JP5869390B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat including a seat cushion and a seat back.

  2. Description of the Related Art Conventionally, there is known a vehicle seat provided with a pressure receiving member that is disposed behind an occupant between left and right side frames and is movable rearward with respect to the left and right side frames (see Patent Document 1). ). Such a pressure-receiving member supports the occupant's upper body from the rear via a cushion material during normal seating, and is pushed by the occupant's upper body that moves backward during a rear-end collision to move backward. The body can sink into the seat back. Since the occupant's upper body sinks into the seat back, the occupant's head is supported close to the headrest, so that the impact applied to the occupant's neck during a rear-end collision can be reduced.

JP 2010-83268 A

  By the way, the applicant of the present application, in order to suitably receive the centrifugal force applied to the occupant by turning of the vehicle with the pressure receiving member, the pressure receiving member, the pressure receiving portion that supports the occupant's back, and the left and right ends of the pressure receiving portion in the left-right direction. It is composed of a support portion that extends outward and forward and supports the upper body side portion of the occupant, and swings the left and right end portions of the pressure receiving member in the front-rear direction in accordance with the turning of the vehicle by a pair of left and right actuators. thinking. In this case, it is desired to arrange the pair of left and right actuators in a compact manner with respect to the support portion that extends outward in the left and right direction and forward.

  Accordingly, an object of the present invention is to make the vehicle seat compact by arranging the support portion and the actuator (drive source) in a compact manner.

  The present invention that solves the above-described problems is a vehicle seat that includes a seat cushion and a seat back, and includes left and right side frames that constitute the left and right frames of the seat back, and includes an occupant between the left and right side frames. A pressure receiving member disposed at the rear of the pressure receiving member, and a swing mechanism that is disposed on both the left and right sides of the pressure receiving member and swings the left end portion or the right end portion of the pressure receiving member in the front-rear direction. A pressure-receiving portion that supports the back of the vehicle, and a support portion that extends from the left and right ends of the pressure-receiving portion toward the outside in the left-right direction and the front, and supports the upper body side portion of the occupant. A pressing member that presses the left end portion or the right end portion of the pressure receiving member in the front-rear direction; and a driving source that applies a driving force to the pressing member. The driving source overlaps the support portion when viewed from the front-rear direction. Sea urchin, characterized in that it is arranged on the rear side of the support portion.

  According to this configuration, since the drive source is disposed so as to overlap the support portion when viewed from the front-rear direction, for example, the vehicle seat is compared with a structure where the drive source is disposed so as not to overlap the support portion when viewed from the front-rear direction. It can be made compact in the vertical direction or the horizontal direction.

  In the above-described configuration, it is desirable that the drive source is disposed on the inner side in the left-right direction of the side frame.

  According to this, since the drive source is arranged on the inner side in the left-right direction of the side frame, the vehicle seat can be made compact in the left-right direction compared to a structure in which the drive source is arranged on the outer side in the left-right direction of the side frame. That is, for example, when the drive source is disposed on the outer side in the left-right direction of the side frame, there arises a problem that the vehicle seat is enlarged in the left-right direction. However, the configuration described above solves such a problem. be able to.

  In the above-described configuration, it is preferable that the drive source is formed in a long shape and is arranged so that the longitudinal direction thereof is along the side frame.

  According to this, since the long drive source is arranged along the side frame, for example, compared to a structure in which the long drive source is inclined in the front-rear direction with respect to the side frame, the vehicle seat Can be made compact in the front-rear direction. That is, for example, when a long drive source is tilted in the front-rear direction with respect to the side frame, the drive source protrudes in the front-rear direction from the side frame, and the vehicle seat becomes larger in the front-rear direction. Although a subject arises, according to the composition mentioned above, such a subject can be solved.

  Further, in the above-described configuration, the support portion is disposed so as to face the side frame in the left-right direction, and the drive source is disposed between the side frame and the support portion in the left-right direction. Is desirable.

  According to this, since the drive source is arranged between the support portion and the side frame facing in the left-right direction, for example, the structure in which the support portion and the side frame do not face in the left-right direction or driving between the support portion and the side frame is performed. Compared to a structure in which no source is arranged, the vehicle seat can be made compact in the front-rear direction. That is, for example, when the support portion and the side frame are not opposed to each other in the left-right direction or when the drive source is not disposed between the support portion and the side frame, there is a problem that the vehicle seat is enlarged in the front-rear direction. According to the configuration, such a problem can be solved.

  In the above-described configuration, it is preferable that the front end portion of the support portion extends outward in the left-right direction along the outer surface of the drive source.

  According to this, since the front end portion of the support portion is formed so as to extend outward in the left-right direction along the outer surface of the drive source, for example, compared with a structure in which the front end portion of the support portion extends straight forward obliquely, the vehicle seat It can be made compact in the front-rear direction. That is, for example, when the front end portion of the support portion extends straight forward, there arises a problem that the vehicle seat becomes large in the front-rear direction. According to the configuration described above, such a problem can be solved. Can do.

