occupant can be seated, FIG. 3 (A), FIG. 3 (F)), the inclination angle of the seat back 3 with respect to the seat cushion 2 can be arbitrarily adjusted.

  Further, by being assembled via the left and right recliners 4 and 5 in this way, the seat back 3 substantially overlaps the seat cushion 2 so that a passenger in the rear seat can get on and off from the normal mode. The seat back 3 is in a seat cushion as in the walk-in mode so that it can be used as a posture for placing the load on the back of the seat back 3 (the state shown in FIG. 3D). 2 can be switched to the state shown in FIG. 3I).

  Hereinafter, the seat cushion 2, the seat back 3, and the left recliner 4 will be described individually. Since the right recliner 5 is the same as the left recliner 4, detailed description thereof will be omitted.

  First, the seat cushion 2 will be described. The seat cushion 2 mainly includes a cushion frame 10, a cushion pad (not shown) that wraps the cushion frame 10, and a skin (not shown) that covers the surface of the cushion pad.

  The cushion frame 10 includes a left side frame 12 having a lower arm 12a, a right side frame 14 having a lower arm 14a, a front rod (not shown) that bridges the front ends of the side frames 12, 14, and both The rear rod 18 that bridges the rear ends of the side frames 12 and 14 is formed in a substantially rectangular frame shape.

  As shown in FIGS. 4 to 5, a bracket 66 in which a first cut-over piece 66 a and a second cut-over piece 66 b are formed is fastened to the outer surface of the left side frame 12. A ratchet 40 of the left recliner 4 described later is fastened to the inner surface of the left lower arm 12a. The same applies to the right lower arm 14a.

  A first stopper 12a1 and a second stopper 12a2 are formed on the outer periphery of the left lower arm 12a. The first stopper 12a1 and the second stopper 12a2 can contact a positioning spacer 56 of a hinge pin 54 described later. Thereby, it can control that seat back 3 falls forward too much or falls backward. The same applies to the right lower arm 14a. The seat cushion 2 is configured in this way.

  A slide release link 60 is pivotally attached to the outer surface of the left lower arm 12a via a hinge pin 4a of the left recliner 4 described later. A first operation cable 80 is hung between one end of the slide release link 60 and a slide lock mechanism (not shown) described later. The first operation cable 80 has a double structure composed of an outer cable 80a formed in a cylindrical shape and an inner cable 80b inserted inside the outer cable 80a.

  One end of the outer cable 80a in the first operation cable 80 is hooked on the first cut-over piece 66a of the bracket 66 described above, and the other end is in the vicinity of a slide lock mechanism (not shown) described later. It is hooked on a cut-off piece (not shown) of a bracket (not shown) provided on the head. On the other hand, one end of the inner cable 80b in the first operation cable 80 is hooked on one end of the above-described slide release link 60, and the other end is a hook (not shown) of the above-described slide lock mechanism (not shown). It is hung on.

  Further, a hook 60a capable of hooking a pin 52b of a second cable operation link 52 described later is formed at the other end of the slide release link 60. Note that, in the normal mode, the slide release link 60 has its one end pressed against the above-described second cut-off piece 66b of the bracket 66 (in FIG. 5, the slide release link 60 is rotated in the clockwise direction (arrow A torsion spring 68 is stretched between itself 60 and the second cut-over piece 66b of the bracket 66 described above so as to be biased in the A direction).

  The seat cushion 2 configured in this manner is assembled to a floor floor (not shown) via a known slide mechanism (not shown). Thereby, the passenger seat 1 can be slid back and forth. Further, a known slide lock mechanism (not shown) capable of locking the slide of the seat cushion 2 is assembled to the slide mechanism (not shown). Thereby, the slide position of the passenger seat 1 can be adjusted arbitrarily. The seat cushion 2 is configured in this way.

  Next, returning to FIG. 1, the seat back 3 will be described. The seat back 3 also mainly includes a back frame 20, a back pad (not shown) that wraps the back frame 20, and a skin (not shown) that covers the surface of the back pad.

