JP5779381B2 - Vehicle seat - Google Patents

Description

  The present invention provides a vehicle having a seating portion on which an occupant sits, a support portion that supports the occupant from the back side, a flip-up mechanism that raises the seating portion, and an urging member that urges the support portion to tilt forward. Engaging with the engaging portion engaged with the supporting portion to keep the supporting portion in an upright state against the urging force of the urging member, and the jumping operation by the jumping mechanism The present invention relates to a vehicle seat that further includes a release mechanism that releases the engagement between the portion and the support portion.

  2. Description of the Related Art A vehicle seat that has a seat portion on which an occupant sits and a support portion that supports the occupant from the back side and can be stored in a folded state is already known. Some of such vehicle seats have a biasing member that biases a predetermined portion of the seat in the process of folding the seat (see, for example, Patent Document 1).

As an example of the above-described urging member, an urging member that urges the support portion so as to be tilted forward can be considered. In a vehicle seat having such an urging member, for example, a flip-up mechanism that flips up the seating portion, and an engagement that engages with the support portion to maintain the support portion in an upright state against the urging force of the urging member. When the engagement portion is further provided, when the engagement between the engagement portion and the support portion is released, the support portion falls forward due to the urging force of the urging member.
It should be noted that the disengagement between the engaging portion and the support portion may be performed in conjunction with the above-described raising operation of the seating portion by the raising mechanism, in other words, using the raising operation. When the engagement between the engaging portion and the support portion is released, the urging force of the urging member acts on the support portion.

JP 2009-292266 A

  By the way, after the engagement between the engagement portion and the support portion is released, the released state is maintained so that the support portion smoothly falls forward by the urging force of the urging member. There is a need. On the other hand, for example, when the engagement between the engagement portion and the support portion is erroneously released, it is desirable that the engagement portion and the support portion can be returned to a state where they can be engaged again. In other words, from the viewpoint of improving the operability of the vehicle seat, when the vehicle seat is stored, the engagement between the engagement portion and the support portion is released so that the support portion falls forward, and further the support portion. Even in the middle of falling, it is required to return to a state in which the engaging portion and the supporting portion can be engaged again.

  Accordingly, an object of the present invention has been made in view of the above-described problems, and it is possible to appropriately release the engagement between the engagement portion and the support portion and the re-engagement between the engagement portion and the support portion. And providing a vehicle seat excellent in operability.

According to the vehicle seat of the present invention, the subject is a seat part on which an occupant is seated, a support part that supports the occupant from the back side, a flip-up mechanism that raises the seat part, and the support part is tilted forward. An urging member that urges the urging member, an engaging portion that engages with the urging member to maintain the urging member in an upright state against the urging force of the urging member, and a spring by the flip-up mechanism A release mechanism that releases the engagement between the engagement portion and the support portion using a lifting operation, and the support portion in a state in which the engagement with the engagement portion is released by the release mechanism, A return mechanism that performs a return operation for returning to a state in which the engagement portion can be engaged with the engagement portion. The return mechanism releases the engagement between the engagement portion and the support portion, and The return operation is performed according to the tilt angle of the support portion that has fallen forward due to the biasing force of the member. It is more resolved.
According to such a configuration, after the engagement between the engagement portion and the support portion is released, for example, when the tilt angle of the support portion that has fallen forward reaches a predetermined angle, the engagement portion and the support portion Return to a state where they can be engaged again. As a result, even if the engagement between the engagement portion and the support portion is erroneously released and the support portion falls forward, the engagement portion and the support portion can be returned to a state where they can be engaged again. Therefore, a vehicle seat excellent in operability is provided.

Further, in the above vehicle seat, the engagement between the engagement portion and the support portion is released after the start of the flip-up operation, and the engagement between the engagement portion and the support portion is released, It is preferable that the return mechanism performs the return operation when the tilt angle reaches a preset angle after the support portion starts to fall forward by the biasing force of the biasing member.
According to such a configuration, there is a time difference between the release of the engagement between the engagement portion and the support portion and the execution of the return operation. For example, immediately after the engagement between the engagement portion and the support portion is released. Accordingly, it is possible to avoid the problem that the engagement between the engaging portion and the support portion should be released, but the release operation is not properly released.

In the above vehicle seat, the release mechanism includes a rotating body that rotates to release the engagement between the engaging portion and the support portion, and the rotating body is at one end position of the rotation range. When the rotating portion is rotated toward the other end position, the engagement between the engaging portion and the supporting portion is released, and when the rotating body returns to the one end position of the rotating range, the engaging portion and the supporting portion are released. When the tilt angle of the support portion reaches the set angle, the return mechanism determines the position of the rotating body in the rotation range as the return operation. It is preferable to perform an operation of returning to the one end position.
According to such a configuration, by controlling the position of the rotating body, the state where the engagement between the engagement portion and the support portion is released, and the state where the engagement portion and the support portion can be engaged again. Can be appropriately switched.

In the above vehicle seat, the release mechanism includes a first rotating member that rotates using the flip-up operation, a second rotating member as the rotating body, and the second rotating member. An engagement pin that engages with the second rotation member, and the return mechanism includes an urging spring that urges the second rotation member toward the one end position of the rotation range. When the first rotating member rotates with the engaging pin engaged with the engaging pin, the engaging pin resists the urging force of the urging spring using the rotation of the first rotating member. Then, the second rotating member is rotated from the one end position to the other end position of the rotation range, and the return mechanism is configured such that the tilt angle of the support portion reaches the set angle. As the return operation, the engagement state between the second rotation member and the engagement pin is released, and the biasing spring is released. It is preferable to perform the operation of returning the position of the second rotating member to the one end position of the rotation range by the force.
According to such a configuration, it is possible to control the position of the second rotation member by adjusting the mechanical configuration of the engagement state between the second rotation member as the rotation body and the engagement pin. A relatively simple configuration is realized as a configuration for switching between a state in which the engagement between the engagement portion and the support portion is released and a state in which the engagement portion and the support portion can be engaged again. Become.

Further, in the above vehicle seat, a through hole through which the engagement pin passes is formed in the second rotating member, and a portion of the second rotating member located at a peripheral edge of the through hole includes: A convex portion protruding toward the inside of the through hole is formed, and the engagement pin is engaged with the second rotating member by being locked to the convex portion so as to get over the convex portion. The engagement state with the second rotating member is released by moving in the through hole, and the return mechanism utilizes the tilting operation of the support portion forward, and the engagement pin is moved to the convex portion. A tension member that pulls the engagement pin so as to get over the engagement pin, and the tension member is arranged so that the engagement pin gets over the projection when the tilt angle of the support portion reaches the set angle. It is preferable to pull the mating pin.
According to such a configuration, the engagement state between the second rotating member and the engagement pin can be switched with a relatively simple configuration. In addition, by adjusting the shape of the convex portion, it is possible to adjust the time point when the engaging pin gets over the convex portion (that is, the time point when the engaging portion and the support portion can be engaged again).

Further, in the above vehicle seat, the shock absorbing rubber that collides with the second rotating member when the position of the second rotating member returns to the one end position of the rotating range by the urging force of the urging spring. It is preferable to further have a body.
According to such a configuration, it is possible to reduce the impact on the second rotating member when the second rotating member returns to one end position of the rotation range.

In the above vehicle seat, a rotation shaft that rotatably supports the first rotation member and the second rotation member, and the rotation shaft are attached, and the first rotation member and the A casing that covers the second rotating member, and the casing includes a slit formed along a rotating direction of the first rotating member, and the first rotating member includes the first rotation member. It is preferable that a protrusion is provided that moves in the slit along the rotation direction when the moving member rotates.
According to such a configuration, when the first rotating member rotates, the projection of the first rotating member moves along the slit formed in the casing. It becomes possible to rotate appropriately within the moving range.

According to the vehicle seat of the first aspect, even if the engagement between the engagement portion and the support portion is erroneously released and the support portion falls forward, the engagement portion and the support portion are Since it can return to the state which can be engaged again, the vehicle seat excellent in operativity will be provided.
According to the vehicle seat of the second aspect, the return operation is performed immediately after the engagement between the engagement portion and the support portion is released, and the engagement between the engagement portion and the support portion is originally released. Although it should have been, it is possible to avoid the problem of not being properly released.
According to the vehicle seat of the third aspect, the state in which the engagement between the engagement portion and the support portion is released by the rotation of the rotation body, and the engagement portion and the support portion can be engaged again. It is possible to appropriately switch to the state.
According to the vehicle seat of the fourth aspect, since the rotation operation of the second rotation member can be controlled with a relatively simple configuration, the engagement between the engagement portion and the support portion is prevented. It is possible to switch between the released state and the state where the engaging portion and the support portion can be engaged again.
According to the vehicle seat of the fifth aspect, the engagement state between the second rotating member and the engagement pin can be switched with a relatively simple configuration. In addition, by adjusting the shape of the convex portion, it is possible to adjust the time point when the engaging pin gets over the convex portion (that is, the time point when the engaging portion and the support portion can be engaged again).
According to the vehicle seat of the sixth aspect, it is possible to reduce the impact on the second rotation member when the second rotation member returns to one end position of the rotation range.
According to the vehicle seat of the seventh aspect, the first rotation member can be appropriately rotated within the set rotation range.

It is a side surface schematic diagram of the vehicle rear part carrying vehicle seat S1. It is a perspective view of vehicle seat S1. 2 is a perspective view of a cushion frame 11. FIG. FIG. 2 is a perspective view (FIG. 1) of a seat cushion flip-up mechanism 60. It is a figure when the seat back frame 21 is seen from the front side. FIG. 3 is a diagram showing an internal frame 31 of the headrest 30. It is a figure when the headrest rotation mechanism 50 is seen from the front side. It is a figure when the headrest rotation mechanism 50 is seen from the rear side. 3 is a perspective view of a headrest rotation mechanism 50. FIG. It is a perspective view (Drawing 2) of seat cushion flip-up mechanism 60. It is a figure when the seat cushion flip-up mechanism 60 is viewed from above. It is a figure when the seat back support unit 90 is seen from the side. 7 is a perspective view of a lock mechanism 72 and an operation unit 77. FIG. It is a figure when the arrangement unit 80 is seen from the back side. It is a figure which shows the operation example of the arrangement unit 80 (the 1). It is a figure which shows the operation example of the arrangement unit 80 (the 2). FIG. 9 is a diagram showing an operation example of the arrangement unit 80 (No. 3). It is a figure which shows the operation example of the arrangement unit 80 (the 4). It is explanatory drawing of the routing space AS.

Hereinafter, an embodiment according to the present invention (hereinafter, this embodiment) will be described with reference to FIGS.
FIGS. 1 to 16 illustrate a vehicle seat (hereinafter, vehicle seat S1) according to the present embodiment. FIG. 1 is a schematic side view of the rear portion of the vehicle on which the vehicle seat S1 is mounted. FIG. 2 is a perspective view of the vehicle seat S1. FIG. 3 is a perspective view of the cushion frame 11. FIG. 4 is a perspective view (FIG. 1) of the seat cushion flip-up mechanism 60. FIG. 5 is a view when the seatback frame 21 is viewed from the front side. FIG. 6 is a view showing the inner frame 31 of the headrest 30. 7 to 9 are views showing the headrest rotating mechanism 50, FIG. 7 is a view when the headrest rotating mechanism 50 is viewed from the front side, and FIG. 8 is a view when viewed from the rear side. FIG. 9 is a perspective view. FIG. 10 is a perspective view (FIG. 2) of the seat cushion flip-up mechanism 60. FIG. 11 is a view of the seat cushion flip-up mechanism 60 as viewed from above. 12 and 13 are explanatory views of the seat back overturning mechanism 70, FIG. 12 is a view of the seat back support unit 90 when viewed from the side, and FIG. 13 shows the lock mechanism 72 and the operation unit. 77 is a perspective view of 77. FIG. FIG. 14 is a view of the arrangement unit 80 as viewed from the back side. 15A to 15D are diagrams illustrating an operation example of the arrange unit 80. FIG. 16 is an explanatory diagram of the routing space AS.

  In the figure, symbol FR indicates the front of the vehicle, symbol RR indicates the rear of the vehicle, and symbol UP indicates the upper side of the vehicle. In the following description, the left-right direction means the left-right direction in a state of facing the front of the vehicle, and is a direction that coincides with the width direction of the seat back frame 21 described later.