  In the above-described configuration, it is preferable that a convex portion protruding rearward is formed on the support portion, and the drive source is separated from the convex portion.

  According to this, the rigidity of a support part can be made high by a convex part. Further, since the drive source is separated from the convex portion, it is possible to suppress damage of the drive source due to the convex portion interfering with the drive source, for example, compared to a structure in which the drive source is in contact with the convex portion. That is, when a convex part is not formed in the support part, the problem that the rigidity of a support part becomes low arises, but according to the structure mentioned above, such a problem can be solved. In addition, for example, when the drive source is in contact with the convex portion, there arises a problem that the convex portion interferes with the drive source and the drive source is damaged. According to the configuration described above, such a problem is solved. can do.

  Further, in the above-described configuration, the pressure receiving member further includes a connecting wire that supports the pressure receiving portion and the support portion from the rear side, and both left and right end portions are connected to the pressing member, and the pressure receiving portion and the The support portion is provided with an engaging claw that engages with the connecting wire and is supported by the connecting wire, and the engaging claw provided on the support portion is integrally formed on the convex portion. Is desirable.

  According to this, since the engaging claw is formed on the highly rigid convex portion, the connecting wire engaged with the engaging claw presses the highly rigid convex portion, so that the support portion can be swung well. Can do. That is, for example, when a portion with low rigidity of the support portion is pressed with a connecting wire, there is a possibility that the support portion cannot be favorably swung, but the configuration described above solves such a problem. can do.

  In the above-described configuration, the pressure receiving member further includes a connecting wire that supports the pressure receiving portion from the rear side, and both left and right end portions are connected to the pressing member, and the pressure receiving portion includes the connecting wire. It is desirable that an engaging claw that is engaged with the connecting wire and supported by the connecting wire is provided, and the engaging claw is provided at an end portion on the outer side in the left-right direction of the pressure receiving portion.

  According to this, since the end of the pressure receiving portion on the outer side in the left-right direction can be pressed with the connecting wire, the pressure receiving portion can be favorably swung with the connecting wire. That is, for example, when the engaging claw is provided near the center in the left-right direction of the pressure receiving portion, there is a risk that the pressure receiving portion cannot be favorably swung by the connecting wire. Can solve various problems.

  According to the present invention, since the support portion and the drive source are arranged in a compact manner, the vehicle seat can be made compact.

  Further, according to the present invention, the vehicle seat can be made more compact by disposing the drive source on the inner side in the left-right direction of the side frame.

  Moreover, according to this invention, a vehicle seat can be further compacted by arrange | positioning a elongate drive source along a side frame.

  Further, according to the present invention, the vehicle seat can be further compacted by disposing the drive source between the support portion and the side frame facing in the left-right direction.

  Further, according to the present invention, the vehicle seat can be further compacted by forming the front end portion of the support portion so as to extend outward in the left-right direction along the outer surface of the drive source.

  Moreover, according to this invention, the rigidity of a support part can be made high by a convex part, and it can suppress that a drive source is damaged by separating a drive source from a convex part.

  In addition, according to the present invention, the supporting claw can be favorably swung with the connecting wire by forming the engaging claw on the convex portion having high rigidity.

  Further, according to the present invention, by providing the engagement claw at the outer end in the left-right direction of the pressure receiving part, the pressure receiving part can be favorably swung with the connecting wire.

1 is a perspective view of a vehicle seat as a vehicle seat according to an embodiment. It is a perspective view of a seat frame built in a vehicle seat. It is a front view of the seat back frame which comprises a seat frame. It is an expansion perspective view which shows a rocking | fluctuation mechanism. It is a disassembled perspective view which decomposes | disassembles and shows a rocking | fluctuation mechanism. It is a top view which shows operation | movement of a rocking | fluctuation mechanism. It is explanatory drawing (a)-(c) which shows the motion of the rocking | fluctuation mechanism and pressure receiving member when a vehicle turns right. It is sectional drawing which shows the state which the 2nd link member is contacting the site | part between two 1st beads. It is sectional drawing which shows the form which a 2nd link member contacts a 1st bead. It is an enlarged view which shows the form in which a 1st bead is formed horizontally. It is the enlarged view (a) which shows the form which provided the engaging claw on the 1st bead of a support part, and XX sectional drawing (b) of Fig.11 (a). It is an enlarged view which shows the form which provided the engaging claw in the edge part of the left-right direction outer side of a pressure receiving part.

  Next, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the following description, first, the overall configuration of a vehicle seat as an example of a vehicle seat will be briefly described, and then the characteristic part of the present invention will be described in detail.

  As shown in FIG. 1, the vehicle seat S is a seat used for a driver's seat of an automobile, and mainly includes a seat cushion S1, a seat back S2, and a headrest S3.