  The back frame 20 is also formed in a substantially U-shape from a left side frame 22, a right side frame 24, and an upper frame 26 that bridges the upper ends of both the side frames 22, 24.

  A walk-in lever 82 is pivotally attached to the left side of the upper frame 26 (the portion corresponding to the left shoulder of the back frame 20). A bracket 28 having a cut-out piece 28a is fastened to the left side of the upper frame 26. On the other hand, a bracket 62 in which a first cut-over piece 62a and a second cut-over piece 62b are formed is also fastened to the lower side of the left side frame 22.

  As shown in FIGS. 4 to 5, a first cable operation link 50 is pivotally attached to the lower surface of the left side frame 22 on the inner surface side, and a second cable operation link 52 is pivotally attached to the outer surface side thereof. Yes. Specifically, both the cable operation links 50 and 52 are pivotally attached to the lower side of the left side frame 22 so as to be integrated with each other via a hinge pin 54.

  A second operation cable 84 is hung between one end of the first cable operation link 50 and the walk-in lever 82 described above. Similar to the first operation cable 80 described above, the second operation cable 84 has a double structure composed of an outer cable 84a formed in a cylindrical shape and an inner cable 84b inserted inside the outer cable 84a. It has become.

  One end of the outer cable 84a in the second operation cable 84 is also hooked on the cut-over piece 28a of the bracket 28 described above, and the other end is also hooked on the first cut-over piece 62a of the bracket 62 described above. It is fastened. On the other hand, one end of the inner cable 84b in the second operation cable 84 is also hooked on the walk-in lever 82 described above, and the other end is also hooked on one end of the first cable operation link 50 described above. .

  In addition, a pin 50b is formed at the other end of the first cable operation link 50. The pin 50b is movable within a long hole 58a and a short hole 58b of a recoil release operation plate 58 described later. Note that, in the normal mode, the one end side of the first cable operation link 50 is pressed against the second cut-over piece 62b of the bracket 62 described above (in FIG. 5, the first cable operation link 50). The tension spring 64 is stretched between itself 50 and the first cut-over piece 62a of the bracket 62 described above (so that is biased counterclockwise (arrow B direction)).

  On the other hand, the other end of the second cable operation link 52 is also formed with a pin 52b capable of pressing a slide release link 60 described later.

  Further, on the inner side of the left side frame 22, a rick releasing operation plate 58 is provided so as to be fastened to the hinge pin 4 a of the left recliner 4. The recoil release operation plate 58 is formed with a long hole 58a along the substantially circumferential direction and a short hole 58b along the substantially radial direction so as to communicate with one end of the long hole 58a. As described above, the pins 50b of the first cable operation link 50 are movable inside these holes 58a and 58b.

  In addition, a downside lever 72 having a strap 70 on the outer surface side thereof is pivotally attached to the lower side of the left side frame 22 via a transmission rod 74. The transmission rod 74 is configured to pass over the left and right side frames 22, 24. When the occupant operates the strap 70, the wire rod 74 is switched so that the left and right recliners 4, 5 are switched from the locked state to the unlocked state. The rick transmission rod 6 is pivotally attached via the lick release operation link 78 and the rick releasing operation link 78. The seat back 3 is configured in this way.

  Finally, the left recliner 4 will be described. As shown in FIG. 2, the recliner 4 is mainly composed of a guide 30 and a ratchet 40 that are relatively rotatably assembled by a housing 42. The outer surface of the guide 30 is fastened to the outer surface of the left side frame, and the outer surface of the ratchet 40 is fastened to the inner surface of the lower arm 12a.

  Inside the guide 30 are a hinge cam 32 that engages with the hinge pin 4 a of the recliner 4, a slide cam 34 that slides as the hinge cam 32 rotates, and a pair of poles that slide as the slide cam 34 slides 36, 36.