  The vehicle seat S1 is an example of a vehicle seat. As shown in FIG. 1, the vehicle seat S1 is mounted as a rear seat in a vehicle having a luggage space at the rear of a vehicle body. It is mounted on a wagon-type car.

The configuration of the vehicle seat S1 will be described. In this embodiment, the vehicle seat S1 is divided into a right side (driver's seat side) vehicle seat S11 and a left side (passenger side) vehicle seat S12. , S12 includes a seat cushion 10 as a seating portion on which an occupant sits, a seat back 20 as a support portion that supports the occupant from the back side, and a headrest 30 that supports the head of the occupant. Note that an armrest 40 is disposed between the seat backs 20 of the vehicle seats S11 and S12. In the left vehicle seat S12, the pedestal 20a and the seat back positioned below the armrest 40 in FIG. 20, and the overhanging portion 10 a and the seat cushion 10 disposed at a position below the pedestal portion 20 a in FIG. 2 are integrated.
Although the vehicle seat S11 on the right side and the vehicle seat S12 on the left side are different in the above points, the vehicle seats S11 and S12 are common in terms of the basic configuration. Therefore, in the following description, only the configuration of the right vehicle seat S11 will be described.

  The vehicle seat S1 is configured so that the luggage compartment portion 3 is formed when the vehicle seat S1 is not in use from a normal posture in which the occupant can be seated (the posture shown by a broken line in FIG. 1; hereinafter, a seated posture). It is possible to switch to the stored posture (the posture shown by a solid line in FIG. 1 and hereinafter referred to as the stored posture). More specifically, when the posture of the vehicle seat S1 is switched to the storage posture, the seat cushion 10 is flipped up toward the front of the vehicle. Further, in conjunction with the seat cushion 10 being flipped up, the seat back 20 is pivoted forward so that the seat cushion 10 is laid down on the vehicle body floor 2 at the position where the seat cushion 10 before the seat cushion 10 was placed. Furthermore, when the headrest 30 is rotated approximately 90 degrees forward from the state in which the headrest 30 is disposed substantially vertically above the seat back 20, and the seat back 20 falls on the vehicle body floor 2, the seat that jumps forward It is stored between the cushion 10 and the seat back 20 lying down.

  Through the series of operations described above, the vehicle seat S1 can be stored in a compact posture. And in the vehicle 1 which employ | adopts the vehicle seat S1 of the said structure as a rear seat, the luggage compartment part 3 which comprises a part of vehicle body floor 2 is formed in the back of the said vehicle seat S1, This luggage compartment part 3 is the following. The vehicle seat S1 is expanded until it can be used by the storing operation.

  As described above, the vehicle seat S1 is configured to be able to switch its posture between the sitting posture and the storage posture, and in this embodiment, the posture in which only the headrest 30 is tilted forward from the sitting posture. It is also possible to switch to a position where only the seat back 20 is raised from the stored position. Such various seat arrangements are realized by various drive mechanisms (specifically, a headrest rotation mechanism 50, a seat cushion jumping mechanism 60, a seatback overturning mechanism 70, etc., which will be described later) provided in the vehicle seat S1. Is. Hereinafter, a configuration for realizing the seat arrangement of the vehicle seat S1 will be described.

  In the following description, the seating positions of the seat cushion 10, the seat back 20, and the headrest 30 are the positions of the seat cushion 10, the seat back 20, and the headrest 30 when the vehicle seat S1 is in the seating position. It is. Further, the flip-up position of the seat cushion 10 is the position of the seat cushion 10 when the vehicle seat S1 is in the stowed position, and the tilted positions of the seat back 20 and the headrest 30 are respectively the vehicle seat. This is the position of the seat back 20 and the headrest 30 when the posture of S1 is the storage posture.

<< Basic configuration of vehicle seat S1 >>
In describing the configuration for realizing the seat arrangement of the vehicle seat S1, the basic configuration of the vehicle seat S1 will be described. As described above, the vehicle seat S1 includes the seat cushion 10, the seat back 20, and the headrest 30.

  The seat cushion 10 is configured by attaching a skin material to the cushion frame 11 shown in FIG. The skin material is attached by hooking a trim cord (not shown) sewn to the end of the skin material to the outer edge of the cushion frame 11.

Further, a seat cushion flip-up mechanism 60 shown in FIG. 4 is disposed below the seat cushion 10. The seat cushion flip-up mechanism 60 is fixed on the vehicle body floor 2 and supports the seat cushion 10 and raises the seat cushion 10 from the seating position toward the flip-up position when storing the vehicle seat S1. Is.
That is, the seat cushion 10 is configured to be fixed at a seating position on the vehicle body floor 2 via the seat cushion jumping mechanism 60, and when the seat cushion jumping mechanism 60 is operated, the seat cushion 10 jumps from the seating position toward the jumping position. Has been. In other words, the seat cushion 10 can reciprocate between the sitting position and the flip-up position.

  The seat cushion flip-up mechanism 60 includes a striker lock mechanism 100. The striker lock mechanism 100 fixes the seat cushion 10 at the seating position when the vehicle seat S1 is in the seating posture. The seat cushion flip-up mechanism 60 and the striker lock mechanism 100 will be described in detail later.

  The seat back 20 is configured by applying urethane as a cushioning material to the seat back frame 21 shown in FIG. 5 and covering it with a skin material. The seat back frame 21 of the seat back 20 includes a pan frame 22 that forms the base of the seat back frame 21 and a pipe frame 23 that forms the outer frame of the seat back frame 21. The pan frame 22 is formed by subjecting a substantially rectangular sheet metal to processing such as bead processing for ensuring rigidity. A headrest rotation mechanism 50 and an arrangement unit 80 which will be described later are attached to the front surface of the pan frame 22.

  The pipe frame 23 is located in front of the pan frame 22, is disposed along the outer edge of the pan frame 22 so as to surround the pan frame 22, and is joined to the pan frame 22 by welding. A portion of the pipe frame 23 that is positioned below the seat back 20 in the up-down direction and a portion that faces the outside of the vehicle 1 in the left-right direction are between the pan frame 22 in the thickness direction of the seat back 20. It is arranged in a state where a gap is provided. The reason why such a gap is formed is, for example, to sandwich and hold an end portion of urethane as a cushioning material applied to the seat back frame 21 between the pan frame 22 and the pipe frame 23.

  Further, a pillar falling restricting portion 25 made of a downward U-shaped bracket is provided in a portion of the upper end portion of the seat back frame 21 that is located on the rear side of a pillar 33 described later. The pillar fall restricting portion 25 corresponds to a restricting portion that restricts the backward rotation (falling) of the pillar 33 when the headrest 30 is located at the seating position. In addition, the pillar fall restriction | limiting part 25 is provided for every pillar 33 (namely, two pieces are provided), and is weld-stopped by the upper end part of the pipe frame 23. As shown in FIG.

  The seat back 20 having the above configuration is configured such that the pivot shaft 20b is fitted into a hole of a seat back support unit 90 (see, for example, FIG. 12) fixed to the vehicle body floor 2, so that the seat back support unit 90 Is rotatably supported. Accordingly, the seat back 20 can be rotated in the front-rear direction with respect to the vehicle body floor 2 and can be moved between the sitting position and the collapsed position (in other words, switching between the standing state and the lying down state). Is possible). In the present embodiment, the seat back 20 lies forward in conjunction with the flip-up operation of the seat cushion 10. Furthermore, in the present embodiment, it is possible to tilt only the seat back 20 forward.

  The headrest 30 is provided above the seat back 20 (in other words, the seat back frame 21), and is filled with a foaming agent between the inverted U-shaped inner frame 31 and the skin material shown in FIG. Composed. The leg portions 31a on both sides of the inverted U-shaped inner frame 31 are hollow, and spaces for accommodating the hollow bar-shaped guides 32 are formed inside the leg portions 31a. The guide 32 is accommodated in the leg portion 31a and is configured to be able to advance and retract through an insertion hole (not shown) provided in the lower end flange portion 31b of the leg portion 31a of the internal frame 31. The skin material of the headrest 30 is provided with a through hole (not shown) so that the end portion of the guide 32 is located outside the skin material.

  In the headrest 30 configured as described above, in a state where the guide 32 is located at the most retracted position in the leg portion 31a of the inner frame 31 (a state where the guide 32 is housed in the leg portion 31a except for the lower end flange 32a). Of the skin material of the headrest 30, the portion around the through hole is sandwiched between the lower end flange portion 31 b of the leg portion 31 a of the inner frame 31 and the lower end flange 32 a of the guide 32.

  In the present embodiment, the headrest 30 is supported by the pillar 33 in a state where a pair of pillars 33 (see FIG. 5) made of a metal rod is inserted into the guide 32, and each pillar 33 is further described below. The headrest rotating mechanism 50 is rotatably supported by the casing 51.

  The headrest 30 can be rotated by the headrest rotation mechanism 50 until the headrest 30 is tilted forward by about 90 degrees from the state of standing up above the seat back 20. In the present embodiment, the headrest 30 is pivoted so as to fall forward in conjunction with the flip-up operation of the seat cushion 10, and further, only the headrest 30 can be tilted forward alone. It is.

<< Headrest turning mechanism >>
Next, the headrest rotation mechanism 50 will be described.
The headrest rotating mechanism 50 is a mechanism that tilts the headrest 30 forward by rotating the pillar 33 forward. The headrest rotating mechanism 50 is fixed to the upper part of the front surface of the seat back frame 21 while being covered with a resin cover (not shown).

As shown in FIGS. 7 to 9, the headrest rotating mechanism 50 includes a casing 51, an urging spring 52, a lock member 53, and a slide member 54.
The casing 51 forms a casing of the headrest rotating mechanism 50, and is configured by overlapping a substantially rectangular metal plate in the present embodiment, and a lock member 53 and a slide member 54 are accommodated therein. . Moreover, the casing 51 supports the pillar 33 so that the pillar 33 can rotate. The urging spring 52 urges the pillar 33 forward, and is provided on the back surface (rear surface) side of the casing 51.

  The lock member 53 is a metal piece member that engages with the pillar 33 in order to keep the pillar 33 in an upright state against the urging force of the urging spring 52. Here, the standing state means the arrangement state of the pillar 33 when the headrest 30 stands and is positioned above the seat back 20 (in other words, the state where the headrest 30 is positioned at the seating position). .

  The configuration of the lock member 53 will be described in more detail. As shown in FIG. 9, the pillar 33 includes a vertical portion 33a extending along the height direction of the vehicle seat S1 (in other words, the vertical direction of the seat back frame 21). A horizontal portion 33b adjacent to the lower portion of the vertical portion 33a and extending in the left-right direction (in other words, the width direction of the seat back frame 21), and a substantially fan-shaped pillar-side engagement portion at the end of the horizontal portion 33b. 33c. The lock member 53 is engaged with the pillar 33 by being fitted into a notch 33d formed in the pillar side engaging portion 33c, and maintains the pillar 33 in an upright state.

  Further, the lock member 53 is supported in a swingable manner within the casing 51, and a position where a part of the lock member 53 is exposed outside the casing 51 and can be fitted into the notch 33 d of the pillar side engaging portion 33 c ( It moves between the engagement position) and the position (release position) where the exposed portion is accommodated in the casing 51 and removed from the notch 33d.

  The slide member 54 is a long body (specifically, a ratchet lever) housed in the casing 51, and slides along the width direction of the seat back frame 21 to swing the lock member 53. It is. The slide member 54 is normally in a position that brings the lock member 53 to the engaged position. Then, when the slide member 54 slides to one end side in the longitudinal direction, the lock member 53 is brought to the release position.

In the headrest rotating mechanism 50 configured as described above, the urging force of the urging spring 52 is resisted while the lock member 53 is engaged with the pillar-side engagement portion 33c of the pillar 33 at the engagement position. Thus, the pillar 33 is maintained in an upright state, whereby the headrest 30 is held at the seating position.
On the other hand, when the lock member 53 swings from the engagement position to the release position by the sliding movement of the slide member 54, the engagement between the lock member 53 and the pillar side engagement portion 33c is released, and the urging force of the urging spring 52 is released. The pillar 33 rotates forward, and the headrest 30 falls forward along with this. These series of operations are operations for causing the headrest 30 to fall forward.

  By the way, in this embodiment, two paths for applying a driving force for sliding the slide member 54 are prepared. One route is a route for accepting an operation performed by the occupant for tilting only the headrest 30 forward and transmitting the operation directly to the slide member 54 for sliding.