  A seat frame F as shown in FIG. 2 is built in the seat cushion S1 and the seat back S2. The seat frame F is mainly composed of a seat cushion frame F1 constituting a frame of the seat cushion S1 and a seat back frame F2 constituting a frame of the seat back S2. The seat cushion S1 is configured by covering a seat cushion frame F1 with a seat cushion pad made of a cushion material such as urethane foam and a skin material made of synthetic leather or fabric, and the seat back S2 is placed on the seat back frame F2. It is configured by covering a seat back pad made of a cushion material and a skin material made of synthetic leather or fabric.

The seat cushion frame F1 is installed on the floor of the automobile via the slide rail SL. Thereby, the vehicle seat S can adjust the front-rear position. The lower portion of the seat back frame F2 is rotatably connected to the rear portion of the seat cushion frame F1 via a reclining mechanism RL. As a result, the seat back S2 can tilt forward and backward with respect to the seat cushion S1.
In this specification, front and rear, left and right, and top and bottom are based on an occupant seated on the vehicle seat S in a state where the seat back S2 is not tilted by the reclining mechanism RL.

  The seat back frame F2 mainly includes an upper frame 10, left and right side frames 20, and a lower frame 30, and the upper frame 10, the left and right side frames 20, and the lower frame 30 are integrally formed by welding or the like. It is formed in a combined frame shape. A pressure receiving member 40 and a pair of left and right swing mechanisms 50, which will be described in detail later, are disposed inside the frame-shaped seat back frame F2. In FIG. 2 and FIG. 3 and the like, the swing mechanism 50 is illustrated in a simplified manner as appropriate.

  The upper frame 10 is made of a pipe material bent in a substantially U shape, and a pair of left and right support brackets 12 for attaching the headrest S3 are fixed to the front side of the horizontal pipe portion 11 extending in the left-right direction by welding. Yes. Further, the left and right vertical pipe portions 13 extending in the vertical direction of the upper frame 10 constitute a left and right side frame 20 integrally with the left and right side frame main body portions 21 coupled to the lower portion thereof.

  The left and right side frame main body portions 21 are formed in a substantially U shape in sectional view by pressing a metal plate or the like, and are arranged to face in the left-right direction. The side frame main body portion 21 is coupled to the vertical pipe portion 13 while holding the vertical pipe portion 13 at the upper portion thereof, and has a protruding portion 22 whose lower portion projects forward from the upper portion. Is formed.

Hereinafter, the pressure receiving member 40 and the swing mechanism 50 will be described in detail.
The pressure receiving member 40 is an elastically deformable plate-shaped member made of resin or the like, and is disposed behind the occupant between the left and right side frames 20. Specifically, as shown in FIG. 3, the pressure receiving member 40 includes a pressure receiving portion 40 </ b> A that supports the occupant's back via the cushion material and the like described above, and a support portion that supports the upper body side portion of the occupant via the cushion material and the like. 41, and an upper connecting wire W1 and a lower connecting wire W2 that support the pressure receiving portion 40A from the rear side.

  The pressure receiving portion 40A is formed with a relatively large area (an area that covers at least 1/3 or more of the internal space of the frame-like seat back frame F2) in order to support the occupant's back on a wide surface, and the seat back S2 It is arrange | positioned in the position corresponding to the center part. And in the pressure receiving part 40A, 2nd bead B2 which protrudes back is formed.

  Specifically, the second bead B2 is formed in a concave shape that is recessed from the front, and mainly includes a plurality of upper and lower bead portions B21 extending in the vertical direction and a plurality of upper and lower bead portions B21 extending in the left-right direction. And a connecting bead portion B22 for connecting the two. By providing the second bead B2 in the pressure receiving portion 40A in this way, it is possible to increase the rigidity of the pressure receiving portion 40A.

  The support part 41 extends from the upper part of the left and right ends of the pressure receiving part 40A, more specifically, from the left and right sides of the part corresponding to the height of the chest of the occupant of the pressure receiving part 40A, toward the diagonally forward outside in the left-right direction. Thus, it is formed integrally with the pressure receiving portion 40A (see FIG. 2). In other words, the support portion 41 is disposed at a position corresponding to the left and right side portions projecting forward from the left and right sides of the central portion of the seat back S2.

  Moreover, the support part 41 is arrange | positioned so as to oppose the side frame 20 in the left-right direction, as shown in FIG. Thereby, compared with the structure where a support part and a side frame do not oppose in the left-right direction, for example, it becomes possible to make vehicle seat S compact in the front-back direction.

  Further, the front end portion of the support portion 41 extends in an arc shape outward in the left-right direction so as to follow a cylindrical outer peripheral surface (outer surface) of an actuator 51 as an example of a drive source described later. Thus, for example, the vehicle seat S can be made compact in the front-rear direction compared to a structure in which the front end portion of the support portion extends straight forward.

  As shown in FIG. 3, the support portion 41 is formed with a first bead B <b> 1 as an example of a convex portion protruding rearward. Thereby, the rigidity of the support part 41 can be increased.

