JP6114245B2 - 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, as a vehicle seat for a vehicle or the like, a seat configured to turn a part of the seat back in the turning direction in order to favorably support the centrifugal force applied to the occupant during turning at the seat back is known. (See Patent Document 1). Specifically, this structure is arranged between the left and right side frames of the seat back, a long link member that is disposed between the left and right side frames and supports the occupant via the movable cushion, and rotates to each side frame. And a short link member that is connected to both ends of the long link member, and the direction of the movable cushion is changed when the link operates.

  In addition, the vehicle seat includes a pressure receiving member that is disposed between the left and right side frames and receives a load from an occupant. A structure is known in which the upper body of the occupant is sunk into the seat back by the pressure receiving member moving backward due to the load from the occupant at the time of a rear collision that collides with a structure (Patent Document). 2). According to this structure, the occupant's head can be quickly brought close to the headrest and received by the headrest, so that the impact applied to the occupant's neck during a rear-end collision can be mitigated.

Japanese Patent No. 4569293 JP 2012-136063 A

  By the way, in the prior art, when trying to realize both the function of suitably supporting the occupant at the time of turning and the function of reducing the impact at the time of the rear collision, a mechanism for changing the direction of a part of the seat back to the vehicle seat, It is necessary to provide both of the mechanisms that allow the pressure receiving member to move backward. Then, since these mechanisms occupy the space in the seat back, it becomes difficult to arrange other mechanisms or to make the seat compact, so the degree of freedom in designing the vehicle seat is increased. There may be restrictions.

This invention is made | formed in view of the above background, and it aims at providing the vehicle seat which can improve the freedom degree of design.
Another object of the present invention is to prevent the pressure receiving member from moving backward when a rear collision does not occur.
Another object of the present invention is to favorably support an occupant on a pressure receiving member during turning.
Another object of the present invention is to suppress the pressure receiving member from moving forward due to the reaction when the pressure receiving member moves backward.
Another object of the present invention is to reduce the amount of deformation of a member that connects the link member and the pressure receiving member, or to suppress an increase in size.
Another object of the present invention is to stably move the pressure receiving member.
Moreover, an object of this invention is to suppress the rotation of a link member too much.

The present invention for achieving the above-described object is a vehicle seat including a seat cushion and a seat back, and includes a left and right side frame constituting left and right frames of the seat back, and the left and right side frames. A pressure receiving member that receives a load from an occupant, and is arranged on both the left and right sides of the pressure receiving member, and moves the left end or the right end of the pressure receiving member from an initial position to a forward advance position, or the advance position A drive mechanism for moving the connection mechanism to the initial position, and the drive mechanism includes a connection mechanism connected to the pressure receiving member, and a drive source for operating the connection mechanism. The pressure receiving member is activated when a load greater than or equal to a predetermined value is input from the occupant to move the pressure receiving member to a backward position behind the initial position. It is characterized in. The coupling mechanism is activated when a load greater than or equal to a predetermined value is input to the pressure receiving member by the occupant to move the pressure receiving member to a retracted position behind the initial position, and the pressure receiving member is moved to the retracted position. It can be set as the structure which keeps.

  According to such a configuration, the drive mechanism moves the left end portion or the right end portion of the pressure receiving member back and forth during turning and supports the occupant appropriately, and the occupant moves the pressure receiving member to the retracted position during a rear collision. Both functions of mitigating the impact on the neck of the body can be realized. This eliminates the need to provide both a mechanism for changing the direction of the seat back and a mechanism for allowing the pressure receiving member to move backward, so that another mechanism can be arranged while securing a space in the seat back. The seat can be made compact, and the degree of freedom in designing the vehicle seat can be improved.

  In the above-described vehicle seat, the connection mechanism is provided so as to be pivotable back and forth with respect to the left and right side frames, and includes a link member connected to the pressure receiving member, and the vehicle seat includes the pressure receiving member. When a load less than a predetermined value is input from the occupant, the link member is prevented from rotating rearward, and when a load greater than a predetermined value is input from the occupant to the pressure receiving member, the link member is deformed to the rear of the link member. It can be set as the structure provided with the rotation resistance member which enables this rotation.

  According to this, it is possible to suppress the pressure receiving member from moving to the retracted position when the rear collision does not occur (normal time).

In the vehicle seat described above, the rotation resistance member may include a connection wire that connects the pressure receiving member and the link member.
Further, in the vehicle seat described above, the rotation resistance member may include a biasing member that biases the link member toward the side that rotates forward.

  In the vehicle seat described above, the connection mechanism includes a second link member connected to the output shaft of the drive source, and the link member is provided to be rotatable with respect to the second link member. It can be set as the structure currently provided.

  According to this, since it becomes possible to secure the amount of movement of the pressure receiving member as compared with the case where the pressure receiving member is moved between the initial position and the forward movement position with one link member, the occupant is placed on the pressure receiving member during turning. It can be favorably supported.

  The vehicle seat described above may be configured to include a second urging member that urges the link member to the side that is rotated later in a state where the pressure receiving member is in the retracted position.

  According to this, since the pressure receiving member that has moved to the retracted position due to the rear collision can remain at the retracted position, it is possible to suppress the pressure receiving member from moving forward due to the reaction when moving to the retracted position.

  In the vehicle seat described above, the connecting portion between the link member and the pressure receiving member may be arranged in front of the rotation center of the link member in a state where the pressure receiving member is in the initial position. it can.

  According to this, since it becomes possible to urge the link member to the side to be rotated forward by the rotation resistance member, it is possible to suppress the pressure receiving member from moving to the retracted position at the normal time.

  In the vehicle seat described above, the connecting portion between the link member and the pressure receiving member may be arranged behind the rotation center of the link member in a state where the pressure receiving member is in the retracted position. .

  According to this, since the link member can be biased to the side to be rotated later by the rotation resistance member in a state where the pressure receiving member is in the retracted position, the pressure receiving member moved to the retracted position by the rear collision is retracted. It can be made to stay in a position, and it can control that a pressure receiving member moves ahead by reaction when it moves to a retreat position.

  In the vehicle seat described above, the connecting portion between the link member and the pressure receiving member is the second link member as viewed from the rotation axis direction of the link member with the pressure receiving member in the initial position. The rotation center of the second link member and the rotation center of the second link member to the rotation center of the link member are arranged inside a circle having a radius.

  According to this, the deformation amount of the member connecting the link member and the pressure receiving member when the pressure receiving member moves to the retracted position is reduced, or the enlargement of the member connecting the link member and the pressure receiving member is suppressed. Can do.