  Specifically, the vehicle seat S1 according to the present embodiment is provided with a belt-like member ST1 that receives an operation for sliding the slide member 54 by the occupant, and the belt-like member is provided at one longitudinal end 54a of the slide member 54. ST1 is fastened. Then, when the occupant pulls the belt-shaped member ST1, the slide member 54 slides, and the lock member 53 swings to the release position in such a manner as to follow the slide member 54.

  The band-shaped member ST1 is bent at a substantially right angle by abutting on a hooking rod 24 attached to the seat back frame 21 at a midway position in the extending range. That is, the hooking rod 24 corresponds to a bending member that abuts on the band-shaped member ST1 and bends the band-shaped member ST1.

  The belt-shaped member ST1 passes through a through hole provided in the skin material of the seat back 20 and protrudes from a portion of the upper end surface of the seat back 20 that is located outside the vehicle 1 relative to the headrest 30 ( (See FIG. 2). Thus, when the occupant performs an operation of pulling the strip member ST1 along the vertical direction, the moving direction of the strip member ST1 is converted from the vertical direction to the horizontal direction by the action of the hooking rod 24, and finally, This is transmitted to the slide member 54 as a driving force for sliding the slide member 54 along the width direction of the seat back frame 21. In this sense, the hanging rod 24 corresponds to a conversion unit for converting the pulling operation along the vertical direction of the band-shaped member ST1 into the sliding movement of the slide member 54 along the width direction of the seat back frame 21. Is.

  The other path for applying the driving force for sliding movement with respect to the slide member 54 receives an operation (hereinafter also referred to as a storage operation) for the occupant to store the vehicle seat S1, and the storage operation is performed on the seat. This is transmitted to the slide member 54 through the raising operation of the cushion 10. That is, in this path, when the vehicle seat S1 is stored, first, an operation for jumping up the seat cushion 10 to the flip-up position (storage position) is performed, and this operation is transmitted to the slide member 54 to slide. The member 54 is slid to finally move the headrest 30 forward.

  More specifically, a storage operation band member ST2 (see FIG. 11) for receiving an operation for storing the vehicle seat S1 by an occupant is provided, and the storage operation band member ST2 is raised by a seat cushion to be described later. Fastened to the mechanism 60 side. The storage operation belt-like member ST2 extends from the side of the vehicle seat S1 facing the outside of the vehicle 1, and is positioned below the seat cushion 10 when the vehicle seat S1 is in the seating posture. To do.

  On the other hand, one end of a cable C is attached to the seat cushion flip-up mechanism 60 (more specifically, a link 121 of the movable unit 120 described later), and the other end of the cable C is connected to an arrange unit 80 described later. It is attached. Further, another cable C extends from the arrangement unit 80, and the tip of the cable C intersects the longitudinal direction on the other end side in the longitudinal direction of the slide member 54 (the side opposite to the side where the belt-shaped member ST1 is fastened). It is latched by the side wall of the extension part 54b extended in the direction.

  Under the above-described configuration, when the occupant pulls the storage operation band member ST2 toward the outside of the vehicle 1, the seat cushion flip-up mechanism 60 is activated to raise the seat cushion 10 toward the flip-up position. . Then, an operation performed by the seat cushion flip-up mechanism 60 to flip up the seat cushion 10 (specifically, a forward rotation operation of a link 121 described later) is slid via the cable C and the arrangement unit 80. It is transmitted to the member 54. That is, the cable C attached to the seat cushion jumping mechanism 60 is pulled by the operation performed to lift the seat cushion 10, and each operation unit of the arrangement unit 80 is operated by the pulling operation of the cable C. As a result, the cable C hooked on the extending portion 54b of the slide member 54 is pulled. By such a series of operations, the slide member 54 slides, and finally the lock member 53 swings toward the release position.

  Next, attachment of the headrest rotation mechanism 50 will be described. As described above, the headrest rotating mechanism 50 is attached to the upper portion of the seat back frame 21, and in particular, in the present embodiment, the headrest rotating mechanism 50 is attached to the front side of the seat back frame 21 with the stud bolt Bs.

  More specifically, in the present embodiment, each component of the headrest rotating mechanism 50 is not individually attached, but is attached to the seat back frame 21 in an integrated state as a unit. The headrest rotating mechanism 50 is attached to the seat back frame 21 in a state where the pillar 33 is assembled.

  Here, in the present embodiment, a mounting stud bolt Bs is set in advance on the front side of the seat back frame 21 before the headrest rotating mechanism 50 is mounted. On the other hand, a bolt receiving portion 51 a projecting outward is provided at the upper and lower portions of the casing 51 of the headrest rotating mechanism 50. When the headrest rotating mechanism 50 is attached to the seatback frame 21, the headrest rotating mechanism 50 is attached from the front side of the seatback frame 21 through the stud bolt Bs through the bolt hole formed in the bolt receiving portion 51a. As described above, in the present embodiment, the headrest rotation mechanism 50 can be attached as a unit, and can be attached from the front side of the seat back frame 21. Thereby, attachment of the headrest rotation mechanism 50 becomes easy, and the assembling property is improved.

  In the present embodiment, there are three places where the bolt receiving portions 51a are installed (in other words, the places where the headrest mechanism 50 is fixed to the seat back frame 21), and specifically, the casing 51 of the headrest rotating mechanism 50. There are two places on the upper side of the casing 51 and one place on the lower side of the casing 51. Here, the stud bolt Bs received by the bolt receiving portion 51a provided on the upper side of the casing 51 of the headrest rotating mechanism 50 is installed in the pillar collapse restricting portion 25 described above. In other words, in the present embodiment, the headrest rotation mechanism 50 is fixed to the pillar falling restricting portion 25.

  More specifically, a pillar fall restricting portion 25 is provided for each pillar 33 on the upper portion of the seat back frame 21, and stud bolts Bs are provided on the front surface of each pillar fall restricting portion 25. It is set in a state protruding somewhat from. The stud bolt Bs is passed through a bolt hole of a bolt receiving portion 51a provided on the upper side of the casing 51 of the headrest rotating mechanism 50, and the casing 51 is attached to the front surface of each pillar collapse regulating portion 25 with the stud bolt Bs. Thus, the headrest rotating mechanism 50 is fixed to each pillar falling restricting portion 25.

  As described above, in the present embodiment, the headrest rotating mechanism 50 is fixed by effectively using the space in which the pillar collapse restricting portion 25 is provided. As a result, the vehicle seat S1 can be reduced in size. More specifically, each pillar falling restricting portion 25 is located inside the both ends of the casing 51 of the headrest rotating mechanism 50 in the left-right direction (the width direction of the seat back frame 21). In this way, by providing the fixed portions of the headrest rotating mechanism 50 in the pillar fall restricting portion 25 positioned inside both ends of the casing 51 of the headrest rotating mechanism 50, both ends of the casing 51 of the headrest rotating mechanism 50 are provided. The vehicle seat S1 can be further reduced in size as compared with the case where the fixed portion is provided outside.

  The pillar 33 has a vertical portion 33 a extending in the vertical direction of the seat back frame 21, and the center of the front surface of the pillar collapse regulating portion 25 is located at a position where the vertical portion 33 a is located in the width direction of the seat back frame 21. The part is located, and the stud bolt Bs is set at this position. That is, in the present embodiment, the stud bolt Bs is present on the axis of the vertical portion 33a of the pillar 33. Thereby, the vehicle seat S1 can be further downsized. More specifically, in the width direction of the seat back frame 21, an area allocated for arranging the pillar 33 (particularly the vertical portion 33 a) is effective for setting the stud bolt Bs which is a member other than the pillar 33. By using, it is not necessary to separately secure a space for setting the stud bolt Bs, so that the vehicle seat S1 can be downsized.

  Further, in the pillar 33, the pillar collapse restricting portion 25 is located at a lower position in the vertical direction of the seat back frame 21 than the horizontal portion 33 b adjacent to the vertical portion 33 a and extending in the width direction of the seat back frame 21. The lower end of the front surface is located, and the stud bolt Bs is set at this position. Thereby, size reduction of the further vehicle seat S1 can be achieved. More specifically, an empty space is formed below the joining position of the vertical portion 33a and the horizontal portion 33b (in other words, the position where the pillar 33 is bent). If this empty space is used for installing the stud bolt Bs, it is not necessary to separately secure a space for setting the stud bolt Bs, and the vehicle seat S1 can be downsized.

  On the other hand, the stud bolt Bs received by the bolt receiving portion 51 a provided on the lower side of the casing 51 of the headrest rotating mechanism 50 is set on the pan frame 22 of the seat back frame 21. In particular, in the present embodiment, the stud bolt Bs is set in a portion of the pan frame 22 where a later-described reinforcing plate 26 overlaps. As described above, in the present embodiment, the stud bolt Bs is set in a higher rigidity portion of the pan frame 22, and the headrest rotating mechanism 50 is fixed by the stud bolt Bs. It is installed and each part of the headrest rotating mechanism 50 operates stably.

<< Seat cushion springing mechanism >>
The seat cushion flip-up mechanism 60 is an example of a flip-up mechanism, and when an operation for storing the vehicle seat S1 by the occupant is accepted, the seat cushion 10 is moved to the flip-up position as a start operation for storing the vehicle seat S1. The action of jumping up is performed. The seat cushion flip-up mechanism 60 is covered with a resin cover (not shown), and is installed on the vehicle body floor 2 so as to be positioned below the seat cushion 10 when the seat cushion 10 is positioned at the seating position. ing.

  As shown in FIGS. 4, 10, and 11, the seat cushion flip-up mechanism 60 includes two subunits, and one subunit is an attachment unit 110 that is attached to the vehicle body floor 2, and the other The sub-unit is a movable unit 120 that is disposed on the mounting unit 110 and performs a swing operation (rotation operation) with respect to the mounting unit 110 (in other words, the vehicle body floor 2).

  The mounting unit 110 includes a mounting plate 111 having an L-shaped appearance in a top view as a main component. Of the mounting plate 111, the first plate portion 112 extending along the front-rear direction of the vehicle 1 is fixed to the vehicle body floor 2 by bolts Bo and washers Ws fastened to the vehicle body floor 2 (see FIG. 11). Here, a long hole-shaped mounting hole 114 is formed at the rear end of the first plate portion 112, and the bolt Bo and the washer Ws set in the vehicle body floor 2 in advance are fitted into the mounting hole 114, A mounting unit 110 is disposed on the vehicle body floor 2.

  The central portion 114b in the longitudinal direction of the mounting hole 114 is somewhat wider than the front end portion 114a and the rear end portion 114c. When the bolt Bo and the washer Ws are fitted into the mounting hole 114 using such a configuration, the bolt Bo and the washer Ws are first passed through the central portion 114b in the longitudinal direction of the mounting hole 114, and then the bolt Bo is attached to the mounting hole. The mounting unit 110 is positioned by shifting the position of the mounting unit 110 so as to be fitted to the front end portion 114 a of the longitudinal direction 114.

  In addition, a lock portion 101 of the striker lock mechanism 100 is attached to a substantially central portion in the longitudinal direction of the first plate portion 112. The lock portion 101 includes a hook-shaped lock piece 102 and a housing 103 that accommodates the lock piece 102 in a swingable state. When the lock piece 102 is engaged with a striker 105 described later, the seat cushion 10 is fixed on the vehicle body floor 2 at the seating position. On the other hand, when the lock piece 102 swings, the striker 105 comes out of engagement with the lock piece 102, and the seat cushion 10 is released from the fixed state on the vehicle body floor 2 and is movable. It becomes.

  Further, the first plate portion 112 has a standing wall portion 112a on one side portion thereof, and the above-described storage operation portion is located slightly ahead of the position where the lock portion 101 is attached in the standing wall portion 112a. A slit 112b for passing the belt-shaped member ST2 is formed. The band member ST2 for storing operation passed through the slit 112b is disposed on the first plate portion 112 so as to intersect the first plate portion 112. In addition, one end of the cable C is connected to the end of the storing operation band member ST2 (the end on the inside of the vehicle 1 when viewed from the first plate portion 112), and the cable C is routed. A route defining portion 112c for defining the routing route is provided at an appropriate interval on a side portion of the first plate portion 112 (a side portion opposite to the side where the standing wall portion 112a is located).