  Specifically, a plurality of first beads B1 are formed at intervals in the vertical direction, and extend from the outer end in the left-right direction of the support portion 41 toward the second bead B2. And the outermost upper and lower bead portions B21) in the left-right direction. Thereby, the rigidity of the boundary part 42 (polygonal line part) of the pressure receiving part 40A and the support part 41 can be increased, and the support part 41 can be prevented from being deformed with respect to the pressure receiving part 40A.

  Further, the first bead B1 is formed obliquely with respect to the horizontal plane. Specifically, the first bead B1 is formed to incline upward from the second bead B2 toward the outside in the left-right direction. Thereby, for example, compared with a structure in which the first bead is formed in a cross shape, it is possible to efficiently receive loads applied from various directions to the support portion 41 from the occupant with a simple structure.

  The upper connecting wire W1 and the lower connecting wire W2 are disposed on the rear side of the pressure receiving portion 40A, and are engaged with engaging claws (not shown) formed in the pressure receiving portion 40A, so that the pressure receiving portion 40A and the support portion 41 are engaged. Is supported so that it can move backward. Specifically, the upper connecting wire W1 has left and right ends connected to a swing mechanism 50, which will be described later, and the lower connecting wire W2 swings rearward with the left and right ends fixed to the inner surface of the side frame body 21. It is connected to a movable wire support arm 23.

  As a result, for example, when a rear impact load is applied from the rear of the vehicle, a leftward and rightward end of the upper connecting wire W1 is applied when a backward load (reverse movement load) is applied to the pressure receiving portion 40A and the support portion 41. When the bent portion of the lower connecting wire W2 is bent by the bending of the wire support arm 23 or the left and right ends of the lower connecting wire W2 are moved rearward, the pressure receiving portion 40A and the support portion 41 are moved rearward. It is possible to absorb the load applied to. The wire support arm 23 is configured to swing backward by a known mechanism using a tension coil spring (not shown) when a backward movement load of a predetermined value or more is applied.

  The swing mechanism 50 is disposed on both the left and right sides of the pressure receiving member 40, and is configured to swing the left end or right end of the pressure receiving member 40 in the front-rear direction. Specifically, the swing mechanism 50 is controlled by a control device (not shown) so as to swing the pressure receiving member 40 in the same direction as the turning direction of the vehicle. The centrifugal force) can be received by the pressure receiving member 40.

  Various methods can be adopted as a control method by the control device. As an example, for example, the lateral acceleration and the turning direction are calculated based on signals from the wheel speed sensor and the steering angle sensor, and when the lateral acceleration exceeds a predetermined threshold, the swinging of the outside in the turning direction is performed. There is a method in which the mechanism 50 is operated and the swing mechanism 50 pushes the outer portion of the pressure receiving member 40 in the turning direction forward.

  4 and 5, the swing mechanism 50 mainly includes an actuator 51, a holding bracket 52, a first link member 53 and a second link member 54 as an example of a pressing member, and a torsion spring 55. And is configured.

  The actuator 51 is a driving source for rotating the first link member 53 and the second link member 54 by applying a driving force, and is formed in a long shape in the vertical direction. Specifically, the actuator 51 includes a stepping motor 51A, a gear box 51B, and an output shaft 51C, and the output shaft 51C is arranged along the vertical direction. The driving force from the stepping motor 51A is decelerated by the gear box 51B and transmitted to the output shaft 51C, so that the output shaft 51C rotates at a predetermined angle.

  And this actuator 51 is arrange | positioned at the back side of the support part 41 so that it may overlap with the support part 41 of the pressure receiving member 40 seeing from the front-back direction, as shown in FIG. Accordingly, for example, the vehicle seat S can be made compact in the vertical direction or the horizontal direction as compared with a structure in which the actuator is disposed so as not to overlap the support portion when viewed from the front-rear direction.

  The actuator 51 is disposed on the inner side in the left-right direction of the side frame 20. Thereby, compared with the structure which arrange | positions an actuator on the left-right direction outer side of a side frame, for example, it is possible to make vehicle seat S compact in the left-right direction.

  Furthermore, the actuator 51 is arranged so that its longitudinal direction is along the side frame 20 (circular tubular vertical pipe portion 13). Thus, for example, the vehicle seat S is moved in the front-rear direction compared to a structure in which a long actuator is inclined with respect to the side frame in a front-rear direction (a structure in which the actuator protrudes front-rear from the side frame). It is possible to make it compact.

  Further, as shown in FIG. 7, the actuator 51 is disposed between the side frame 20 and the support portion 41 in the left-right direction. Thereby, compared with the structure which does not arrange | position a drive source between a support part and a side frame, for example, it is possible to make a vehicle seat compact in the front-back direction.