  In the vehicle seat described above, the connecting portion between the link member and the pressure receiving member is disposed on the outer side in the left-right direction with respect to the rotation center of the link member in a state where the pressure receiving member is in the initial position. can do.

  According to this, since it becomes difficult for the link member to rotate backward, the pressure receiving member can be stably moved when the pressure receiving member is moved from the initial position to the forward movement position.

  The vehicle seat described above may include a stopper that abuts when the pressure receiving member moves to the retracted position and restricts the amount of rotation of the link member.

  According to this, it can suppress that a link member rotates back too much. As a result, for example, it is possible to adjust the amount of occupant sinking into the seatback or to easily return the pressure receiving member moved to the retracted position to the initial position.

  According to the present invention, the drive mechanism can achieve both the function of favorably supporting the occupant during turning and the function of mitigating the impact applied to the occupant's neck at the time of a rear collision, so the degree of freedom in designing the vehicle seat Can be improved. In addition, a space in the seat back can be secured, and the seat can be made compact.

  Moreover, according to this invention, it is set as the structure provided with the rotation resistance member which controls the rotation to the back of the link member of a connection mechanism at normal time, and suppresses that a pressure receiving member moves to a retreat position at normal time. be able to.

  Further, according to the present invention, the movement mechanism of the pressure receiving member is ensured by configuring the coupling mechanism to have the second link member and to rotate the link member with respect to the second link member. Therefore, the occupant can be favorably supported by the pressure receiving member during turning.

  In addition, according to the present invention, by including the second urging member, the pressure receiving member that has moved to the retracted position can remain at the retracted position, and the pressure receiving member can move forward due to the recoil of the backward movement. Can be suppressed.

  According to the present invention, the link member is arranged by the rotation resistance member by disposing the connecting portion between the link member and the pressure receiving member in front of the rotation center of the link member in a state where the pressure receiving member is in the initial position. Since it is possible to urge toward the side that pivots forward, it is possible to suppress the pressure receiving member from moving to the retracted position during normal times.

  Further, according to the present invention, the connecting portion between the link member and the pressure receiving member is disposed behind the rotation center of the link member in a state where the pressure receiving member is in the retracted position, so that the link member is moved backward by the rotation resistance member. Since it is possible to bias the rotating side, it is possible to suppress the pressure receiving member from moving forward due to the reaction of the backward movement.

  According to the present invention, the connecting portion between the link member and the pressure receiving member is centered on the rotation center of the second link member with the pressure receiving member in the initial position, and from the rotation center of the second link member. By disposing the link member inside the circle whose radius is the length to the rotation center of the link member, the amount of deformation of the member connecting the link member and the pressure receiving member when the pressure receiving member moves to the retracted position is reduced. An increase in size can be suppressed.

  Further, according to the present invention, the link member is rotated rearward by arranging the connecting portion between the link member and the pressure receiving member at the outer side in the left-right direction with respect to the rotation center of the link member in a state where the pressure receiving member is at the initial position. Since it becomes difficult to move, the pressure receiving member can be stably moved from the initial position to the advanced position.

  In addition, according to the present invention, it is possible to prevent the link member from rotating too far backward by including a stopper that abuts when the pressure receiving member moves to the retracted position and restricts the amount of rotation of the link member. can do.

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. They are the perspective view (a) which shows the connection structure of the side frame of a seat back, and a lower connection wire, and XX sectional drawing (b) of (a). It is a perspective view of the drive mechanism seen from the rear side. It is a perspective view of the drive mechanism seen from the front side. It is a disassembled perspective view of a drive mechanism. It is the side view (a) of a drive source, and YY sectional drawing of (a). It is an enlarged plan view of a drive mechanism. It is sectional drawing of an abutment link member. It is explanatory drawing (a)-(c) of operation | movement of the drive mechanism at the time of right turn. It is explanatory drawing (a), (b) of operation | movement of the drive mechanism and pressure receiving member at the time of right turn. It is a figure which shows a pressure receiving member when a drive mechanism is located in an advance position at the time of right turn. It is a figure which shows the positional relationship in the up-down direction of a seat back pad and a support part. It is explanatory drawing (a)-(c) of operation | movement of the drive mechanism at the time of a rear collision. It is explanatory drawing (a)-(c) of operation | movement of the drive mechanism and pressure receiving member at the time of a rear collision. It is sectional drawing of the contact link member which concerns on a modification. They are the top view (a) and sectional drawing (b) which show the cover member in a 1st modification, a contact link member, and an upper connection wire. It is sectional drawing which shows the positional relationship of the contact link member in a 2nd modification, a pressure receiving member, and a side frame. It is sectional drawing which shows the upper connection wire and pressure receiving member in a 3rd modification. It is a figure which shows the positional relationship of the drive source and torsion spring in a 4th modification. It is the front view (a) which shows the pressure receiving member and seat back frame in a 5th modification, and sectional drawing (b) of a pressure receiving member. It is a front view which shows the pressure receiving member in a 6th modification. It is the side view (a) which shows the seat back frame in a 7th modification, and the front view (b) which shows a pressure receiving member and a seat back frame. It is a front view which shows the pressure receiving member and seat back frame in an 8th modification. It is a perspective view which shows the side frame, 2nd bracket, and drive source in a 9th modification. It is the perspective view (a) which shows the side frame and drive source in a 10th modification, and sectional drawing (b) of the left end part of a seat back.

Next, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate.
As shown in FIG. 1, the vehicle seat according to the present embodiment is configured as a vehicle seat S used for a driver's seat of an automobile, and mainly includes a seat cushion S1, a seat back S2, and a headrest S3. I have.

  A seat frame F as a frame 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 the seat cushion frame F1 with a cushion material made of urethane foam or the like and a skin material made of synthetic leather or fabric, and the seat back S2 is made of urethane foam or the like on the seat back frame F2. The seat back pad BP (see FIG. 12A) made of a cushion material and a skin material are covered.

  The seat back frame F2 mainly includes an upper frame 10, left and right side frames 20 constituting the left and right frames of the seat back S2, and a lower frame 30. The upper frame 10 and the left and right side frames 20 The lower frame 30 is formed in a frame shape integrally joined by welding or the like.

  The upper frame 10 is made of a pipe material bent into a substantially U shape, and a support bracket 12 for attaching the headrest S3 is fixed to the horizontal pipe portion 11 extending in the left-right direction by welding. The left and right vertical pipe portions 13 extending in the vertical direction of the upper frame 10 are integrally formed with the left and right side frame body portions 21 coupled to the lower portion thereof by welding or the like to form the left and right side frames 20. Yes.