  The other end of the cable C is connected to a connecting piece 104 that is connected to the lock piece 102 described above. As a result, when the band member ST2 for storage operation is pulled, the cable C pulls the lock piece 102 via the connecting piece 104. As a result, the lock piece 102 swings and the lock piece 102 and the striker 105 are engaged. The match will be released.

  On the other hand, in the mounting plate 111, the second plate portion 113 extending along the left-right direction of the vehicle 1 (the width direction of the vehicle seat S1) is a portion that forms the base of the movable unit 120, and is a central portion in the longitudinal direction. Is provided with a submarine bracket 115 for preventing a submarine phenomenon in which a passenger seated on the seat cushion 10 enters under the waist belt in the event of a collision of the vehicle 1.

  The movable unit 120 has a substantially portal structure and is bolted to the second plate portion 113 of the mounting plate 111. The movable unit 120 rotates the pair of links 121, the pair of pipe rods 122, the connecting bar 123 connecting the links 121, the mounting bracket 124 for mounting the seat cushion 10, the link 121 and the pipe rod 122. And a pair of support mechanisms 125 that are freely supported. These components are combined so as to be integrated as a unit, and when they are attached to the second plate portion 113 of the attachment plate 111, they are integrally attached as a unit.

  Each of the pair of links 121 is a long body configured by subjecting a sheet metal member to processing such as bead processing, and is located on both sides of the movable unit 120. Each link 121 is rotatably supported by fitting a rotation shaft 126A into a through hole (not shown) formed in the lower end portion thereof. Further, a connecting bar 123 that connects the links 121 is attached to the upper end of each link 121. Further, a mounting bracket 124 is attached to the upper surface of each link 121 on the outer surface thereof. The connecting bar 123 and the mounting bracket 124 are attached to the upper end portion of the link 121 by bolting in a co-tightening manner.

  Each of the pair of pipe rods 122 is arranged side by side with the link 121, and the rotation shaft 126 </ b> B is fitted into a through hole (not shown) formed in the lower end portion thereof, so that the rotation direction of the link 121 is the same. It is supported so as to be rotatable in the direction. A mounting bracket 124 is pinned to the upper end of each pipe rod 122. That is, in the present embodiment, the seat cushion 10 is supported by the pair of links 121 and the pair of pipe rods 122 via the mounting bracket 124. Each pipe rod 122 is rotated in the same direction as the rotation direction of the link 121 following the rotation of the link 121.

  Further, the striker 105 of the striker lock mechanism 100 described above is attached to the lower surface of the mounting bracket 124 attached to the link 121 and the pipe rod 122 on the side facing the outside of the vehicle 1 out of the pair of links 121 and the pipe rod 122. It is attached. When the link 121 and the pipe rod 122 are rotated so as to fall backward as viewed from the rotation shafts 126A and 126B, the striker 105 is provided on the mounting plate 111 (more specifically, the first plate portion 112). It will reach a position where it can engage with the lock piece 102 of the lock part 101.

  Each of the pair of support mechanisms 125 supports the link 121 and the pipe rod 122 in a rotatable manner. As shown in FIGS. 4, 10, and 11, in addition to the above-described rotation shafts 126 </ b> A and 126 </ b> B, A base bracket 127 and a damper rubber 129 are provided.

  The base bracket 127 is a substantially Z-shaped sheet metal member in a top view, forms a base of the movable unit 120, and is bolted to the second plate portion 113 of the mounting plate 111. Further, a portion of the base bracket 127 that extends along the front-rear direction of the vehicle 1 is a standing wall portion 127a, and the rotation shafts 126A and 126B are fixed to the standing wall portion 127a.

  The damper rubber 129 contacts the front end of the link 121 when the link 121 is rotated forward by the urging force of the spiral spring 128 to reach the front limit position, and absorbs an impact generated in the link 121. The damper rubber 129 is fixed to the above-described base bracket 127 so as to be located somewhat forward of the portion of the link 121 that becomes the pivot point.

  In this embodiment, in order to prevent the damper rubber 129 from being broken due to the contact (collision) of the link 121 with the damper rubber 129, the contact is in the position where the link 121 is in contact with the damper rubber 129 in the longitudinal direction. The part 121a is bent, and the front end of the contact part 121a is rounded.

  Of the pair of support mechanisms 125, the support mechanism 125 located outside the vehicle 1 is provided with a spiral spring 128. The spiral spring 128 urges the link 121 to fall forward. One end of the spiral spring 128 is locked to the rotating shaft 126A, and the other end is a link in a state where the link 121 is tilted to the rear side (in other words, a state before the seat cushion 10 jumps up). It is latched by the protrusion part (not shown) protruded from the side surface of 121.

  With the above configuration, when the striker 105 and the lock piece 102 are engaged, the seat cushion 10 receives the urging force of the spiral spring 128 via the link 121 (in other words, the spiral spring 128). It will be held in the seated position (against the biasing force). On the other hand, when the engagement between the striker 105 and the lock piece 102 is released, the urging force of the spiral spring 128 causes the link 121 to rotate forward so that the seat cushion 10 jumps up toward the flip-up position. Become.

  In the case shown in FIGS. 4, 10, and 11, the spiral spring 128 is provided for only one of the pair of links 121. In contrast, the spiral spring 128 may be provided.

  Furthermore, in this embodiment, the insertion hole 121b is formed in the longitudinal direction halfway position of one link 121 (link 121 located outside the vehicle 1), and the cable C is inserted into the insertion hole 121b. One end of is inserted. The other end of the cable C is connected to an arrangement unit 80 (more specifically, the first rotating member 83) described later. Therefore, when the seat cushion 10 is flipped up, the link 121 rotates to pull the cable C coupled to the link 121. Finally, in the arrangement unit 80 to which the cable C is connected, Each part of the unit operates by using the traction force of the cable C. The configuration and operation of the arrangement unit 80 will be described in detail later.

<< Seatback lodging mechanism >>
Next, the seat back overturning mechanism 70 will be described.
The seat back overturning mechanism 70 is a mechanism that rotates the seat back 20 that is rotatably supported by the seat back support unit 90 shown in FIG. 12 so as to fall forward. The seat back overturning mechanism 70 includes an urging spring 71 shown in FIG. 12 and a lock mechanism 72 shown in FIG. 13 as components.

  The urging spring 71 is an example of an urging member that urges the seat back 20 in the seating position so as to be tilted forward. Specifically, the urging spring 71 is a spiral provided on the seat back support unit 90 side. It is a spring. One end portion 71 a of the biasing spring 71 is locked to the rotating shaft 20 b of the seat back 20, and the other end portion 71 b of the biasing spring 71 is fixed to a locking pin 91 formed to protrude from the seat back support unit 90. It is hanging.

  The lock mechanism 72 is attached to a side portion of the seat back frame 21 facing the outside of the vehicle 1 via a bracket (not shown). The lock mechanism 72 includes a lock piece 73 that engages with a striker 74 provided on the vehicle main body side. By engaging the lock piece 73 and the striker 74, the lock mechanism 72 resists the biasing force of the biasing spring 71 described above. Thus, the seat back 20 is held in the sitting position. Here, the vehicle body means a portion of the vehicle 1 excluding the vehicle seat S1.

The configuration of the lock mechanism 72 will be described in more detail. The lock mechanism 72 includes a lock piece 73, a base portion 75, and a connecting portion 76 as shown in FIG. As described above, the lock piece 73 is a hook-shaped member that engages with the striker 74 and is supported so as to be rotatable with respect to the base portion 75. Here, the lock piece 73 is located at a position (engageable position) where the lock piece 73 can be engaged with the striker 74 and is not engageable with the striker 74, with a support shaft (not shown) standing on the base portion 75 as the center. It pivots so as to go back and forth between the positions (non-engageable positions).
The lock piece 73 is biased by a torsion spring (not shown) in a direction toward the engageable position in the rotation direction. On the other hand, when the lock piece 73 is rotated from the engageable position toward the non-engageable position against the biasing force of the torsion spring, the engagement state between the lock piece 73 and the striker 74 is released. Is possible.

  The connecting portion 76 is made of an oval metal plate member, and is attached to the base portion 75 so as to be slidable along the vertical direction. A lock piece 73 is attached to the lower end 76a (one end) side of the connecting portion 76, and when the connecting portion 76 slides upward, the lock piece 73 rotates in a direction toward the disengageable position. It is configured as follows. Further, a connecting rod 77c of the operation unit 77 described later and a cable C extending from the arrangement unit 80 side are connected to the upper end 76b (the other end) of the connecting unit 76.

  In the seat back overturning mechanism 70 as described above, the seat back 20 is held at the seating position against the urging force of the urging spring 71 when the lock piece 73 and the striker 74 are engaged. In other words, while the seat back 20 is engaged with the vehicle body, more specifically, the striker 74, the striker 74 keeps the seat back 20 standing against the biasing force of the biasing spring 71. Yes. In this sense, the striker 74 corresponds to an engaging portion that engages with the seat back 20 in order to maintain the seat back 20 in an upright state against the urging force of the urging spring 71.

  Then, when the connecting portion 76 slides upward, the lock piece 73 rotates so as to move from the engageable position to the non-engageable position. As a result, the lock piece 73 and the striker 74 are engaged. It will be released. As a result, the seat back 20 rotates so as to fall forward about the rotation shaft 20b by the biasing force of the biasing spring 71, and finally reaches the tilted position.

  In the present embodiment, a damper mechanism (not shown) is provided on the seat back support unit 90 side, and after the tilt angle of the seat back 20 reaches a predetermined angle, the tilt speed ( (Rotation speed) is gradually relaxed. As a result, the seat back 20 reaches the fall position at a slow speed, and in the unlikely event that the seat back 20 falls down in the state where there are people or objects between the seat back 20 and the vehicle body floor 2 Even so, it is possible to prevent an accident due to a collision with the seat back 20.

  By the way, in this embodiment, the path | route which provides the driving force for slidingly moving upward with respect to the connection part 76 (in other words, the driving force for rotating the lock piece 73 toward a non-engageable position) is provided. Two systems are available. One route is a route for receiving an operation performed by the occupant to tilt only the seat back 20 forward and transmitting the operation to the lock piece 73 via the connecting portion 76.

  More specifically, an operation unit 77 is provided at the upper end portion of the seat back 20 for receiving an operation performed by the occupant to tilt only the seat back 20 forward. Note that, on the upper end surface of the seat back 20, the position where the operation unit is disposed is located on the outer side of the vehicle 1 with respect to the belt-like member ST1 when viewed from the headrest 30 (see FIG. 2). As shown in FIG. 13, the operation unit 77 includes an operation cover 77a and an operation lever 77b that is rotatably supported with respect to the operation cover 77a. The operation cover 77a has a concave shape so that the operation lever 77b can be accommodated. The operation cover 77a is fixed to the seat back 20 in a state in which the collar portion is in contact with the upper end surface of the seat back 20. More specifically, the operation cover 77a is an attachment provided at the shoulder position of the seat back frame 21. It is fixed to a bracket 27 (see FIG. 5).

  The operation lever 77b is urged by an urging means (not shown) in a direction in which the operation lever 77b is accommodated in the operation cover 77a (specifically, a direction toward the front in the operation cover 77a). It is in the state. Further, a connecting rod 77c made of a metal member formed in a substantially lightning shape is connected to a predetermined position of the operation lever 77b. The connecting rod 77c moves upward in conjunction with an upward rotation operation of the operation lever 77b (specifically, an operation of rotating the operation lever 77b backward in the operation cover 77a). It is configured.

  When the occupant rotates the operation lever 77b upward in the operation unit 77 having the above-described configuration, the connection rod 77c moves upward. As a result, the above operation slides the connection unit 76 upward. The driving force to be transmitted is transmitted to the connecting portion 76. Finally, the upward sliding movement of the connecting portion 76 is transmitted to the lock piece 73 so that the lock piece 73 rotates toward the position where it cannot be engaged against the biasing force of the torsion spring. become. Thereby, the lock piece 73 which has been engaged with the striker 74 until then is released from the engaged state. As a result, only the seat back 20 rotates so as to fall forward alone. That is, it is possible for the occupant to tilt only the seat back 20 forward by performing an operation of rotating the operation lever 77b upward.

  Note that once the engagement between the lock piece 73 and the striker 74 is released, the lock piece 73 is then engaged with the striker 74 until the lock piece 73 rotates in the opposite direction and returns to the engageable position. It will be maintained in an impossible state.