  Further, the actuator 51 is separated from the first bead B <b> 1 formed on the support portion 41. Thereby, for example, compared with a structure in which the actuator is in contact with the first bead, it is possible to suppress the first bead B1 from interfering with the actuator 51 and damaging the actuator 51.

  As shown in FIGS. 4 and 5, the holding bracket 52 is a substantially semicircular plate-like member, and is welded to the vertical pipe portion 13 (side frame 20) via a mounting surface 52 </ b> A formed in an arc shape. It is fixed by. In addition, the holding bracket 52 is formed with a through hole 52B for allowing the output shaft 51C of the actuator 51 to pass therethrough. An upper end surface 51D of the actuator 51 is fixed to the lower surface of the holding bracket 52 by screws or the like (not shown).

  The first link member 53 is a plate-like member formed in a long shape, and one end thereof is fixed to the output shaft 51C of the actuator 51, so that the other end is centered on the output shaft 51C in the front-rear direction. It can swing (see FIG. 6). That is, the first link member 53 is rotatable with respect to the side frame 20.

  Specifically, a cross-sectional view D-type engagement hole 53A that engages with a cross-sectional view D-type tip of the output shaft 51C is formed at one end of the first link member 53, and the other end side has a first An insertion hole 53 </ b> B into which a stepped bolt 56 and a collar 57 that become the swing center of the two link member 54 are inserted is formed. Further, two rectangular plate-like regulating walls 58 that define the swing range of the second link member 54 are fixed to one end side and the other end side of the insertion hole 53B in the first link member 53, respectively. One rectangular fitting hole 53C is formed.

  Accordingly, it is possible to restrict the second link member 54 from swinging with respect to the first link member 53 with the two restriction walls 58. Further, a fixing hole 53D for fixing one end portion 55A of the torsion spring 55 is formed between the engagement hole 53A and the insertion hole 53B in the first link member 53.

  The second link member 54 is rotatably provided on the first link member 53 by the stepped bolt 56, the collar 57, and the nut 59 described above. Specifically, an insertion hole 54 </ b> A through which the shaft portion 56 </ b> A of the stepped bolt 56 is inserted is formed at one end portion of the second link member 54. On the other hand, the stepped bolt 56 has a shaft portion 56A and a medium diameter portion 56C that has a larger diameter than the shaft portion 56A and a smaller diameter than the head portion 56B.

  The collar 57 is rotatably supported in the insertion hole 53B of the first link member 53, and the cylindrical portion 57A through which the shaft portion 56A of the stepped bolt 56 is inserted, and radially outward from the upper end of the cylindrical portion 57A. And an extending flange portion 57B. The cylindrical portion 57 </ b> A is formed so as to slightly protrude from the lower surface of the first link member 53 in a state where the flange portion 57 </ b> B is in contact with the upper surface of the first link member 53.

  The flange portion 57 </ b> B functions as a retaining member that sandwiches and supports the second link member 54 between the intermediate diameter portion 56 </ b> C of the stepped bolt 56 and suppresses the collar 57 from falling downward from the first link member 53. ing. The nut 59 is fastened to the lower end of the collar 57 by being screwed into the shaft portion 56A (screw portion) of the stepped bolt 56 protruding downward from the lower end of the cylindrical portion 57A of the collar 57. . The nut 59 functions as a retaining member that prevents the collar 57 from being pulled upward from the first link member 53 in a state where the nut 59 is fastened to the collar 57.

  That is, the second link member 54 can swing integrally with the first link member 53 together with the stepped bolt 56, the collar 57 and the nut 59. Further, as shown in FIG. 6, the tip of the upper connecting wire W1 can be rotated at the other end of the second link member 54 (the end opposite to the insertion hole 54A: hereinafter, the tip). A connection hole 54B is formed to engage with.

  As a result, when the first link member 53 swings forward from the rear initial position (solid line position), the upper end of the second link member 54 is restricted from moving outward in the left-right direction by the upper connecting wire W1. Thus, the second link member 54 swings in a direction away (opening) from the first link member 53. When the first link member 53 swings from the front position (the position indicated by the two-dot chain line) to the initial position, the second link member 54 approaches (closes) the first link member 53 by a torsion spring 55 described later. ) Swings in the) direction.

  As shown in FIG. 5, a fixing hole 54 </ b> C for fixing the other end 55 </ b> B of the torsion spring 55 is formed between the insertion hole 54 </ b> A and the connection hole 54 </ b> B in the second link member 54. .

  The torsion spring 55 is disposed between the first link member 53 and the second link member 54 (mechanistically), and generates a biasing force that pulls the first link member 53 and the second link member 54 together. Is configured to do. That is, the torsion spring 55 is configured to bias the second link member 54 to the initial position (position indicated by a solid line in FIG. 6) with respect to the first link member 53. Thereby, the second link member 54 can be returned to the initial position by the urging force of the torsion spring 55.

  Specifically, the torsion spring 55 includes a coil portion 55C, an L-shaped first arm portion 55D extending radially outward from the lower end of the coil portion 55C, and extending radially outward from the upper end of the coil portion 55C. And an L-shaped second arm portion 55E extending downward.