  The left and right side frame main body portions 21 are arranged to face each other in the left-right direction. Each side frame main body 21 has a pair of front and rear bent portions 21A in which both ends in the front-rear direction, which is the short direction, are bent inward in the left-right direction by pressing a metal plate or the like. It is formed in a letter shape. In addition, each side frame main body 21 is coupled to the vertical pipe portion 13 with the vertical pipe portion 13 held at the upper portion thereof, and an overhang portion that protrudes forward from the upper portion to the lower portion thereof. It is formed in a shape having 22.

  As shown in FIG. 3, a pressure receiving member 40 as a movable member and a pair of left and right drive mechanisms 50 are disposed between the left and right side frames 20. Further, the vehicle seat S includes a control device 80 (see FIG. 5) for controlling the drive mechanism 50 (drive source 52) inside or outside thereof.

  The pressure receiving member 40 is a member that receives a load from an occupant seated on the vehicle seat S through the skin material and the seat back pad BP, and is formed so as to be elastically deformable from resin or the like, and is a pressure receiving portion that faces the occupant's back 41 and left and right support portions 42 that extend obliquely forward to the outside in the left-right direction from the upper portions of the left and right ends of the pressure receiving portion 41 are integrally configured. The pressure receiving member 40 includes a lower portion of the pressure receiving portion 41, and includes a first portion 40A that supports the waist of the occupant, an upper portion of the pressure receiving portion 41, and left and right support portions 42, and is located above the first portion 40A. The second portion 40B that supports the occupant and the center portion in the vertical direction of the pressure receiving portion 41, and the third portion 40C that connects the first portion 40A and the second portion 40B.

  The third portion 40 </ b> C is provided at the center in the left-right direction of the pressure receiving member 40. The width in the left-right direction of the third portion 40C is smaller than the width in the left-right direction of the first portion 40A and the second portion 40B. That is, the pressure receiving member 40 has a shape in which the central portion in the vertical direction is constricted by the third portion 40C.

  The width in the left-right direction of the first portion 40A is larger than the width of the third portion 40C. Thus, by increasing the width in the left-right direction of the first portion 40A, it is possible to stably support the occupant's waist with the first portion 40A.

  In the pressure receiving member 40, a first bead B1 protruding rearward is formed in the pressure receiving portion 41, and a second bead B2 protruding rearward is formed in each support portion 42. By providing the beads B1 and B2 to the pressure receiving member 40 in this way, the rigidity of the pressure receiving member 40 can be increased.

  The first bead B1 is formed in a concave shape that is recessed when viewed from the front. The first bead B1 includes a plurality of upper and lower bead portions B11 extending in the up-down direction on the third portion 40C and a connecting bead portion B12 extending in the left-right direction and connecting the plurality of upper and lower bead portions B11. Each upper and lower bead portion B11 extends from the second portion 40B through the third portion 40C to the first portion 40A. Further, the upper and lower bead parts B11 arranged on the outermost side in the left-right direction extend to the second part 40B, and the upper end part is arranged on the upper part of the second part 40B.

  The second bead B2 is formed in a concave shape that is recessed from the front. A plurality of second beads B2 are formed at intervals in the vertical direction, extend from the end on the outer side in the left-right direction of the support portion 42 toward the first bead B1, and are arranged on the outermost side in the left-right direction. It is formed to be connected to. Thereby, it is possible to increase the rigidity of the boundary part (polygonal line part) between the pressure receiving part 41 and the support part 42.

  Further, the second bead B2 is formed obliquely with respect to the horizontal plane. Specifically, the second bead B2 is formed to incline upward from the first bead B1 toward the outer side in the left-right direction.

  Further, at the boundary portion between the pressure receiving portion 41 and the support portion 42, a relief portion 44 having a recessed rear surface is formed at a position corresponding to an upper connecting wire W1 described later (see also FIG. 5). In the present embodiment, the escape portion 44 is provided at a position overlapping the second bead B2 provided at the central portion in the vertical direction.

  The pressure receiving member 40 is connected to the left and right side frames 20 so as to move back and forth via an upper connecting wire W1 and a lower connecting wire W2 which are elastic members.

  The upper connecting wire W <b> 1 extends from the one support portion 42 to the other support portion 42 on the rear side of the pressure receiving member 40. That is, the upper connecting wire W1 is provided so as to hold the second portion 40B from the rear from the left end portion to the right end portion of the second portion 40B. Further, the upper connecting wire W1 is bent so that the central portion in the left-right direction is convex downward. Specifically, the upper connecting wire W1 is provided corresponding to the upper portion of the pressure receiving portion 41, and has a bent portion W11 having a U-shape that protrudes downward, and from the left and right ends of the bent portion W11 outward in the left-right direction. And a side portion W12 extending toward the surface. The lower end portion of the bent portion W11 is positioned below the contact portion (the escape portion 44) of the upper connecting wire W1 with the pressure receiving member 40, specifically, at substantially the same height as the lower end of the support portion 42. Yes. Both ends of the upper connecting wire W1 are connected to the driving mechanism 50 fixed to the side frame 20, and by engaging engaging claws (not shown) formed at the upper part of the rear surface of the pressure receiving member 40, The upper part of the pressure receiving member 40 is connected to the left and right side frames 20.

  Both ends of the lower connecting wire W2 are connected to wire attachment portions 23 (see FIG. 4) provided on the side frame 20, and engaging claws (not shown) formed at the lower portion of the rear surface of the pressure receiving member 40 are provided. By engaging, the lower part of the pressure receiving member 40 is connected to the left and right side frames 20.

  As shown in FIGS. 4A and 4B, the wire attachment portion 23 is formed by bending a metal plate or the like, and the fixing piece 23A is fixed to the left and right sides of the side frame main body portion 21 by welding or screws. It is fixed to the inner surface. The wire attachment portion 23 includes a fixed piece 23A, a connecting piece 23B extending inward in the left-right direction from the upper end portion of the fixed piece 23A, and an engaging piece 23C extending upward from an end portion in the left-right direction of the connecting piece 23B. ing. The engaging piece 23C is formed with a substantially elliptical long hole 23D that is long in the front-rear direction, and the end of the lower connecting wire W2 is engaged with the long hole 23D, whereby the lower connecting wire W2 is It is connected to the side frame 20. In addition, a resin spacer 23E is engaged with the long hole 23D on the front side of the lower connecting wire W2, thereby restricting the lower connecting wire W2 from moving back and forth in the long hole 23D.