  Another route for applying a driving force for sliding movement to the connecting portion 76 is a route for receiving an operation for the occupant to store the vehicle seat S <b> 1 and transmitting the operation to the connecting portion 76. That is, this path is for transmitting the operation to the connecting portion 76 when the vehicle seat S1 is accommodated, in which an operation for raising the seat cushion 10 to the flip-up position is performed.

  Specifically, as described in the headrest rotating mechanism, the vehicle seat S1 is provided with a storage operation band member ST2 that receives a storage operation of the vehicle seat S1. On the other hand, one end of the cable C is attached to the seat cushion flip-up mechanism 60 (more specifically, the link 121 of the movable unit 120), and the other end of the cable C is attached to an arrangement unit 80 described later. It has been. Further, another cable C extends from the arrangement unit 80, and the tip thereof is connected to the upper end portion 76 b of the connecting portion 76.

  Under the above configuration, when the occupant pulls the storage operation belt-like member ST2, the seat cushion flip-up mechanism 60 is actuated to flip up the seat cushion 10 toward the flip-up position. It is transmitted to the connecting portion 76 via the cable C and the arrange unit 80. As a result, the cable C attached to the seat cushion flip-up mechanism 60 is pulled, and the operating portions of the arrangement unit 80 are operated by the pulling operation of the cable C, and the connecting portions 76 are operated by the operation of the operating portions of the arrange unit 80. The cable C that is hooked on the upper end portion 76b is pulled. By the series of operations described above, the connecting portion 76 slides upward, the lock piece 73 swings toward the position where it cannot be engaged, and the engagement with the striker 74 is released.

  In other words, the present embodiment includes the release mechanism 200 that releases the engagement between the striker 74 and the seat back 20 by using the flip-up operation by the seat cushion flip-up mechanism 60. As a result of a series of movements of the respective portions of the release mechanism 200, the connecting portion 76 finally slides upward, and the lock piece 73 rotates toward the disengageable position. Then, as a result of the lock piece 73 that has been engaged with the striker 74 being released from the engagement state until the seat back 20 falls forward and reaches the position of the seat cushion 10 before the flip-up. Rotate. Thereafter, the lock piece 73 is maintained in a state in which the lock piece 73 cannot be engaged with the striker 74 until the lock piece 73 rotates in the opposite direction and returns to the engageable position.

<< Arrangement Unit >>
Next, the arrangement unit 80 will be described.
Arrangement unit 80 is a device for interlocking the upward movement of seat back 20 and the downward movement of headrest 30 with the upward movement of seat cushion 10 when storing vehicle seat S1. .

  More specifically, the arrangement unit 80 locks the headrest rotation mechanism 50 using the rotation operation of the link 121 of the seat cushion raising mechanism 60 as an operation performed to raise the seat cushion 10 as a driving force. It operates to swing the member 53 to the release position and to rotate the lock piece 73 of the seat back overturning mechanism 70 toward the non-engageable position. In other words, the arrangement unit 80 is a device for transmitting the rotation operation of the link 121 of the seat cushion flip-up mechanism 60 to the headrest rotation mechanism 50 and the seat back overturning mechanism 70 to operate these mechanisms. .

  In order to realize the above function, the arrangement unit 80 is connected to each of the link 121 of the seat cushion flip-up mechanism 60, the slide member 54 of the headrest rotating mechanism 50, and the connecting portion 76 of the seatback overturning mechanism 70. It is connected via a cable C as a member. Furthermore, the arrange unit 80 is connected to a fall angle detection mechanism 130 (the fall angle detection mechanism 130 will be described later) by a cable C as a linear member. That is, four cables C are extended from the arrangement unit 80.

  In the following description, for convenience of description, in order to distinguish the four cables C extended from the arrangement unit 80, the one connected to the link 121 of the seat cushion jumping mechanism 60 is referred to as the first cable C1. What is connected to the slide member 54 of the headrest rotation mechanism 50 is the second cable C2, what is connected to the connecting portion 76 of the seatback lie down mechanism 70 is the third cable C3, and the tilt angle detection mechanism 130. The connected one is called a fourth cable C4.

  In the present embodiment, as shown in FIG. 5, the arrangement unit 80 is slightly closer to the outside of the vehicle 1 than the center in the width direction of the seat back frame 21 in the front surface of the pan frame 22 constituting the seat back frame 21. It is bolted to the part. The mounting of the arrangement unit 80 will be described in detail later.

  The specific configuration of the arrangement unit 80 will be described. As shown in FIG. 14, the arrangement unit 80 includes a casing 81, a rotation shaft 82, a first rotation member 83, and a second rotation member 84 as main components. , A third rotating member 85, an engaging pin 86, a buffer rubber 87, a first coil spring 88a, a second coil spring 88b, and a third coil spring 88c. As described above, the arrangement unit 80 includes the seat cushion jumping mechanism 60 using the first cable C1, the headrest turning mechanism 50 using the second cable C2, the seat back overturning mechanism 70 using the third cable C3, Four cables C4 are connected to a tilt angle detection mechanism 130 described later. Hereinafter, each component will be described.

  The casing 81 has a substantially fan-like outer shape when viewed from above, and is a movable element of the arrange unit 80 (specifically, a first rotating member 83, a second rotating member 84, a third rotating member 85, etc.). The movable element is covered on the front side. The casing 81 has an attachment hole (not shown in FIG. 14) formed for attaching the rotation shaft 82.

  An arcuate guide slit 81b is provided in a portion of the casing 81 that is close to the outer edge. The guide slit 81b is a slit formed along the rotation direction of the first rotation member 83, and functions as a guide portion when the first rotation member 83 rotates. In the present embodiment, a step is formed in the casing 81 at the position of the guide slit 81b, and the central region 81c of the casing 81 adjacent to the guide slit 81b is more than the guide slit 81b in the thickness direction of the casing 81. Also, the outer region 81d located on the outer side is somewhat depressed on the back side.

  The rotation shaft 82 is a member that rotatably supports the first rotation member 83 and the second rotation member 84, and is detachably attached to the casing 81. In the present embodiment, the portion of the back surface of the casing 81 to which the rotating shaft 82 is attached is one step higher than the surrounding area, and forms a pedestal (not shown) of the rotating shaft 82. The first rotation member 83 is a metal piece member that rotates about the rotation shaft 82, and extends from the rotation shaft 82 toward the above-described guide slit 81b. A cable locking portion 83a that locks one end of the first cable C1 and one end of the first rotating member 83 in the extending direction (the end on the guide slit 81b side) and the guide slit 81b pass through the casing 81. A tongue-like portion 83b that wraps around from the back surface to the front surface is provided.

  Further, at the intermediate position in the extending direction of the first rotating member 83, the surface of the second rotating member 84 extends from the side of the first rotating member 83 (specifically, the second rotating member 84 has the outermost surface). It has a tongue-like engagement portion 83c that engages with the surface of the outer edge portion 84d. Further, a first coil spring 88a is attached to one end portion of the first rotation member 83 in the extending direction, and the first coil spring 88a moves the first rotation member 83 to one end position of the rotation range ( Specifically, the urging is performed so as to be directed toward a position where the first rotation member 83 is positioned at a normal time.

  With the above configuration, the first rotating member 83 is normally urged by the first coil spring 88a and is positioned at one end position of the rotating range. On the other hand, when the first cable C1 is pulled toward the link 121 by the rotational movement of the link 121 of the seat cushion springing mechanism 60, one end of the first rotational member 83 in the extending direction through the cable locking portion 83a. As a result, the first rotating member 83 is rotated from one end position to the other end position of the rotation range against the urging force of the first coil spring 88a.

  When the first rotating member 83 rotates, the tongue-shaped portion 83b of the first rotating member 83 moves in the guide slit 81b along the guide slit 81b, and the tongue-shaped portion of the first rotating member 83 The engaging portion 83c moves on the surface of the second rotating member 84 along the surface. Thereby, the first rotation member 83 can appropriately rotate within the set rotation range.

  If it explains clearly, in the 1st rotation member 83, the 1st coil spring 88a will be attached to the position (specifically one end part of the extension direction) a little apart from rotation axis 82 which is a fulcrum. One cable C1 is connected. For this reason, the 1st rotation member 83 may buckle so that the extension direction may be bent, and when it buckles, it becomes difficult to rotate in an appropriate rotation range. In order to avoid such a situation, in the present embodiment, a guide slit 81b is provided in the casing 81 so that the tongue-shaped portion 83b of the first rotating member 83 passes through the guide slit 81b, and the tongue-shaped portion of the first rotating member 83 is provided. The engaging portion 83 c is engaged with the outermost edge portion 84 d of the second rotating member 84 and moved on the surface of the second rotating member 84. Thereby, since the buckling mentioned above is controlled, it becomes possible for the 1st rotation member 83 to rotate appropriately the set rotation range.

  A protruding portion 83d that slightly protrudes outward from the other portions is formed at a portion of the first rotating member 83 located in the midway position in the extending direction. The protruding portion 83d is a portion that collides with a buffer rubber 87 described later when the first rotating member 83 returns from the other end position of the rotating range to the one end position by the biasing force of the first coil spring 88a. An arc-shaped hole (hereinafter referred to as an arc hole 83e) is also formed in the middle of the extending direction of the first rotating member 83, and an engagement pin 86 described later passes through the arc hole 83e. . Further, an attachment hole (not shown) for attaching the rotation shaft 85a of the third rotation member 85 is formed in the vicinity of the arc hole 83e.

  The second rotating member 84 is superimposed on the first rotating member 83 on the side opposite to the casing 81 (overlaid on the first rotating member 83 in the state shown in FIG. 14), and the rotation shaft. This is a substantially fan-shaped metal piece member that rotates about 82. A connection hole 84e formed to connect the end portions of the second cable C2 and the third cable C3 is formed in the outer edge portion of the second rotating member 84. And if the 2nd rotation member 84 rotates so that it may go to the other end position from the one end position of the rotation range, it will come to pull the said two cables C. FIG.

  A second coil spring 88b as an urging spring is attached in the vicinity of the position where the second cable C2 and the third cable C3 are connected in the outer edge portion of the second rotating member 84. The second coil spring 88b urges the second rotating member 84 to go to one end position of the rotating range (specifically, the position where the second rotating member 84 is normally located).

  Further, a through hole 84 a through which an engagement pin 86 described later passes is formed in the second rotating member 84 along the rotating direction of the second rotating member 84. The through hole 84a has a sufficiently large width as compared with the outer diameter of the engagement pin 86, and in particular, is located on one end side of the through hole 84a in the rotating direction of the second rotating member 84. The end portion is wider than the other portions. That is, in the present embodiment, a step is formed at a position near the one end of the through hole 84a in the rotation direction of the second rotation member 84. In other words, of the portion of the second rotating member 84 located at the periphery of the through hole 84a, a convex projecting toward the inside of the through hole 84a is formed on one end side in the rotating direction of the second rotating member 84. A portion 84b is formed.

  The engaging pin 86 is erected on a third rotating member 85 described later and moves integrally with the third rotating member 86. The locking pin 86 engages with the second rotating member 84 by being locked to the convex portion 84b, while moving in the through hole 84a so as to get over the convex portion 84b. The engagement state with the moving member is released.

  The second rotating member 84 configured as described above is normally urged by the second coil spring 88b and is positioned at one end position of the rotating range. At this time, the engaging pin 86 is located beside the convex portion 84b (more specifically, a position closer to one end than the convex portion 84b in the rotational direction of the second rotational member 84). When the engagement pin 86 moves in the through hole 84a so as to be engaged with the convex portion 84b, the second rotation member 84 is moved from one end position to the other end position of the rotation range by the engagement pin 86. It comes to be pressed toward.

  Then, due to the pressing force of the engaging pin 86, the second rotating member 84 rotates toward the other end position of the rotation range against the urging force of the second coil spring 88b. The second cable C2 and the third cable C3 are pulled. As a result, the seat back overturning mechanism 70 operates and the engagement between the striker 74 and the seat back 20 is released. In this sense, it can be said that the second rotating member 84 is a rotating body that rotates to release the engagement between the striker 74 and the seat back 20.

  On the other hand, when the engaging pin 86 moves in the through hole 84a so as to get over the convex portion 84b, the engagement between the second rotating member 84 and the engaging pin 86 is released. As a result, the second rotating member 84 is released from being pressed by the engaging pin 86 and is urged by the second coil spring 88b to return to one end position of the rotating range.