  The coil portion 55 </ b> C of the torsion spring 55 is disposed so as to surround the medium diameter portion 56 </ b> C (the rotation shaft of the second link member 54 on the first link member 53 side). Thus, for example, the swing mechanism 50 can be made more compact than a structure in which the coil portion of the torsion spring is disposed so as not to surround the rotation shaft of the second link member.

  In the swing mechanism 50 configured as described above, as shown in FIGS. 7A to 7C, for example, when the vehicle is turned in the right direction (clockwise in the drawing), the left swing mechanism 50 is used. Oscillates forward, the pressure receiving member 40 oscillates clockwise in the figure. At this time, since the second link member 54 is provided between the tip of the first link member 53 and the upper connecting wire W1, for example, the first link member is used as the upper connecting wire without providing the second link member. Compared to the structure of direct connection, the amount of stroke to the front of the left end of the upper connection wire W1 becomes large. Thereby, since the pressure receiving member 40 swings greatly, the centrifugal force applied to the occupant when the vehicle turns can be favorably received by the pressure receiving member 40.

  Further, the second link member 54 always contacts the support portion 41 of the pressure receiving member 40 from the initial position shown in FIG. 7A until the second link member 54 swings to the foremost position shown in FIG. 7C. It is supposed to be. Thereby, for example, the load applied from the occupant to the support portion 41 can be favorably received by the second link member 54 as compared with a structure in which the load applied from the occupant to the support portion is supported by the upper connecting wire.

  In particular, in the present embodiment, as shown in FIG. 8, the second link member 54 is in contact with a portion between the two first beads B <b> 1 in the support portion 41. Thereby, it can suppress by the two 1st bead B1 that the 2nd link member 54 shifts up and down (the arrangement direction of two 1st bead B1).

According to the above, in addition to the effects described above, the following effects can be achieved.
Since the second link member 54 is connected to the upper connecting wire W1, for example, the structure of the connecting portion can be simplified compared to a structure in which the second link member is connected to the pressure receiving plate.

  Since the upper connecting wire W1 and the second link member 54 are connected by engaging the tip of the upper connecting wire W1 with a connecting hole 54B formed at the tip of the second link member 54, for example, the tip of the upper connecting wire is The structure can be simplified as compared with a structure that is bent in a ring shape and the tip is hooked on a hook-shaped portion formed on the second link member.

  Since the pressure receiving member 40 is configured to be elastically deformable, the pressure receiving member 40 can be fitted to the occupant by elastic deformation, and the centrifugal force applied to the occupant can be received more favorably by the pressure receiving member 40.

  Since the occupant's back is supported by the wide surface of the pressure receiving portion 40A, it is possible to prevent the occupant from feeling uncomfortable on the back as compared to, for example, a conventional structure in which the pressure receiving member is formed in a rectangular bar shape.

  Although the embodiments of the present invention have been described above, the present invention can be implemented with appropriate modifications as shown in other embodiments below. In the following description, components that are substantially the same as those in the above-described embodiment are given the same reference numerals, and descriptions thereof are omitted.

  In the said embodiment, although the 2nd link member 54 was made to contact the site | part between two 1st bead B1 among the support parts 41, this invention is not limited to this, As shown in FIG. The link member 54 may be brought into contact with the first bead B1. According to this, since the 1st bead B1 which is a highly rigid part is supported by the 2nd link member 54, a passenger | crew's load can be favorably received by the 2nd link member 54. FIG.

  In the said embodiment, although 1st bead B1 was formed diagonally with respect to the horizontal surface, this invention is not limited to this, As shown in FIG. 10, 1st bead B1 is formed along the direction parallel to a horizontal surface. May be. In this case, it is desirable to arrange the swing mechanism 50 so that the output shaft 51C of the actuator 51 is along the vertical direction, as in the above embodiment.

  That is, it is desirable that the second link member 54 is configured to be rotatable in a horizontal plane. According to this, as shown in the figure, for example, when the second link member 54 is in contact with the first bead B1, it is possible to prevent the rotating second link member 54 from being detached from the first bead B1. Therefore, the first bead B1 can be reliably supported by the second link member 54. For example, when the 2nd link member contacts the part between a plurality of 1st beads, it can control more that the 2nd link member removes from between the 1st beads.

  In the embodiment, the engaging claws (not shown) that are engaged with the connecting wires W1 and W2 and supported by the connecting wires W1 and W2 are formed in the pressure receiving portion 40A, but the present invention is not limited to this. For example, as shown in FIG. 11A, an engaging claw H1 that engages with the upper connecting wire W1 may be formed on the support portion 41 in addition to the pressure receiving portion 40A.

  In this case, it is desirable that the engaging claw H1 is integrally formed on the first bead B1, as shown in FIG. According to this, by forming the engaging claw H1 on the first bead B1 having high rigidity, the upper connecting wire W1 engaged with the engaging claw H1 presses the first bead B1 having high rigidity. The part 41 can be swung favorably.