  As shown in FIG. 12A, the seat back pad BP is provided on the left and right sides of the pad center portion BP1 facing the pressure receiving portion 41 and on the left and right sides of the pad center portion BP1 and protrudes left and right before the pad center portion BP1. Pad side part BP2.

  The pad side portion BP2 extends from the pad central portion BP1 to the outside in the left-right direction along the support portion 42 of the pressure receiving member 40, then extends to the rear through the left-right direction outside of the side frame 20, and further, the side frame 20 The rear side extends inward in the left-right direction. The pad side portion BP2 is formed with a space between the support portion 42 of the pressure receiving member 40 and the side frame 20, so that the driving mechanism 50 disposed in the space does not contact the seat back pad BP. It has become.

  A first hanging groove BP3 is provided between the pad center portion BP1 and the pad side portion BP2. The first hanging groove BP3 is a groove that is recessed when viewed from the front, and extends in the vertical direction. The first suspension groove BP3 is provided with a skin attachment member (not shown) arranged vertically at the bottom for suspending the skin material of the seat back S2. The first hanging groove BP3 is provided at a position overlapping the left and right ends of the pressure receiving member 40 when viewed from the front-rear direction. That is, the pressure receiving member 40 is provided from the inside to the outside of the first hanging groove BP3 in the left-right direction, and the support portion 42 is provided on the outside in the left-right direction of the first hanging groove BP3.

  Further, as shown in FIG. 14, the pad center portion BP1 is provided with a pair of second suspension grooves BP4 at a substantially center portion in the vertical direction. The second hanging groove BP4 is a groove that is recessed when viewed from the front, and extends in the left-right direction. And the 2nd hanging groove BP4 is provided with the skin attachment member which is not shown in figure in the left-right direction in order to suspend the skin material of seat back S2. The pair of second suspension grooves BP4 are provided at a position above and below the support portion 42 of the pressure receiving member 40, respectively. That is, the support part 42 and the upper connecting wire W1 are provided at the same height as the part between the pair of second hanging grooves BP4. In the present embodiment, the entire support portion 42 is provided at the same height as the portion between the pair of second suspension grooves BP4, but only a part of the support portion 42 is a pair of second suspension. It may be provided at the same height as the portion between the recessed grooves BP4.

  As shown in FIG. 3, the drive mechanism 50 is a mechanism for operating the pressure receiving member 40, is provided on each of the left and right side frames, and is disposed on both the left and right sides of the pressure receiving member 40. As will be described in detail later, the drive mechanism 50 moves the left end or right end of the pressure receiving member 40 from the initial position shown in FIG. 12A to the forward position shown in FIG. It is configured to move (return) to the right or left, or from the advance position to the initial position. Further, the drive mechanism 50 (the coupling mechanism 51) operates when a predetermined load or more is input to the pressure receiving member 40 from the occupant, and the pressure receiving member 40 is rearward of the initial position shown in FIG. It is configured to move to the retracted position shown in (c).

  As shown in FIG. 5, the drive mechanism 50 mainly includes a connection mechanism 51 connected to the pressure receiving member 40 via the upper connection wire W <b> 1 and a drive source 52 for operating the connection mechanism 51. Has been. Since the left and right drive mechanisms 50 are substantially symmetrical, the following description will be made in detail mainly with reference to the configuration of the left drive mechanism 50.

  As shown in FIGS. 6 and 7, the drive source 52 mainly includes a motor 52 </ b> A, a gear box 52 </ b> B, and an output shaft 52 </ b> C, and is fixed to the side frame 20 via a bracket 60. Further, the drive source 52 is disposed at a position where it does not contact the pressure receiving member 40.

  The width of the motor 52A in the left-right direction and the front-rear direction is smaller than that of the gear box 52B arranged on the upper portion thereof. That is, the lower part (motor 52A) of the drive source 52 is thinner than the upper part (gear box 52B).

The gear box 52B is a member that houses a gear (not shown) for decelerating the rotational driving force generated by the motor 52A. The gear box 52B has a substantially cylindrical box body 310 and an upper end portion of the box body 310 (the axial direction of the output shaft 52C). And a lid member 320 for closing the end portion. Three fastening portions 330 projecting outward in the radial direction of the output shaft 52C are provided on the side surfaces of the box body 310 and the lid member 320. The fastening portions 330 are portions where screws 91 as fastening members for fastening the box main body 310 and the lid member 320 are disposed, and are disposed at equal intervals in the circumferential direction of the side surface of the gear box 52B.
The output shaft 52C is a shaft for outputting the rotational driving force decelerated by the gear box 52B, and is disposed so as to penetrate the lid member 320.

Here, the structure of the bracket 60 for fixing the drive source 52 (drive mechanism 50) to the side frame 20 will be described.
The bracket 60 is composed of a first bracket 61 and a second bracket 62. Each of the first bracket 61 and the second bracket 62 is formed in a substantially L shape in sectional view by bending a metal plate or the like, and mainly includes engaging portions 61A and 62A and fixing portions 61B and 62B. Have.

  The engaging portion 61A of the first bracket 61 is a portion that engages with the upper end portion (lid member 320) of the gear box 52B that is one end portion in the axial direction of the drive source 52, and has a substantially disk shape having a hole for engagement. Is formed. The fixing portion 61B is a portion that is fixed to the side frame 20, and the lower side that is the other end in the axial direction of the drive source 52 from the end on the outer side in the left-right direction (side frame 20 side) of the engaging portion 61A. It is formed so as to extend along the side frame 20 toward the upper side on the opposite side. The fixing portion 61B is provided with a round hole 61H through which a bolt 92 for fixing the first bracket 61 to the side frame 20 is passed.

  The engaging portion 62A of the second bracket 62 is a portion that engages with the motor 52A of the drive source 52, and is formed in a substantially rectangular frame shape. The fixing portion 62B is a portion fixed to the side frame 20, and is formed so as to extend along the side frame 20 from the end portion on the outer side in the left-right direction of the engaging portion 62A toward the lower side. As shown in FIG. 8A, the fixing portion 62B has an extending portion 62C that extends to the outside of the front side (a direction orthogonal to the axial direction) of the drive source 52 when the side frame 20 is viewed from the inner side in the left-right direction. doing. The extending part 62C is provided with a round hole 62H (see FIG. 7) through which a bolt 93 for fixing the second bracket 62 to the side frame 20 is passed.