  A protruding portion 84 c is formed at a portion of the outer edge of the second rotating member 84 that is located at one end in the rotating direction of the second rotating member 84. The protruding portion 84c is a portion that collides with a buffer rubber 87 described later when the second rotating member 84 returns from the other end position of the rotating range to the one end position by the biasing force of the second coil spring 88b. Of the second rotating member 84, the outermost edge portion 84d farthest from the rotating shaft 82 has an arc shape, and the tongue-like engaging portion of the first rotating member 83 described above is formed on the surface thereof. 83c is disposed, and the tongue-like engagement portion 83c moves along the surface of the outermost edge portion 84d while engaging with the outermost edge portion 84d.

  The third rotation member 85 is a metal piece member that has a substantially bowl-shaped outer shape and rotates around a rotation shaft 85 a attached to the first rotation member 83. The third rotating member 85 is overlapped with the first rotating member 83 on the side where the casing 81 is located (in the state shown in FIG. 14, it is stacked under the first rotating member 83). A cylindrical engagement pin 86 is erected from the surface. The engagement pin 86 passes through the circular arc hole 83 e formed in the first rotation member 83 and also passes through the through hole 84 a of the second rotation member 84.

  A third coil spring 88 c is attached to one end of the third rotating member 85. The other end of the third coil spring 88c is hung on the other end in the extending direction of the first rotating member 83 (the end on the side where the rotating shaft 82 is located), and the outer peripheral surface of the engaging pin 86 is The third rotating member 85 is urged so as to contact the inner edge of the arc hole 83e. Due to the urging force of the third rotation member 85, the third rotation member 85 rotates relative to the first rotation member 83, and the outer peripheral surface of the engagement pin 86 is normally formed by the arc hole 83e. It comes to press against the inner edge. When the first rotation member 83 rotates in this state, the third rotation member 85 and the engagement pin 86 rotate integrally with the first rotation member 83.

  Further, the third rotating member 85 moves together with the first rotating member 83 from one end position to the other end of the rotating range (in other words, the first rotating member 83 resists the biasing force of the first coil spring 88a. When rotating (in the same direction as the rotating direction), the engaging pin 86 is locked to the convex portion 84b of the second rotating member 84 and engages with the second rotating member 84 (see FIG. 15B). . Thereby, the engagement pin 86 comes to press the 2nd rotation member 84 so that it may go to the other end position from the one end position of a rotation range. That is, in the arrangement unit 80 of the present embodiment, when the first rotation member 83 rotates with the second rotation member 84 engaged with the engagement pin 86, the engagement pin 86 is turned into the first rotation member. The second turning member 84 is pressed against the urging force of the second coil spring 88b by using the turning 83 to move the second turning member 84 from one end position to the other end position of the turning range. To rotate.

  On the other hand, the fourth cable C4 is connected to the tip of the engagement pin 86, and the fourth cable C4 is connected to the tilt angle detection mechanism 130 as described above (see FIG. 5), and the seat back 20 When it falls forward, the engaging pin 86 is pulled toward the vehicle body floor 2 side. Here, the tilt angle detection mechanism 130 has a latching portion (not shown) whose one end is latched on the vehicle body floor 2, and the other end of the latching portion is fixed to the seat back frame 21 side. The tilt angle detection mechanism 130 is a mechanism that pulls the engagement pin 86 toward the vehicle body floor 2 via the fourth cable C4 in conjunction with the tilting operation when the seat back 20 tilts forward.

The pulling force when the fall angle detection mechanism 130 pulls the engagement pin 86 increases as the fall angle of the seat back 20 increases, and when the fall angle reaches a preset set angle, the engagement pin The locking force between 86 and the convex portion 84b of the second rotating member 84 is exceeded. In such a situation, the third rotating member 85 rotates relative to the first rotating member 83 so that the engaging pin 86 gets over the top of the convex portion 84b by the pulling force of the fourth cable C4. To come.
The set angle can be arbitrarily set, for example, by adjusting the cable length of the fourth cable C4, the shape of the convex portion 84b, the installation position of the tilt angle detection mechanism 130, and the like. It is possible.

  Then, when the engaging pin 86 gets over the top of the convex portion 84b, the second rotating member 84 is released from the pressing by the engaging pin 86 and is urged by the second coil spring 88b to end one end of the rotating range. Return to position. When the engaging pin 86 gets over the top of the convex portion 84b, the third rotating member 85 again rotates integrally with the first rotating member 83, and accordingly, the engaging pin 86 is rotated. Moves along the inner edge of the through hole 84a while facing the side opposite to the side where the convex portion 84b is located.

  In the buffer rubber 87, the positions of the first rotating member 83 and the second rotating member 84 are urged by the corresponding coil springs 88a and 88b to return to one end position of the rotation range (position at the normal time). At this time, the damper collides with the protruding portion 83d of the first rotating member 83 and the protruding portion 84c of the second rotating member 84, and reduces the shock applied to each rotating member. The buffer rubber 87 has a cylindrical outer shape, and is supported by a support shaft 87 a erected on the back surface of the casing 81. In addition, the buffer rubber 87 according to the present embodiment is made of a hard rubber material in order to suppress a collision sound when the first rotating member 83 and the second rotating member 84 collide.

  In the present embodiment, a coil spring having a relatively high elastic coefficient is used as the first coil spring 88a so that the first rotating member 83 does not malfunction due to, for example, inertia force generated when the vehicle 1 collides. For this reason, when the 1st rotation member 83 returns to the one end position of a rotation range, a stronger urging | biasing force is applied to the 1st rotation member 83, and when reaching the one end position of a rotation range, it is more. A large impact is applied to the first rotating member 83. For this reason, in this embodiment, the effect of the buffer rubber 87 is more effectively achieved.

An operation example of each part of the arrangement unit 80 configured as described above will be described with reference to FIGS. 15A to 15D.
During normal times (when the vehicle seat S1 is in the seated posture), as shown in FIG. 15A, the first rotating member 83, the second rotating member 84, and the third rotating member 85 are respectively The first coil spring 88a, the second coil spring 88b, and the third coil spring 88c are biased by the corresponding coil springs and are positioned at the initial position.

  Here, the initial position of the first rotation member 83 is one end position of the rotation range, and specifically, a position where the protruding portion 83 d of the first rotation member 83 contacts the buffer rubber 87. . Similarly, the initial position of the second rotation member 84 is one end position of the rotation range, specifically, the position where the protruding portion 84 c of the second rotation member 84 contacts the buffer rubber 87. . The initial position of the third rotating member 85 is that the engaging pin 86 presses against the inner edge of the arc hole 83e formed in the first rotating member 83 and the through hole formed in the second rotating member 84. It is a position in the state arrange | positioned among 84a at the one end side in the rotation direction of the 2nd rotation member 84. As shown in FIG.

  When the flip-up operation by the seat cushion flip-up mechanism 60 is performed when the rotary members 83, 84, 85 are in their initial positions, the first cable is rotated by the rotation of the link 121 to which the first cable C1 is connected. C1 is pulled toward the link 121 side. As a result, the first rotation member 83 rotates toward the other end position of the rotation range against the urging force of the first coil spring 88a. At this time, since the engaging pin 86 is pressed against the inner edge of the arc hole 83 e of the first rotating member 83, the third rotating member 85 rotates together with the first rotating member 83.

  On the other hand, when the third rotation member 85 rotates together with the first rotation member 83, the engagement pin 86 moves in the through hole 84a formed in the second rotation member 84, and the state shown in FIG. As shown, it is engaged with the second rotating member 84 by being locked to the convex portion 84b. Thereafter, when the first rotation member 83 further rotates toward the other end position of the rotation range, the engaging pin 86 presses the second rotation member 84. Due to the pressing force of the engaging pin 86, the second rotating member 84 is rotated from one end position to the other end position of the rotation range against the urging force of the second coil spring 88b. The second cable C2 and the third cable C3 are pulled by the second rotating member 84.

  When the third cable C3 is pulled, as described above, the lock piece 73 of the lock mechanism 72 rotates to the non-engageable position, and the engagement state between the lock piece 73 and the striker 74 is released. The back 20 receives the urging force of the urging spring 71 and falls forward. When the seat back 20 starts to fall forward, the fourth cable C4 connected to the engagement pin 86 is pulled to the vehicle body floor 2 side by the tilt angle detection mechanism 130, and the traction force of the seat back 20 It gradually increases as the tilt angle increases.

  When the tilt angle of the seat back 20 reaches the set angle, the pulling force acting on the engaging pin 65 exceeds the locking force between the engaging pin 86 and the convex portion 84b of the second rotating member 84. Become. When this situation is reached, the third rotating member 85 rotates relative to the first rotating member 83 against the biasing force of the third coil spring 88c by the traction force of the fourth cable C4. By the relative rotation of the third rotation member 85, the engagement pin 86 gets over the top of the convex portion 84b as shown in FIG. 15C. As a result, the engagement state between the engagement pin 86 and the second rotation member 84 is released, and the second rotation member 84 is positioned at one end position (that is, the initial position) in the rotation range by the biasing force of the second coil spring 88b. ) Will come back.

  In addition, after the engagement pin 86 gets over the top part of the convex part 84b, the 3rd rotation member 85 rotates integrally with the 1st rotation member 83 again, and the engagement pin 86 is accompanied by this. Then, it moves along the inner edge of the through hole 84a formed in the second rotating member 84 while facing the side opposite to the side where the convex portion 84b is located (see FIG. 15D).

  By the way, when the second rotation member 84 returns to the one end position in the rotation range, the second cable C2 and the third cable C3 are released from being pulled by the second rotation member 84, and thereby the lock mechanism 72 is locked. The piece 73 rotates so as to return from the disengageable position to the engageable position (that is, the striker 74 and the seat back 20 can be engaged again).

  In other words, in the present embodiment, the engagement pin 86 continues to be locked to the convex portion 84b of the second rotating member 84 after the seat back 20 is tilted forward until the tilt angle reaches the set angle. Therefore, as a result of the second rotating member 84 continuing to pull the third cable C3, the lock piece 73 connected to the third cable C3 remains in the non-engageable position. That is, even if the occupant performs an operation to raise the seat back 20 after the seat back 20 starts to fall forward until the tilt angle reaches the set angle, the lock piece 73 is positioned at the disengaged position. For this reason, the lock piece 73 cannot be engaged with the striker 74 and the seat back 20 cannot be fixed again at the seating position.

  On the other hand, when the tilt angle of the seat back 20 reaches the set angle and the engagement pin 86 gets over the convex portion 84b, the engagement between the engagement pin 86 and the second rotating member 84 is released, The second rotation member 84 returns to the one end position in the rotation range. As a result, the second rotating member 84 no longer pulls the third cable C3, and the lock piece 73 connected to the third cable C3 is again positioned at the engageable position. That is, if the occupant performs an operation to raise the seat back 20 after the tilt angle of the seat back 20 reaches the set angle, the lock piece 73 is engaged with the striker 74, thereby causing the seat back 20 to be in the seating position again. It becomes possible to fix (relock).

  As described above, in the present embodiment, the release mechanism 200 for releasing the engagement between the striker 74 and the seat back 20 by using the flip-up operation by the seat cushion jump-up mechanism 60 is provided. The release mechanism 200 is mainly configured by the first rotating member 83, the second rotating member 84, and the engaging pin 86 described above.

When the seat cushion jumping mechanism 60 performs the flipping-up operation, the first rotating member 83 uses the jumping-up operation to resist the urging force of the first coil spring 88a from one end position of the rotating range. It turns to go to the other end position. Along with this, first, the engaging pin 86 is locked to the convex portion 84 b and engaged with the second rotating member 84, and the engaging pin 86 is moved by the further rotation of the first rotating member 83. The second rotating member 84 is rotated from one end position to the other end position of the rotation range against the urging force of the two-coil spring 88b. In other words, the engagement pin 86 utilizes the rotation of the first rotation member 83 to move the second rotation member 84 from the one end position of the rotation range to the other end against the urging force of the second coil spring 88b. Rotate towards position.
As a result, the seat back overturning mechanism 70 operates and the striker 74 and the seat back 20 are disengaged.