  Specifically, the engaging claw H1 is formed in an L shape in sectional view by a base portion H11 extending rearward from the first bead B1 and a claw portion H12 extending downward from the rear end of the base portion H11. It is formed so as to extend below the lower edge B11 of the first bead B1. According to this, since the claw part H12 extends below the lower edge B11 of the first bead B1, it is possible to prevent the upper connecting wire W1 from being detached from the engagement claw H1.

  Also, as shown in FIG. 12, it is desirable that the engaging claws H1 provided in the pressure receiving portion 40A be provided adjacent to an end portion (boundary portion 42 with the support portion 41) on the outer side in the left-right direction of the pressure receiving portion 40A. According to this, since the upper end of the pressure receiving portion 40A in the left-right direction can be pressed by the upper connecting wire W1, the pressure receiving portion 40A can be favorably swung by the upper connecting wire W1.

  In the above-described embodiment, the outer surface shape of the drive source (actuator 51) is a cylindrical shape, but the present invention is not limited to this, and may be, for example, a polygonal shape. In this case, the support portion may be formed along the outer surface of the polygonal drive source.

  In the said embodiment, although the pressure receiving part 40A and the support part 41 were integrally formed, this invention is not limited to this, A pressure receiving part and a support part may each be comprised as a different body.

  In the said embodiment, although concave shape (hollow) 1st bead B1 was illustrated as a convex part, this invention is not limited to this, For example, a solid-shaped protrusion may be sufficient.

  In the said embodiment, although the press member which presses the left end part or right end part of the pressure receiving member 40 in the front-back direction was comprised by the two link members 53 and 54, this invention is not limited to this, One or three or more You may comprise a press member with this link member. Further, the pressing member is not limited to the link member that swings with respect to the side frame, and may be a member that is movable in the front-rear direction with respect to the side frame, for example.

  In the embodiment, the second link member 54 is always brought into contact with the support portion 41 of the pressure receiving member 40 until the second link member 54 swings from the initial position to the foremost position. However, the present invention is not limited to this. The second link member 54 only needs to be configured to come into contact with the support portion 41 at least at the position where the pressure receiving member 40 swings forward most. Even in this case, since the support portion 41 is supported by the second link member 54 at the position where the pressure receiving member 40 is swung forward most, the second link member 54 applies centrifugal force applied to the occupant when the vehicle turns. Can receive well.

  In the above embodiment, the two link members are urged by the torsion spring 55, but the present invention is not limited to this, and other urging members such as a leaf spring and a wire spring may be used.

  The specific configuration of the seat frame F (the seat cushion frame F1 and the seat back frame F2) shown in the embodiment is an example, and the present invention is not limited to the configuration of the embodiment. For example, in the above-described embodiment, the left and right side frames 20 of the seat back frame F2 are configured by the pipe-shaped vertical pipe portion 13 and the plate-shaped side frame main body portion 21, but are not limited thereto. The side frame may be composed of only a pipe-shaped frame or may be composed of only a plate-shaped frame.

  In the said embodiment, although the vehicle seat S used by a motor vehicle was illustrated as a vehicle seat, this invention is not limited to this, For example, the sheet | seat used for a ship, an aircraft, etc. It can also be applied to.

20 side frame 40 pressure receiving member 40A pressure receiving portion 41 support portion 50 swing mechanism 51 actuator 53 first link member 54 second link member S vehicle seat S1 seat cushion S2 seat back

Claims (8)