  Both the poles 36 are formed with engagement teeth 36 a that can be engaged with an engagement zone 40 a formed on the inner peripheral surface of the ratchet 40. The hinge cam 32 is always urged by a spiral spring 38 so that both poles 36 are urged outward. Thereby, the recliner 4 can be always locked (state in which relative rotation between the guide 30 and the ratchet 40 is restricted).

  As is clear from FIG. 2, a pair of free zones 40 b and 40 b are formed on the inner peripheral surface of the ratchet 40. The free zone 40b is formed so as to rise from the engagement zone 40a toward the center of the ratchet 40. Therefore, the left recliner 4 is in a state in which the rotation of the hinge cam 32 is restricted with respect to the guide 30 when the engaging teeth 36a of the pole 36 reach the free zone 40b as the seat back 3 tilts forward. It is configured.

  When the engagement teeth 36a of the pole 36 pass the free zone 40b as the seatback 3 further tilts forward, the engagement teeth 36a of the pole 36 and the engagement zone 40a of the ratchet 40 are re-engaged. It will be. In addition, the hinge pins 4 a and 5 a (not shown) of the left and right recliners 4 and 5 are fastened via a recoil transmission rod 6. Thereby, the states (locked state or unlocked state) of the left and right recliners 4 and 5 can be synchronized. The left recliner 4 is configured in this way.

  And the passenger seat 1 is comprised from the seat cushion 2 mentioned above and the seat back 3 mentioned above, and the seat back 3 is assembled | attached with respect to the seat cushion 2 via these left and right recliners 4 and 5. FIG. Yes. At this time, the seat back 3 is assembled to the seat cushion 2 through not only the left and right recliners 4 and 5 described above but also a spiral spring (not shown).

  As a result, the seat back 3 can always be urged in the forward tilting direction. Therefore, when the left and right recliners 4 and 5 are unlocked, the urging force of the spiral spring (not shown) is used to make the seat back 3 Can be switched from the normal mode to the walk-in mode or the normal mode.

  Next, the operation of the passenger seat 1 having the above-described configuration will be described. In this description, the description of the operation for switching from the normal mode to the walk-in mode and the operation for switching from the normal mode to the large-scale mode are performed separately. In any of the descriptions, in the normal mode, the slide lock mechanism is locked.

  First, the operation for switching from the normal mode to the walk-in mode will be described with reference to FIG. 3 and FIGS. First, when the walk-in lever 82 is operated from the state shown in FIGS. 3A and 5 (the state shown in FIG. 3B), the inner cable 84b of the second operation cable 84 is pulled. Thereby, the first cable operation link 50 and the second cable operation link 52 rotate around the axis of the hinge pin 54 against the urging force of the tension spring 64 (see FIG. 6).

  When the first cable operation link 50 rotates in this way, the pin 50b presses against the inner surface of the short hole 58b of the recline release operation plate 58, so that the recline release operation plate 58 is rotated. Can do. Thereby, since the hinge pin 4a of the left recliner 4 also rotates, the left recliner 4 is switched from the locked state to the unlocked state.

  Further, when the second cable operation link 52 rotates in this manner, the pin 52b approaches a position where the pin 52b can contact the slide release link 60. When the hinge pin 4a of the left recliner 4 is rotated, the hinge pin 5a (not shown) of the right recliner 5 is also rotated via the rick transmission rod 6, so that the right recliner 5 is also switched from the locked state to the unlocked state.

  As described above, when the left and right recliners 4 and 5 are switched from the locked state to the unlocked state, the seat back 3 is tilted forward by the urging force of the spiral spring (not shown) as described above (see FIG. 7). . That is, in the left and right recliners 4 and 5, both guides 30 and 30 rotate with respect to the both ratchets 40 and 40.

  When the engaging teeth 36a of the poles 36 of the left and right recliners 4 and 5 reach the free zones 40b by this rotation, the rotation of the hinge cams 32 is restricted with respect to the guides 30 as described above. It is in the state.