  Furthermore, in the present embodiment, the seat back 20 that has been disengaged from the striker 74 by the release mechanism 200 during the storage operation of the vehicle seat S1 is returned to a state in which it can be engaged with the striker 74. A return mechanism 210 that performs a return operation (cancellation operation) is provided. In the present embodiment, the above-described return operation is performed according to the tilt angle of the seat back 20 that is disengaged from the striker 74 and the seat back 20 and falls forward due to the biasing force of the biasing spring 71. More specifically, this is automatically performed when the tilt angle reaches the set angle.

  More specifically, the return mechanism 210 is mainly composed of the third rotating member 85, the second coil spring 88b, and the tilt angle detecting mechanism 130 described above. The return mechanism 210 returns the second rotation member 84 that is rotating from one end position of the rotation range to the other end position to the one end position of the rotation range, thereby causing the striker 74 and the seat back 20 to move. Are returned to a state where they can be engaged again. As described above, the returning operation is performed by the falling angle detection mechanism 130 pulling the fourth cable C4 connected to the engaging pin 86 by using the falling operation of the seat back 20 forward. Is triggered by pulling the vehicle body 2 toward the vehicle body floor 2 side.

  When the tensile force exceeds the locking force between the engaging pin 86 and the convex portion 84 b of the second rotating member 84, the third rotating member 85 is relatively moved with respect to the first rotating member 83. It will turn. As a result, the engaging pin 86 moves in the through hole 84a so as to get over the top of the convex portion 84b, and the engaged state with the second rotating member 84 is thereby released. The second rotation member 84 released from the engagement pin 86 is returned to the one end position of the rotation range by the urging force of the second coil spring 88b. That is, the return operation in the present embodiment refers to releasing the engaged state between the second rotating member 84 and the engaging pin 86 and rotating the position of the second rotating member 84 by the urging force of the second coil spring 88b. This is an operation to return to one end position of the moving range.

  As a result of executing the above-described return operation, the lock piece 73 of the seat back overturning mechanism 70 returns to the disengageable position, so that the striker 74 and the seat back 20 are returned to the engageable state again. Accordingly, after the return operation is performed, the seat back 20 in the midway forward state is raised until it is positioned at the seating position, so that the striker 74 is engaged and fixed at the seating position.

  In the present embodiment, the engagement between the striker 74 and the seat back 20 is released after the jump-up operation by the seat cushion jump-up mechanism 60 is started. Then, after the striker 74 and the seat back 20 are disengaged and the seat back 20 starts to fall forward by the biasing force of the biasing spring 71, the above-described tilt angle reaches a preset set angle. At the time, the return mechanism 210 performs the return operation. Thus, in this embodiment, since there is a time difference between the release of the engagement between the striker 74 and the seat back 20 and the execution of the return operation, for example, the engagement between the striker 74 and the seat back 20 is released. Immediately after being released, the return operation is performed, and it is possible to avoid a problem that the engagement between the striker 74 and the seat back 20 should have been released, but is not properly released.

  Next, attachment of the arrangement unit 80 will be described. In the present embodiment, each component of the arrange unit 80 is not individually attached, but is attached to the pan frame 22 in an integrated state as a unit. Here, a mounting stud bolt Bs is attached in advance to the front side of the pan frame 22 in a stage before the arrangement unit 80 is attached. On the other hand, the casing 81 of the arrangement unit 80 is provided with bolt receiving portions 81a at a plurality of locations at appropriate intervals along the outer periphery thereof.

  When the arrange unit 80 is attached to the pan frame 22, the arrange unit 80 is attached from the front side of the pan frame 22 through the stud bolt Bs through the bolt hole formed in the bolt receiving portion 81a. Thus, in this embodiment, the arrangement unit 80 can be attached as a single unit, and can be attached from the front side of the pan frame 22. Thereby, attachment of arrangement unit 80 becomes easy and the assembling property improves.

  In the present embodiment, there are three installation locations (in other words, locations where the arrangement unit 80 is fixed to the pan frame 22) of the bolt receiving portion 81a, and each installation location is positioned on the apex of a triangle. Is set. Here, since it becomes possible to stabilize the operation | movement of the member arrange | positioned in the said area | region in the triangular area | region which makes the installation location of the bolt receiving part 81a a vertex, in the said area | region, the above-mentioned engagement pin 86 is included. And the movable range of the engagement pin 86 is set within the region, the operation of the engagement pin 86 can be performed stably.

  In the present embodiment, one of the installation locations of the bolt receiving portion 81 a is located in the vicinity of the shock absorbing rubber 87. In other words, the movable members (specifically, the first rotating member 83 and the second rotating member 84) collide with the buffer rubber 87 in the vicinity of the fixed portion of the arrange unit 80. In this way, the arrangement unit 80 is fixed in the vicinity of the position where the collision between the members occurs, so that the arrangement position of the arrangement unit 80 is prevented from changing even if the above-described collision occurs. 80 can be stably placed on the pan frame 22. In order to exhibit the above effect more effectively, the arrangement position of the support shaft 87a of the shock absorbing rubber 87 is an extension line connecting the collision position between the movable member and the shock absorbing rubber 87 and the installation position of the bolt receiving portion 81a. It is more preferable that it is located in.

  Further, in the present embodiment, the arrangement unit 80 is attached at a substantially central position in the vertical direction of the seat back frame 21. Thereby, the operation stability of each part of arrangement unit 80 improves.

More specifically, since the band-shaped member ST1 that accepts an operation of tilting the headrest 30 forward alone is provided at the upper end of the seat back 20, the headrest rotating mechanism 50 that operates by pulling the band-shaped member ST1 is: It is arranged near the upper end of the seat back 20. Further, the arrangement unit 80 that operates to drive the headrest rotating mechanism 50 is also preferably arranged near the headrest rotating mechanism 50 (that is, the upper end portion of the seat back 20) from the viewpoint of operational stability. preferable. On the other hand, the arrange unit 80 transmits the raising operation by the seat cushion raising mechanism 60 to the headrest rotation mechanism 50 and the seat back overturning mechanism 70. From this viewpoint, the seat cushion 10 (more precisely, the seat cushion 10). It is desirable to dispose near the cushion flip-up mechanism 60), that is, near the lower end of the seat back 20.
Due to the circumstances as described above, in the present embodiment, the arrangement unit 80 is attached to an intermediate position between the upper end and the lower end of the seat back frame 21 to improve the operation stability of the arrangement unit 80.

  Furthermore, in this embodiment, the arrangement unit 80 is attached to the position outside the vehicle 1 in the left-right direction (that is, the width direction of the seat back frame 21) from the viewpoint of improving the operational stability. This is because the end portion of the first cable C1 extending from the arrangement unit 80 is attached to the link 121 located outside the vehicle 1 out of the pair of links 121 provided in the seat cushion springing mechanism 60. This is a configuration for improving the operational stability by shortening the cable length as much as possible.

  Further referring to the mounting of the arrangement unit 80, in the present embodiment, the reinforcing plate 26 for increasing the rigidity of the pan frame 22 is arranged at the center in the height direction of the pan frame 22 (corresponding to the vertical direction of the seat back frame 21). It is attached at a position slightly closer to the upper side. The arrangement unit 80 is attached so that a part of the arrangement unit 80 hangs on a portion of the pan frame 22 where the reinforcing plate 26 is laid (that is, a portion with increased rigidity). Specifically, one of the attachment locations of the arrange unit 80 (that is, the installation location of the bolt receiving portion 81 a) is located on the reinforcing plate 26.

  As described above, as a result of increasing the rigidity of the mounting portion of the arrange unit 80, the operation of each operating portion (specifically, the first rotating member 83 and the second rotating member 84 described later) of the arrange unit 80 is stabilized. It becomes possible. As a result, the function of the arrangement unit 80 described above (the function of transmitting the flip-up operation by the seat cushion flip-up mechanism 60 to the headrest rotation mechanism 50 and the seat back overturning mechanism 70) is appropriately exhibited.

  The reinforcing plate 26 has a long rectangular shape along the width direction of the seat back frame 21, and one end portion in the longitudinal direction reaches the pipe frame 23 and is joined to the pipe frame 23 at the position. Has been. Thereby, the reinforcement effect by the reinforcement board 26 can be improved, and the rigidity of the attachment location of the arrangement unit 80 can further be improved.

  Further, in the present embodiment, the headrest rotation mechanism 50 is fixed to the pan frame 22 at a position above the arrangement unit 80. As described above, the arrangement unit 80 and the headrest rotating mechanism 50 are arranged side by side in the vertical direction, so that the rigidity of the pan frame 22 is further improved. In addition, the arrange unit 80 is attached to the pan frame 22 with its upper part reaching the reinforcing plate 26, and the headrest rotating mechanism 50 is attached to the pan frame 22 with its lower part coming to the reinforcing plate 26. ing. That is, the reinforcing plate 26 is laid at a position sandwiched between the headrest rotating mechanism 50 and the arrangement unit 80 in the vertical direction of the seat back frame 21. Thereby, the rigidity of the pan frame 22 is further improved.

Next, the routing route of each cable C extended from the arrangement unit 80 will be described with reference to FIG.
Among the cables C extended from the arrangement unit 80, the first cable C1 connected to the link 121 of the seat cushion flip-up mechanism 60 extends from the lower part of the casing 81 of the arrangement unit 80, as shown in FIG. The seatback frame 21 is routed so as to pass through the substantially central portion of the pan frame 22 in the width direction.

  As shown in FIG. 5, the second cable C2 connected to the headrest rotating mechanism 50 extends from the side portion of the casing 81 of the arrange unit 80 (more precisely, the side portion facing the outside of the vehicle 1). After being taken out, it is folded back and routed so that its tip faces the slide member 54 of the headrest rotating mechanism 50.

  As shown in FIG. 5, the third cable C3 connected to the seatback overturning mechanism 70 extends from the side of the casing 81 of the arrange unit 80 (more precisely, the side facing the outside of the vehicle 1). It is routed toward the mounting bracket 27 provided at the shoulder position of the seat back frame 21. Thereafter, the third cable C3 is folded back on the side of the mounting bracket 27, and the leading end thereof is connected to the connecting portion 76 of the seat back falling mechanism 70.

  As shown in FIG. 5, the fourth cable C <b> 4 connected to the fall angle detection mechanism 130 extends from the lower part of the casing 81 of the arrange unit 80, and the side of the pan frame 22 facing the outside of the vehicle 1. Routed through. Here, a portion of the fourth cable C4 from when it leaves the arrangement unit 80 until it is connected to the fall angle detection mechanism 130 bends and stretches in conjunction with the fall operation of the seat back 20 ( FIG. 5 shows the fourth cable C4 in a state of being bent in a dogleg shape. In other words, the fourth cable C4 is provided with a surplus portion (so-called play) at a midway position thereof, and performs a bending / extending operation (flapping operation) in accordance with the falling operation of the seat back 20.

  As described above, since the fourth cable C4 bends and stretches on the surface of the seat back frame 21, the fourth cable C4 is accommodated in the seat back frame 21 even if the fourth cable C4 bends and stretches. It is necessary to secure enough space. For this reason, in this embodiment, as shown in FIG. 16, it is arranged between the side of the pan frame 22 facing the outside of the vehicle 1 and the pipe frame 23 positioned on the side. The search space AS is provided, and the fourth cable C4 can be embedded in the search space AS.

  In the present embodiment, since the above-described routing space AS is formed, even if the fourth cable C4 performs a bending / extending operation (particularly a bending operation), the fourth cable C4 is accommodated in the space, The cable C4 can be properly routed. In addition, since the routing space AS is formed, the fourth cable C4 comes under the pipe frame 23 when bent, and it is possible to avoid contact with the pipe frame 23. Thereby, it is possible to suppress the generation of abnormal noise due to the cable C hitting the pipe frame 23.

  Note that a standing wall-like cable return wall 22a is formed at the outer edge of the portion of the pan frame 22 that constitutes the routing space AS. By forming the cable return wall 22a, it is possible to restrict the fourth cable C4 that has entered the routing space AS from protruding out of the seat back frame 21. As a result, the fourth cable C4 is properly routed on the pan frame 22.

  Further, in the present embodiment, the routing space AS is provided at the end closer to the arrangement unit 80 among the both ends in the width direction of the seat back frame 21, that is, the end facing the outside of the vehicle 1. It has been. As a result, the effect of providing the routing space AS is more effectively achieved.