  As shown in FIG. 7, the first bracket 61 is driven when the engaging portion 61A engages with the upper end portion of the gear box 52B and is fastened to the gear box 52B by three bolts 94 (only one is shown). The second bracket 62 is attached to the drive source 52 by engaging the engaging portion 62A with the motor 52A and fastening the second bracket 62 to the gear box 52B with three screws 95 (only one shown). ing. As shown in FIG. 8A, the fixing portion 61B is fixed to the side frame 20 by the bolt 92, and the fixing portion 62B is fixed to the side frame 20 by the bolt 93 by the extension portion 62C. 52 is fixed to the side frame 20.

  In the present embodiment, when the side frame 20 shown in FIG. 8A is viewed from the side where the driving source 52 is fixed, the fixing portion 61B and the extending portion 62C do not overlap the driving source 52 (the driving source 52). Therefore, the bracket 60 can be easily attached to the side frame 20 by the bolts 92 and 93. Thereby, the drive source 52 can be easily fixed to the side frame 20. Further, the drive source 52 can be stably fixed to the side frame 20 by the two first brackets 61 and the second bracket 62.

  The extending portion 62 </ b> C has a front end portion, which is a part of the extending portion 62 </ b> C, disposed on the protruding portion 22 of the side frame 20. Thereby, since it is not necessary to provide the side frame 20 with a special portion for disposing the extending portion 62C protruding forward from the drive source 52, the configuration of the side frame 20 can be simplified. The periphery of the drive source 52 can be made compact.

  As shown in FIG. 8B, the driving source 52 fixed to the side frame 20 via the bracket 60 has three fastening portions 330 as viewed from the axial direction of the output shaft 52C. Are disposed at positions avoiding the straight line LN indicated by the alternate long and short dash line connecting the ends of the pair of bent portions 21A. More specifically, the fastening part 330 is arranged at least one on each side of the straight line LN as viewed from the axial direction, specifically, one on the outer side in the left-right direction of the straight line LN and two on the inner side in the left-right direction of the straight line LN. Has been.

  The first bracket 61 (engaging portion 61A) is formed in such a dimension that the end 61E on the inner side in the left-right direction does not protrude inward in the left-right direction from the end 52E on the inner side in the left-right direction of the drive source 52 when viewed from the axial direction. Thereby, since the 1st bracket 61 does not jump out to a passenger | crew side, the periphery of the drive source 52 can be made into a compact structure.

  As shown in FIG. 7, the coupling mechanism 51 is provided so as to be rotatable in the front-rear direction with respect to the side frame 20, and two links for operating the pressure receiving member 40, specifically, a second link. It mainly has a drive link member 100 as an example of a member and an abutment link member 200 as an example of a link member.

  The drive link member 100 is a member formed in a long plate shape from metal or the like, and includes a shaft hole 110 provided at one end portion, a pin hole 120 provided at the other end portion, and a stopper portion 130. Has mainly. The drive link member 100 has a shaft hole 110 connected to the output shaft 52C of the drive source 52 by serration fitting or the like, and is fastened by an E-ring 53 so as not to come out of the output shaft 52C. As a result, the drive link member 100 is provided so as to rotate substantially back and forth when the drive source 52 is driven.

  The stopper portion 130 is a portion that abuts against a member fixed to the side frame 20, specifically, a fixed stopper member 70 described later and restricts the rotation of the drive link member 100 itself. More specifically, the stopper portion 130 includes a first stopper portion 131 that restricts rotation to the side that rotates in front of the drive link member 100 (one direction), and a side that rotates after the drive link member 100 (one 2nd stopper part 132 which regulates rotation to the direction opposite to the direction).

  As shown in FIG. 9, each of the first stopper portion 131 and the second stopper portion 132 is an outer peripheral portion of the drive link member 100 when viewed from the rotation axis direction of the drive link member 100 (the axial direction of the output shaft 52C). In other words, it is provided in the contour portion. Furthermore, the first stopper portion 131 and the second stopper portion 132 are provided on the side surface 102 that surrounds the output shaft 52 </ b> C that is the rotation shaft of the drive link member 100. Specifically, the first stopper portion 131 is directed substantially forward from the front side of the elongated body portion 101 when the drive link member 100 is in the posture shown in FIG. 9 (when the pressure receiving member 40 is in the initial position). The surface which protrudes and contacts the fixed stopper member 70 is provided so as to be substantially flat. Further, the second stopper portion 132 is provided so as to protrude substantially leftward from the rear side of the main body portion 101 and have a substantially flat surface in contact with the fixed stopper member 70.

Here, the configuration of the fixed stopper member 70 will be described.
The fixed stopper member 70 is a member that restricts the rotation of the drive link member 100 when the stopper portion 130 abuts, and is fixed to the side frame 20. More specifically, the fixed stopper member 70 is disposed between the output shaft 52C and the side frame 20, and is opened inward in the left-right direction, which is the side where the drive link member 100 is disposed, when viewed from the axial direction of the output shaft 52C. It has a U shape. The fixed stopper member 70 is fixed to the side frame 20 via the first bracket 61 by fixing a base portion 72 opposite to the U-shaped end portion 71 to the first bracket 61 by welding or the like.

  The fixed stopper member 70 has a rotation restricting portion 73 with which the stopper portion of the drive link member 100 can abut on the end portion 71. Each rotation restricting portion 73 has a substantially rectangular cylindrical shape that can be engaged with the end portion 71 and is made of resin. The drive link member 100 is restricted from turning forward by the first stopper 131 coming into contact with the front turning restricting portion 73 (see FIG. 11C), and the second stopper. When the part 132 is in contact with the rear side rotation restricting part 73, the rotation to the side to be rotated later is restricted. Since the rotation restricting portion 73 is formed of resin, the contact noise between the stopper portion 130 and the fixed stopper member 70 can be suppressed, and the operation sound of the drive link member 100 can be suppressed.

  Further, each rotation restricting portion 73 is disposed within a substantially circular outline of the drive source 52 when viewed from the axial direction of the output shaft 52C. Thereby, since the enlargement of the drive link member 100 which has the stopper part 130 which can contact | abut to the rotation control part 73 in the side surface 102 can be suppressed, the drive link member 100 can be made into a compact structure.

  The output shaft 52C is disposed to face the opening 74 of the U-shaped fixed stopper member 70 when viewed from the axial direction. Thereby, since the drive link member 100 and the fixed stopper member 70 can be disposed close to the left and right direction, the periphery of the drive link member 100 can be made compact.

  The stopper portion 130 has a length from the rotation center C1 to the rotation center C2 of the abutment link member 200 with the rotation center C1 of the drive link member 100 as the center, as viewed from the axial direction of the output shaft 52C. It arrange | positions inside the circle C shown with the dashed-dotted line made into a radius. Thereby, since the enlargement of the drive link member 100 can be suppressed, the drive link member 100 can have a compact configuration.