  As a result, the rick release operation plate 58 fastened to the left hinge pin 4a engaged with the hinge cam 32 is also in a state where its rotation is restricted with respect to the left side frame 22. Even if the pin 50 b of the first cable operation link 50 that has entered the short hole 58 b of the 58 attempts to return by the restoring force of the tension spring 64, this return can be prevented.

  Therefore, the left and right recliners 4 and 5 can be held in the unlocked state. If the return can be prevented in this way, as a result, the pin 52b of the second cable operation link 52 can be held close to a position where it can come into contact with the slide release link 60.

  Further, when the seat back 3 is tilted forward, the pin 52b of the second cable operation link 52 starts to press the slide release link 60. As a result, the slide release link 60 rotates around the axis of the hinge pin 4a of the left recliner 4 against the biasing force of the torsion spring 68. At this time, since the pressed pin 52b is hooked on the hook 60a of the slide release link 60, it is possible to prevent the pin 52b from being pressed and dropped.

  As the slide release link 60 rotates in this way, the inner cable 80b of the first operation cable 80 is pulled, so that the slide lock mechanism (not shown) can be switched from the locked state to the unlocked state. Note that the forward tilt of the seat back 3 is performed until the seat back 3 is in a largely tilted posture in which the seat back 3 substantially overlaps the seat cushion 2 (see FIGS. 3C and 8).

  In this greatly tilted posture, the slide release link 60 remains rotated, so that the pull of the inner cable 80b of the first operation cable 80 is also held, and the lock release state of the slide lock mechanism (not shown) is also held. The Rukoto. Therefore, the passenger seat 1 can be slid forward in this greatly tilted posture (see FIG. 3D).

  Even in this greatly tilted posture, as described above, the recoil release operation plate 58 is also in a state where its rotation is restricted with respect to the left side frame 22, so that the left and right recliners 4, 5 The left and right recliners 4 and 5 can be held in the unlocked state even when the engaging teeth 36a of the pole 36 have reached the engaging zone 40a of the ratchet 40 again.

  In this way, the passenger seat 1 can be switched from the normal mode to the walk-in mode. In this walk-in mode, as described above, the slide lock mechanism (not shown) is in the unlocked state, and the left and right recliners 4 and 5 are also in the unlocked state. In addition, in order to return the passenger seat 1 switched to the walk-in mode to the normal mode, the seat back 3 may be raised (see FIG. 3E).

  Next, with reference to FIG. 3 and FIGS. 9 to 12, an operation for switching from the normal mode to the large-scale mode will be described. First, when the strap 70 is operated from the state shown in FIGS. 3 (F) and 9 (the state shown in FIG. 3 (G)), the large-down lever 72 is raised. As a result, the transmission rod 74 rotates, and the wire 76 is also caused by this rotation.

  When the wire is raised in this way, the rick release operation link 78 is also caused, so that the rick transmission rod 6 can be rotated (see FIG. 10). As a result, the hinge pins 4a and 5a (not shown) of the left and right recliners 4 and 5 are also rotated, so that the left and right recliners 4 and 5 are switched from the locked state to the unlocked state. At this time, while the pin 50b of the first cable operation link 50 is shaped to move inside the elongated hole 58a of the rick release operation plate 58, the rick release operation plate 58 is also rotating.

  When the left and right recliners 4 and 5 are switched from the locked state to the unlocked state in this way, the seat back 3 is tilted forward by the urging force of the spiral spring (not shown) as described above (see FIG. 11). .

  Further, when the seat back 3 is tilted forward, the pin 52b of the second cable operation link 52 abuts against the slide release link 60, unlike the description of the operation for switching from the normal mode to the walk-in mode. Since the state is not close to a possible position, the pin 52b of the second cable operation link 52 does not press the slide release link 60. As a result, the slide lock mechanism remains in the locked state.