  Specifically, as described above, the arrangement unit 80 is attached to a position slightly outside the vehicle 1 in the width direction of the seat back frame 21. In addition, the fourth cable C4 extended from the arrangement unit 80 needs to be routed to the fall angle detection mechanism 130 through a path as short as possible from the viewpoint of ensuring operational stability. Considering the above matters, in the present embodiment, the fourth cable C4 is routed through the side of the pan frame 22 facing the outside of the vehicle 1. Therefore, the flutter of the fourth cable C4 occurs on the end of the pan frame 22 on the side facing the outside of the vehicle 1, and therefore the routing space AS that absorbs the flutter is disposed on the side facing the outside of the vehicle 1. If it is provided at the end, the effect can be exhibited more effectively.

<< Effectiveness of Vehicle Seat According to this Embodiment >>
As described above, in the vehicle seat S1 according to the present embodiment, in addition to the release mechanism 200, the seat back 20 in a state where the engagement with the striker 74 is released can be engaged with the striker 74. There is a return mechanism 210 that performs a return operation for returning. The return mechanism 210 is configured to perform a return operation according to the tilt angle of the seat back 20 that has fallen forward. In particular, in the present embodiment, the return operation is performed when the above-mentioned tilt angle reaches a preset angle. As a result, the disengagement between the striker 74 and the seat back 20 and the re-engagement between the striker 74 and the seat back 20 can be appropriately executed, and the vehicle seat S1 having excellent operability is realized. Become.

  That is, in the vehicle seat S <b> 1 according to this embodiment, after the engagement between the striker 74 and the seat back 20 is released, the seat back 20 surely falls forward due to the biasing force of the biasing spring 71. become. On the other hand, when the tilt angle of the seat back 20 that has tilted forward reaches a predetermined angle, the striker 74 and the seat back 20 return to a state where they can be engaged again. As a result, even if the engagement between the striker 74 and the seat back 20 is erroneously released and the seat back 20 falls forward, the striker 74 and the seat back 20 are returned to a state where they can be engaged again. It becomes possible. In other words, in the present embodiment, when the vehicle seat S1 is stored, the striker 74 and the seat back 20 are disengaged to reliably tilt the seat back 20 forward, while the seat back 20 is tilted forward. Even so, the striker 74 and the seat back 20 can be re-engaged, and the operability is improved.

  The vehicle seat S1 according to the present embodiment has the striker 74 and the seat back 20 when the second rotation member 84 provided in the arrangement unit 80 rotates from one end position to the other end position of the rotation range. When the second rotation member 84 returns to one end position of the rotation range, the striker 74 and the seat back 20 can be engaged again. With such a configuration, by controlling the position of the second rotating member 84, the state where the striker 74 and the seat back 20 are disengaged and the striker 74 and the seat back 20 can be engaged again. It becomes possible to appropriately switch to the state that has become.

Further, in the vehicle seat S1 according to the present embodiment, the engagement pin 86 that engages with the second rotation member 84 and the second rotation member 84 that urges the second rotation member 84 toward the one end position of the rotation range. A two-coil spring 88b is provided. And if the 1st rotation member 83 rotates in the state in which the 2nd rotation member 84 engaged with the engagement pin 86, the engagement pin 86 will use the rotation of the 1st rotation member 83, The second turning member 84 is turned from one end position to the other end position of the turning range against the urging force of the second coil spring 88b, and the second turning member 84 and the engaging pin 86 are engaged. When the state is released, the position of the second rotation member 84 is returned to one end position of the rotation range by the urging force of the second coil spring 88b. That is, in the present embodiment, the return mechanism 210 includes the second rotation member 84 that is rotated toward the other end position of the rotation range by the engagement pin 86 and the engagement pin as a return operation. 86 is released.
With this configuration, in the present embodiment, the position of the second rotation member 84 can be controlled by adjusting the mechanical configuration of the engagement state between the second rotation member 84 and the engagement pin 86. It becomes possible. As a result, it is possible to switch between a state in which the striker 74 and the seat back 20 are disengaged and a state in which the striker 74 and the seat back 20 can be engaged again with a relatively simple configuration. .

Furthermore, in the vehicle seat S1 according to the present embodiment, a convex portion 84b is formed in a portion of the second rotating member 84 where the peripheral edge of the through hole 84a is located, and the engaging pin 86 is engaged with the convex portion 84b. The second rotating member 84 is engaged by being stopped. Further, in the vehicle seat S1 according to the present embodiment, the tilt angle detection mechanism 130 that pulls the engagement pin 86 so that the engagement pin 86 gets over the convex portion by using the forward tilting operation of the seat back 20. Is provided.
The pulling force of the tilt angle detection mechanism 130 exceeds the locking force between the engagement pin 86 and the convex portion 84b when the tilt angle of the seat back 20 reaches the set angle. Gets over the convex portion 84b.
With this configuration, in the present embodiment, the engagement state between the second rotating member 84 and the engagement pin 86 can be switched with a relatively simple configuration. Further, by adjusting the shape of the convex portion 84b, it is possible to adjust the time point when the engagement pin 86 gets over the convex portion 84b.

<< Other Embodiments >>
In the above embodiment, the vehicle seat S1 has been described as an example of the vehicle seat of the present invention. However, the above embodiment is for facilitating the understanding of the present invention, and does not limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof. Further, the above-described materials, shapes, and the like are merely examples for exhibiting the effects of the present invention, and do not limit the present invention.

Moreover, in said embodiment, the headrest rotation mechanism 50 and the arrangement unit 80 each have the separate casings 51 and 81, and the attachment location to the seat back frame 21 of each casing 51 and 81 is mutually mutually. It was decided to be in a different position. However, the present invention is not limited to this, and the mounting position of the casing 51 of the headrest rotating mechanism 50 and the mounting position of the casing 81 of the arrangement unit 80 may be the same position. In other words, the bolt receiving part 51a provided in the casing 51 of the headrest rotating mechanism 50 and the bolt receiving part 81a provided in the casing 81 of the arrange unit 80 receive the same stud bolt Bs, and the stud bolt Bs. It may be fastened together.
Further, the headrest rotation mechanism 50 and the arrangement unit 80 may share a casing (that is, the casing 51 of the headrest rotation mechanism 50 and the casing 81 of the arrangement unit 80 are integrated). .

1 vehicle, 2 body floor, 3 luggage compartment,
10 Seat cushion, 10a Overhang,
11 Cushion frame,
20 seat back, 20a pedestal, 20b pivot shaft,
21 Seat back frame,
22 Pan frame, 22a Cable return wall,
23 pipe frame, 24 hook
25 pillar fall regulation part, 26 reinforcing plate,
27 Mounting bracket,
30 headrest,
31 inner frame, 31a leg part, 31b lower end flange part,
32 guide, 32a bottom flange,
33 pillar, 33a vertical part, 33b horizontal part,
33c Pillar side engaging part, 33d Notch,
40 armrest,
50 headrest rotation mechanism,
51 casing, 51a bolt receiving part,
52 biasing spring, 53 locking member,
54 slide member, 54a one longitudinal end,
54b extension part,
60 Seat cushion springing mechanism,
70 seat back overturning mechanism, 71 biasing spring,
71a one end, 71b the other end,
72 lock mechanism, 73 lock piece, 74 striker,
75 base part, 76 connecting part, 76a lower end part,
76b upper end,
77 operation section, 77a operation cover, 77b operation lever,
77c connecting rod,
80 arrangement units,
81 casing, 81a bolt receiving part, 81b guide slit,
81c central region, 81d outer region, 82 pivot axis,
83 first rotating member, 83a cable locking part, 83b tongue-like part,
83c tongue-shaped engaging portion, 83d protruding portion, 83e arc hole,
84 second rotating member, 84a through hole, 84b convex portion,
84c protrusion, 84d outermost edge, 84e connection hole,
85 third rotating member, 85a rotating shaft,
86 engaging pin, 87 buffer rubber, 87a support shaft,
88a first coil spring, 88b second coil spring,
88c third coil spring,
90 seat back support unit, 91 locking pin,
100 striker lock mechanism,
101 lock part, 102 lock piece, 103 housing,
104 connecting pieces, 105 strikers,
110 mounting unit, 111 mounting plate,
112 1st board part, 112a Standing wall part,
112b slit, 112c route defining part,
113 Second plate part, 114 mounting hole,
114a front end, 114b center, 114c rear end,
115 submarine bracket,
120 movable units, 121 links,
121a contact part, 121b insertion hole,
122 pipe rod, 123 connecting bar,
124 mounting bracket, 125 support mechanism,
126A, 126B Rotating shaft, 127 Base bracket,
127a Standing wall,
128 spiral spring, 129 damper rubber,
130 tilt angle detection mechanism,
200 release mechanism, 210 return mechanism,
AS wiring space, Bo bolt, Bs stud bolt,
C cable, C1 first cable, C2 second cable,
C3 3rd cable, C4 4th cable,
S1, S11, S12 Vehicle seat,
ST1 strip member, ST2 storage operation strip member, Ws washer

Claims (7)

A seating section on which an occupant sits;
A support that supports the occupant from the back,
A flip-up mechanism that flips up the seat;
A biasing member that biases the support portion so as to tilt forward;
An engagement portion that engages with the support portion to maintain the support portion in an upright state against the urging force of the urging member;
A release mechanism for releasing the engagement between the engagement portion and the support portion by using a flip-up operation by the flip-up mechanism;
A return mechanism that performs a return operation for returning the support portion in a state in which the engagement with the engagement portion is released by the release mechanism to a state in which the support portion can be engaged with the engagement portion;
The return mechanism performs the return operation in accordance with a tilt angle of the support portion that is released forward by the biasing force of the biasing member after the engagement between the engagement portion and the support portion is released. A feature vehicle seat. The engagement between the engagement portion and the support portion is released after the start of the flip-up operation,
When the engagement between the engagement portion and the support portion is released and the support portion starts to fall forward by the biasing force of the biasing member, and then the tilt angle reaches a preset set angle The vehicle seat according to claim 1, wherein the return mechanism performs the return operation. The release mechanism includes a rotating body that rotates to release the engagement between the engagement portion and the support portion,
When the rotating body rotates from one end position to the other end position of the rotation range, the engagement between the engagement portion and the support portion is released,
When the rotating body returns to the one end position of the rotation range, the engaging portion and the support portion can be re-engaged,
The return mechanism performs an operation of returning the position of the rotating body in the rotation range to the one end position as the return operation when the tilt angle of the support portion reaches the set angle. The vehicle seat according to claim 2. The release mechanism includes a first rotating member that rotates using the flip-up operation, a second rotating member as the rotating body, and an engagement pin that engages with the second rotating member. Prepared,
The return mechanism includes a biasing spring that biases the second rotating member toward the one end position of the rotation range,
When the first rotating member rotates while the second rotating member is engaged with the engaging pin, the engaging pin uses the rotation of the first rotating member to bias the urging force. Rotating the second rotating member against the biasing force of a spring from the one end position of the rotating range toward the other end position;
The return mechanism releases the engagement state between the second rotating member and the engagement pin as the return operation when the tilt angle of the support portion reaches the set angle, and the bias The vehicle seat according to claim 3, wherein an operation of returning the position of the second rotation member to the one end position of the rotation range is performed by a biasing force of a spring. A through hole through which the engagement pin passes is formed in the second rotating member,
A convex portion that protrudes toward the inside of the through hole is formed on a portion of the second rotating member that is positioned at the periphery of the through hole.
The engaging pin engages with the second rotating member by being locked to the convex portion, and moves with the second rotating member by moving in the through hole so as to get over the convex portion. Release the engaged state,
The return mechanism includes a pulling member that pulls the engagement pin so that the engagement pin gets over the convex portion by using a forward tilting operation of the support portion.
5. The pulling member according to claim 4 , wherein the pulling member pulls the engaging pin so that the engaging pin gets over the convex portion when the tilt angle of the support portion reaches the set angle. 6. Vehicle seat.   It further has a buffer rubber body that collides with the second rotating member when the position of the second rotating member returns to the one end position of the rotating range by the urging force of the urging spring. The vehicle seat according to claim 4 or 5. A rotating shaft that rotatably supports the first rotating member and the second rotating member;
A casing on which the rotating shaft is attached and covering the first rotating member and the second rotating member;
The casing includes a slit formed along a rotation direction of the first rotation member,
5. The first rotating member includes a protrusion that moves in the slit along the rotating direction when the first rotating member rotates. The vehicle seat according to any one of 6.

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