  In the present embodiment, the left and right drive link members 100 are composed of common parts. Specifically, the drive link member 100 constituting the left drive mechanism 50 shown in FIG. 9 is configured so that the right drive mechanism 50 can also be used by reversing the front and back sides. This configuration is possible because the stopper portion 130 is not provided on the side surface 102 of the plate-like drive link member 100 and protrudes only on one side in the axial direction. is there. By sharing parts, it is possible to reduce the number of parts and the trouble of parts management, so that the cost can be reduced. Further, it is possible to prevent the right and left parts from being mixed and to facilitate assembly.

  As shown in FIG. 7, the contact link member 200 is a member formed in an elongated shape, and includes a stopper 210 and a pin hole 220 provided at one end portion, and a contact portion 230 provided at the other end portion. And a through-hole 240 provided between the pin hole 220 and the contact portion 230. The contact link member 200 is provided so as to be able to rotate substantially forward and backward with respect to the drive link member 100 by engaging the pin 54 with the pin hole 220 and the pin hole 120 of the drive link member 100. Further, the contact link member 200 is connected to the pressure receiving member 40 via the upper connection wire W1 by inserting the end portion of the upper connection wire W1 into the through hole 240.

  The contact portion 230 is a portion that contacts the pressure receiving member 40 when the pressure receiving member 40 is operated by the drive source 52. As shown in FIG. 9, the contact portion 230 has a convex curved surface shape when viewed from the rotation axis direction of the contact link member 200, and further, a direction orthogonal to the rotation axis direction as shown in FIG. 10. As seen from the above, it has a convex curved surface shape. More specifically, the contact portion 230 has a substantially spherical shape.

  The pressure receiving member 40 has a gap with the contact portion 230 when no load is input from the occupant at the initial position indicated by the solid line in FIG. 9 (when no occupant is seated on the vehicle seat S). When the occupant is seated on the vehicle seat S and a load is input from the occupant at the initial position, the support portion 42 is deformed as indicated by a two-dot chain line to the contact portion 230. Abut. As a result, the pressure receiving member 40 can be deformed and moved until the pressure receiving member 40 hits the contact portion 230, so that the cushioning property of the seat back S2 can be improved. The pressure receiving member 40 has a contacted surface 43 with which the contact portion 230 can contact the rear surface of the support portion 42, and the contacted surface 43 is a rotation shaft of the contact link member 200. It has a concave curved surface shape when viewed from the direction.

  Further, the support portion 42 is provided with the relief portion 44, so that the first support portion 45 extending diagonally to the left from the pressure receiving portion 41 and the first support portion 45 at the same height as the upper connecting wire W <b> 1. And a second support portion 46 that extends further diagonally to the left from the outer end in the left-right direction. The abutted surface 43 is provided on the second support portion 46. The upper connecting wire W1 is bent at a portion corresponding to the space between the pressure receiving portion 41 and the first support portion 45, and is continuously in contact with the pressure receiving portion 41 and the first support portion 45.

  As shown in FIGS. 12A and 12B, the contact portion 230 of the contact link member 200 is applied to the pressure receiving member 40 at a position on the outer side in the left-right direction with respect to the hanging groove BP3 of the seat back pad BP. It is provided so as to contact the contact surface 43. The seat back pad BP is thin at a portion where the hanging groove BP3 is provided, and is easily deformed at the thin portion. Therefore, when the contact part 230 pushes the support part 42 of the pressure receiving member 40 forward, the pad side part BP2 of the seat back pad BP can be pushed forward with a light force.

  Returning to FIG. 9, the stopper 210 is a portion that abuts against the side surface 102 of the drive link member 100 and regulates the amount of rotation to the side that rotates after the contact link member 200 (FIGS. 11C and 15). (See (c)). The stopper 210 protrudes from one end portion of the contact link member 200 and is bent from the tip of the protruding portion to the lower side where the drive link member 100 is disposed.

  As shown in FIG. 10, the abutment link member 200 includes a link body 201 formed in a long plate shape and a covering member 202 that covers the entire link body 201. The link body 201 and the covering member 202 are formed of different materials. Specifically, in the abutment link member 200, the link main body 201 is formed of metal and the covering member 202 is formed of resin by insert molding or the like. The through hole 240 is provided so as to penetrate the link body 201 and the covering member 202. The contact portion 230 is provided on the covering member 202 and is configured as a part of the covering member 202. Thereby, the contact part 230 is formed from resin.

  As shown in FIG. 9, the contact link member 200 is formed such that the length from the rotation center C2 to the contact portion 230 is longer than the length from the rotation center C2 to the rotation center C1 of the drive link member 100. Has been.

  As shown in FIGS. 6 and 7, a torsion spring 55 as an urging member is disposed between the drive link member 100 and the contact link member 200. The torsion spring 55 is a member that biases the contact link member 200 forward (one direction), and is a drive source 52 on the contact link member 200, that is, with respect to the contact link member 200. 55A, a coil portion 55A disposed on the opposite side of the coil portion, a substantially L-shaped first arm portion 55B extending radially outward from the upper end of the coil portion 55A and extending downward, and radially extending from the lower end of the coil portion 55A. And an L-shaped second arm portion 55C extending outward and extending downward.

  In the torsion spring 55, the coil portion 55A is engaged with the pin 54, and as shown in FIG. 9, the first arm portion 55B, which is one end thereof, is hooked on the first stopper portion 131 of the drive link member 100, and the other end The second arm portion 55 </ b> C is hooked on the stopper 210 of the contact link member 200. Thereby, the torsion spring 55 generates an urging force for rotating the contact link member 200 in the direction indicated by the arrow in FIG.

  The torsion spring 55 and the upper connecting wire W1 as the connecting wire are members that restrict the rearward rotation of the abutment link member 200, in other words, members that serve as resistance to the rearward rotation (rotation resistance member). It is functioning. Specifically, the torsion spring 55 urges the contact link member 200 toward the front rotation side, thereby restricting the contact link member 200 from rotating backward.

  The upper connecting wire W1 is bent at both left and right end portions obliquely forward, and the end portion extending downward is connected to the through hole 240 of the contact link member 200. The contact link member 200 is connected. And the connection part C3 of the contact link member 200 and the pressure receiving member 40 is a front end part of the contact link member 200 in a state where the pressure receiving member 40 is in the initial position shown in FIG. 9, more specifically, the contact link member 200. The upper connecting wire W1 biases the abutting link member 200 toward the side that pivots forward, thereby moving the abutting link member 200 to the rear. Is restricted.