  Note that the seatback 3 is tilted forward until the seatback 3 is in a greatly tilted posture that substantially overlaps the seat cushion 2 (see FIGS. 3H and 12). In this greatly tilted posture, as described above, the engaging teeth 36a of the pole 36 and the engaging zone 40a of the ratchet 40 are reengaged in the left and right recliners 4, 5, so 5 can be returned to the locked state.

  In this way, it is possible to switch the passenger seat 1 from the normal mode to the large-scale mode. In this large fall mode, as described above, the slide lock mechanism (not shown) is in the locked state, and the left and right recliners 4 and 5 are also in the locked state. In order to return the passenger seat 1 switched to the large-turn mode to the normal mode, the left and right recliners 4 and 5 by the operation of the strap 70 may be unlocked and the seat back 3 may be raised.

  The passenger seat 1 according to the embodiment of the present invention is configured as described above. According to this configuration, in the walk-in mode, the seat back 3 is in a greatly tilted posture that substantially overlaps the seat cushion 2. Therefore, even when the size of the occupant of the rear seat is large, it is possible to make it difficult for the occupant of the rear seat to get on and off and the seat back 3 to interfere. Therefore, it is possible to further enhance the boarding / exiting ability of the passenger in the rear seat.

Further, according to this configuration, the walk-in mode in which the seat slide is unlocked,
It is possible to select a large-defeat mode in which the seat slide is locked.
Therefore, the walk-in mode or the large-defeat mode can be selected according to the purpose of use of the occupant.

According to this configuration, in the walk-in mode, the first cable operation link 50 and the second cable operation link 52 are rotated by operating the walk-in lever 82, and the rotated first The recline release operation plate 58 is also rotated by the cable operation link 50, and the recliners 4 and 5 are switched from the locked state to the unlocked state by the rotation of the recline release operation plate 58. The slide release link 60 is rotated, and the slide release mechanism 60 is used to switch the slide lock mechanism from the locked state to the unlocked state. In the large-turn mode, the strap 70 is operated to perform the rick release operation. Rotate the plate 58 to rotate the recoil release operation plate 58. It, switched to the unlocked state of the recliner 4, 5 from the locked state, the seat back 3 by this switching be falling forward, and leave the slide lock mechanism of the lock state.
Therefore, it can be implemented with a simple configuration.

The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In the embodiment, as an example of “vehicle seat”, “passenger seat 1 in which a rear seat exists” has been described as an example. However, the present invention is not limited to this, and may be, for example, “driver's seat where a rear seat is present” or “second row seat where a third row seat is present”.

1 Passenger seat (vehicle seat)
2 Seat cushion 3 Seat back

Claims (3)

A vehicle seat capable of moving a seat back forward from a normal mode in which an occupant can be seated to a walk-in mode in which an occupant in the rear seat can get on and off,
In the walk-in mode, a vehicular seat characterized in that the seat back is in an overlying posture that substantially overlaps the seat cushion. The vehicle seat according to claim 1,
Walk-in mode with seat slide unlocked,
A vehicular seat characterized by being configured to be able to select a large-down mode in which the seat slide is locked. The vehicle seat according to claim 2,
A first switching means, a second switching means, a slide lock mechanism, a recliner, a first cable operation link, a second cable operation link, a recline release operation plate, and a slide release link; And
In the walk-in mode, the first switching means is operated to rotate the first cable operation link and the second cable operation link, and the rect release operation plate is rotated by the rotated first cable operation link. The recliner is switched from the locked state to the unlocked state by the rotation of the recoil release operation plate, the slide release link is rotated by the forward tilt of the seatback by this switching, and the rotated slide release link The slide lock mechanism is switched from the locked state to the unlocked state.
In the large fall mode, the second switching means is operated to rotate the recoil release operation plate, and the rotation of the recoil release operation plate switches the recliner from the locked state to the unlocked state. A vehicle seat characterized in that the slide lock mechanism remains in a locked state even if it is tilted forward.

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