A vehicle seat comprising a seat cushion and a seat back, and having left and right side frames constituting left and right frames of the seat back,
A pressure receiving member disposed behind the occupant between the left and right side frames;
A swing mechanism that is disposed on both the left and right sides of the pressure receiving member and swings the left end or the right end of the pressure receiving member in the front-rear direction;
The pressure receiving member is
A pressure receiving part that supports the back of the occupant;
A support portion that extends from the left and right ends of the pressure receiving portion toward the outside in the left-right direction and the front, and supports the upper body side of the occupant,
The swing mechanism is
A pair of pressing members arranged on the left and right, pressing the left end or the right end of the pressure receiving member in the front-rear direction; and
A pair of drive sources provided corresponding to each of the pressing members, and applying a driving force to each of the pressing members,
Each of the driving sources is supported by the side frame . A vehicle seat comprising a seat cushion and a seat back, and having left and right side frames constituting left and right frames of the seat back,
A pressure receiving member disposed behind the occupant between the left and right side frames;
A swing mechanism that is disposed on both the left and right sides of the pressure receiving member and swings the left end or the right end of the pressure receiving member in the front-rear direction;
The pressure receiving member is
A pressure receiving part that supports the back of the occupant;
A support portion that extends from the left and right ends of the pressure receiving portion toward the outside in the left-right direction and the front, and supports the upper body side of the occupant,
The swing mechanism is
A pair of pressing members arranged on the left and right, pressing the left end or the right end of the pressure receiving member in the front-rear direction; and
A pair of drive sources provided corresponding to each of the pressing members, and applying a driving force to each of the pressing members,
Each of the drive sources is disposed between the side frame and the support portion in the left-right direction,
Each of the driving sources is formed in a long shape, and is arranged so that the longitudinal direction thereof is along the longitudinal direction of the side frame . A vehicle seat comprising a seat cushion and a seat back, and having left and right side frames constituting left and right frames of the seat back,
A pressure receiving member disposed behind the occupant between the left and right side frames;
A swing mechanism that is disposed on both the left and right sides of the pressure receiving member and swings the left end or the right end of the pressure receiving member in the front-rear direction to change the direction of the pressure receiving member left and right ;
The pressure receiving member is
A pressure receiving part that supports the back of the occupant;
A support part that extends from the left and right ends of the pressure receiving part toward the outside in the left-right direction and the front, and supports the upper body side part of the occupant;
And a convex portion that extends from the pressure receiving portion so as to straddle the support portion .
A pressing member for pressing the support portion in the front-rear direction;
Vehicle seat, characterized in that to obtain Bei and a driving source providing a driving force to the pressing member. A vehicle seat comprising a seat cushion and a seat back, and having left and right side frames constituting left and right frames of the seat back,
A pressure receiving member disposed behind the occupant between the left and right side frames;
A swing mechanism that is disposed on both the left and right sides of the pressure receiving member and swings the left end or the right end of the pressure receiving member in the front-rear direction;
The pressure receiving member is
A pressure receiving part that supports the back of the occupant;
A support portion that extends from the left and right ends of the upper portion of the pressure receiving portion toward the outside in the left-right direction and the front, and supports the upper body side portion of the occupant,
The swing mechanism is
A pressing member that presses the left end or the right end of the pressure receiving member in the front-rear direction;
A driving source for applying a driving force to the pressing member,
The drive source is disposed on the rear side of the support portion and on the outer side in the left-right direction of the lower portion where the support portion of the pressure receiving portion does not extend so as to overlap the support portion when viewed from the front-rear direction. A vehicle seat characterized by A vehicle seat comprising a seat cushion and a seat back, and having left and right side frames constituting left and right frames of the seat back,
A pressure receiving member disposed behind the occupant between the left and right side frames;
A swing mechanism that is disposed on both the left and right sides of the pressure receiving member and swings the left end or the right end of the pressure receiving member in the front-rear direction;
The pressure receiving member is
A pressure receiving part that supports the back of the occupant;
A support portion that extends from the left and right ends of the pressure receiving portion toward the outside in the left-right direction and the front, and supports the upper body side of the occupant,
The support portion is formed with a convex portion protruding backward,
The swing mechanism is
A pressing member that presses the left end or the right end of the pressure receiving member in the front-rear direction;
A driving source for applying a driving force to the pressing member,
The drive source is disposed on the rear side of the support portion so as to overlap the support portion when viewed from the front-rear direction ,
The drive source is separated from the convex part,
The pressure receiving member further includes a connecting wire that supports the pressure receiving portion and the support portion from the rear side, and that both right and left end portions are connected to the pressing member,
The pressure receiving part and the support part are provided with engagement claws that engage with the connection wire and are supported by the connection wire,
An engagement claw provided on the support portion is integrally formed on the convex portion. A vehicle seat comprising a seat cushion and a seat back, and having left and right side frames constituting left and right frames of the seat back,
A pressure receiving member disposed behind the occupant between the left and right side frames;
A swing mechanism that is disposed on both the left and right sides of the pressure receiving member and swings the left end or the right end of the pressure receiving member in the front-rear direction;
The pressure receiving member is
A pressure receiving part that supports the back of the occupant;
A support portion that extends from the left and right ends of the pressure receiving portion toward the outside in the left-right direction and the front, and supports the upper body side of the occupant,
The swing mechanism is
A pressing member that presses the left end or the right end of the pressure receiving member in the front-rear direction;
A driving source for applying a driving force to the pressing member,
The drive source is disposed on the rear side of the support portion so as to overlap the support portion when viewed from the front-rear direction ,
The pressure receiving member further includes a connecting wire that supports the pressure receiving portion from the rear side, and that both right and left ends are connected to the pressing member,
The pressure receiving portion is provided with an engaging claw that engages with the connecting wire and is supported by the connecting wire,
The vehicle seat according to claim 1, wherein the engagement claw is provided at an end portion on the outer side in the left-right direction of the pressure receiving portion. The vehicle seat according to any one of claims 1 to 6, wherein the driving source is disposed on the inner side in the left-right direction of the side frame. The vehicle seat according to any one of claims 1 to 7 , wherein a front end portion of the support portion extends outward in the left-right direction along the outer surface of the drive source.

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