  The coil portion 55A of the torsion spring 55 is provided at a position facing the escape portion 44 of the pressure receiving member 40 (see FIG. 5). Thereby, it is possible to suppress the generation of abnormal noise when the pressure receiving member 40 is bent, and to effectively use the space.

  The coil portion 55 </ b> A of the torsion spring 55 is provided so as to overlap a part of the drive source 52, specifically, the fastening portion 330 when viewed in the vertical direction. As a result, the drive mechanism 50 can be downsized in the horizontal direction. The coil portion 55A is disposed away from the upper connecting wire W1. Thereby, when the upper connecting wire W1 moves rearward, it is possible to suppress the upper connecting wire W1 from biting into the coil portion 55A.

  The connecting portion C3 is disposed inside a circle C indicated by a one-dot chain line when the pressure receiving member 40 is in the initial position shown in FIG. 9 when viewed from the rotation axis direction of the contact link member 200. Further, the connecting portion C3 is disposed on the outer side in the left-right direction with respect to the rotation center C2 of the contact link member 200 in a state where the pressure receiving member 40 is in the initial position.

  The drive mechanism 50 described above is provided so that the left and right operate independently of each other. Specifically, the drive source 52 is controlled by the control device 80 so that the left and right are driven independently of each other, and the drive link member 100 and the contact link member 200 of the coupling mechanism 51 are independent of each other on the left and right. It is provided so that rotation is possible. That is, in the drive mechanism 50, for example, when the left drive link member 100 and the contact link member 200 rotate, the right drive link member 100 and the contact link member 200 also rotate in conjunction with each other. It is not configured.

  As shown in FIG. 5, the control device 80 is configured to turn the pressure receiving member 40 in the seat back S2 in the turning direction by controlling the drive of the drive source 52 (motor 52A) (FIG. 5). 13). Various methods can be adopted as the control method by the control device 80. 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 the calculated lateral acceleration has a predetermined threshold value. When exceeding, the motor 52A of the drive mechanism 50 outside the turning direction is driven, and thereby the direction of the pressure receiving member 40 is directed to the turning direction.

  In the present embodiment, the control device 80 monitors the current flowing through the motor 52A while the motor 52A is being driven, and stops energization of the motor 52A when the current flowing through the motor 52A exceeds a predetermined value set in advance. Thus, the driving of the motor 52A is stopped. When the drive link member 100 rotates and the stopper portion 130 comes into contact with the fixed stopper member 70, the motor 52A stops and the current flowing through the motor 52A increases. The control device 80 stops energization of the motor 52A by detecting this state. Thereby, the stopper part 130 can be made to function suitably with a simple structure, and the rotation amount of the drive link member 100 can be prescribed | regulated accurately.

Next, operations of the drive mechanism 50 and the pressure receiving member 40 when the vehicle is turning will be described.
When the vehicle turns to the right, the control device 80 drives the drive source 52 of the left drive mechanism 50. Then, from the state shown in FIG. 11A, as shown in FIGS. 11B and 11C, the drive link member 100 rotates forward, and the abutment link member 200 moves relative to the drive link member 100. Move forward while rotating. As a result, the left end portion (connecting portion C3) of the upper connecting wire W1 moves forward, and the left support portion 42 (left end portion) of the pressure receiving member 40 is moved from the initial position to the forward advance position.

  Then, when the first stopper portion 131 of the drive link member 100 abuts against the rotation restricting portion 73 on the front side of the fixed stopper member 70, the rotation of the drive link member 100 is restricted, and the stopper 210 of the contact link member 200. Is brought into contact with the side surface 102 of the drive link member 100, whereby the rotation of the contact link member 200 is restricted. At this time, since the current flowing through the drive source 52 exceeds a predetermined value, the control device 80 stops the drive of the drive source 52.

  As a result, as shown in FIGS. 12A, 12B, and 13, the pressure receiving member 40 moves to the right, which is the turning direction as a whole, as the left end moves from the initial position to the advanced position. Become. As a result, the centrifugal force applied to the occupant during turning can be suitably supported by the seat back S2.

  Specifically, as shown in FIG. 3, when the support portion 42 of the pressure receiving member 40 moves from the initial position to the advanced position, the lower portion of the pressure receiving portion 41, that is, the first portion 40 </ b> A is fixed to the side frame 20. Since it is supported by the lower connecting wire W2 (at least not moved by the operation of the drive mechanism 50), it does not move in the front-rear direction. Therefore, the pressure receiving member 40 is twisted at the third portion 40C between the first portion 40A and the second portion 40B having the support portion 42. In the present embodiment, since the width of the third portion 40C in the left-right direction is smaller than that of the first portion 40A and the second portion 40B, the pressure receiving member 40 is easily twisted at the third portion 40C. Thereby, the support part 42 can move smoothly between the initial position and the advance position.

  Since the first bead B1 is provided in the third portion 40C, it is possible to suppress the pressure receiving member 40 from being plastically deformed when twisted. And since 1st bead B1 is extended in the up-down direction, the twist in the 3rd part 40C of the pressure receiving member 40 is not inhibited.

  In addition, since the first portion 40A and the second portion 40B are connected by the third portion 40C, when the support portion 42 moves as compared with the configuration in which the first portion 40A and the second portion 40B are not connected. It can reduce the discomfort experienced by the passengers.

  In this embodiment, since the coupling mechanism 51 is composed of two drive link members 100 and a contact link member 200, the upper link wire W1 is attached to one link member, for example, the drive link member 100 shown in FIG. Compared to the case of directly connecting and moving the pressure receiving member 40 back and forth, the amount of stroke before and after the left end portion of the upper connecting wire W1 can be increased. Thereby, since the movement amount (inclination amount) of the pressure receiving member 40 can be ensured, the centrifugal force applied to the occupant by the pressure receiving member 40 during turning can be better supported.

  In the present embodiment, the connecting portion C3 is disposed on the outer side in the left-right direction with respect to the rotation center C2 with the pressure receiving member 40 in the initial position, and the contact link member 200 is moved forward by the upper connecting wire W1 or the like. Since it is urged | biased by the side to rotate, the contact link member 200 becomes difficult to rotate back. Thereby, when the pressure receiving member 40 is moved from the initial position to the advanced position, the tip end of the contact link member 200 does not fluctuate, so that the pressure receiving member 40 can be moved stably.

  In the present embodiment, as shown in FIG. 11C, in the forward movement position, the contact link member 200 has an end portion 231 on the outer side in the left-right direction of the contact portion 230 and the support portion 42 of the pressure receiving member 40. The posture is such that it is positioned on the outer side in the left-right direction from the left-right end 49. Thereby, since the contact link member 200 supports the end portion of the support portion 42 of the pressure receiving member 40, the pressure receiving member 40 can be stably supported by the contact link member 200.

  In the forward position, the connection portion C3 between the contact link member 200 and the upper connection wire W1 connects the contact portion 230 and the contact P between the pressure receiving member 40 and the rotation center C2 of the contact link member 200. It is located outside the line L1 in the left-right direction. Thereby, since the pressure receiving member 40 can be supported from the outside as much as possible by the contact link member 200, the pressure receiving member 40 can be stably supported by the contact link member 200.

  In the forward position, the rotation center C2 of the contact link member 200 connects the contact portion 230, the contact P of the pressure receiving member 40, and the axis C4 of the drive source 52 (the rotation center of the drive link member 100). It is located on the inner side in the left-right direction than the second virtual line L2. Accordingly, it is possible to prevent the contact link member 200 from over-rotating in the clockwise direction in FIG. 11 when a load is applied from the occupant to the left support portion 42 of the pressure receiving member 40 at the forward movement position. it can.

  In the present embodiment, as shown in FIG. 13, the contact link member 200 is moved to a position where the contact P between the contact link member 200 and the pressure receiving member 40 is positioned forward of the front end of the side frame 20 in the forward movement position. 200 rotates. As a result, a sufficient amount of forward pushing of the contact link member 200 can be ensured.

  As shown in FIGS. 12 and 13, the drive mechanism 50 is provided in a space formed between the pressure receiving member 40 of the seat back pad BP and the side frame 20, and even if the contact link member 200 rotates, Since the contact link member 200 does not contact the seat back pad BP, it is possible to prevent the contact link member 200 from coming into contact with the seat back pad BP and generating abnormal noise.

  Further, as shown in FIG. 14, the seat back pad BP is thin at a portion where the pair of second hanging grooves BP4 is provided, and a portion between the pair of second hanging grooves BP4 is bent. It has become easier. Since the support portion 42 and the upper connection wire W1 of the pressure receiving member 40 are provided at the same height as the portion between the pair of second hanging grooves BP4, the support portion 42 and the upper connection wire W1 move. In addition, the seat back pad BP is easily deformed in accordance with the movement.

  When the vehicle returns from the turning state to the straight traveling state, the control device 80 drives the drive source 52 of the left drive mechanism 50 in the direction opposite to that during turning. Then, as shown in FIGS. 11B and 11A, the drive link member 100 rotates backward from the state shown in FIG. Then, the contact link member 200 moves backward while rotating with respect to the drive link member 100 due to a load applied to the pressure receiving member 40 from the occupant. As a result, the left end portion of the upper connecting wire W1 moves rearward, and the left support portion 42 of the pressure receiving member 40 is moved from the advance position to the initial position.

  The rotation of the drive link member 100 is restricted by the second stopper portion 132 of the drive link member 100 coming into contact with the rotation restricting portion 73 on the rear side of the fixed stopper member 70. At this time, since the current flowing through the drive source 52 exceeds a predetermined value, the control device 80 stops the drive of the drive source 52. As a result, the pressure receiving member 40 returns from the state facing right as shown in FIG. 12C to the state facing forward as shown in FIG.

  On the other hand, when the vehicle turns to the left, the control device 80 drives the drive source 52 of the right drive mechanism 50. Subsequent operations of the pressure receiving member 40 and the right driving mechanism 50 are the same as in the case of right-turning, and thus detailed description thereof is omitted.

  In the present embodiment, the pressure-receiving member 40 has the contact surface 43 abutted against the contact portion 230 after an occupant sits on the vehicle seat S and contacts the contact portion 230 of the contact link member 200. It arrange | positions so that it may contact | abut in the whole range of the rotation range of the contact link member 200. FIG. Accordingly, the rotation of the contact link member 200 is guided by the pressure receiving member 40, so that the contact link member 200 can be operated smoothly.

  Moreover, in this embodiment, since the contact part 230 and the pressure receiving member 40 are formed from resin, the sliding contact sound and abrasion with the contact link member 200 and the pressure receiving member 40 can be suppressed. Furthermore, since the contacted surface 43 has a concave curved surface shape, the contact pressure between the contact portion 230 and the contacted surface 43 is lowered, so that the wear of the contact link member 200 and the pressure receiving member 40 is further suppressed. Can do.

  Next, the operation of the drive mechanism 50 and the pressure receiving member 40 at the time of rear collision will be described. Here, the time of a rear collision is a time when another vehicle collides with the rear part of the host vehicle or when the rear part of the host vehicle that moves backward collides with another vehicle or a structure.

  As shown in FIG. 15 (a), when the pressure receiving member 40 is in the initial position and the rear collision does not occur, it is normal (when a load less than a predetermined value is input from the occupant to the pressure receiving member 40). Since the rearward rotation of the contact link member 200 is restricted by the connecting wire W1 or the like, the pressure receiving member 40 does not move greatly backward from the initial position.

  On the other hand, when a rear collision occurs and a large load greater than or equal to a predetermined value is input to the pressure receiving member 40 from the occupant, the pressure receiving member 40 moves rearward due to the large load, and the end portion of the upper connecting wire W1 is brought into contact with the contact link member. 200 (connecting part C3) is pulled backward. Then, as shown in FIG. 15B, the abutment link member 200 rotates backward while elastically deforming the upper connecting wire W1 and the pressure receiving member 40 inward in the left-right direction, whereby the pressure receiving member 40 is further moved rearward. And move from the initial position to the retracted position shown in FIG. Then, when the pressure receiving member 40 moves to the retracted position, the stopper 210 of the contact link member 200 contacts the side surface 102 of the drive link member 100, whereby the rotation of the contact link member 200 is restricted, and the pressure receiving member 40. This also restricts the backward movement.

  As shown in FIGS. 16A to 16C, when the pressure receiving member 40 moves from the initial position to the retracted position, the upper body of the occupant sinks into the seat back S2. As a result, the head of the occupant can be quickly brought close to the headrest S3 and received by the headrest S3, so that the impact applied to the occupant's neck during a rear-end collision can be reduced.

  In this embodiment, when the contact link member 200 includes the stopper 210, it is possible to prevent the contact link member 200 from rotating too far backward. Thereby, for example, it is possible to adjust the sinking amount of the occupant into the seat back S2, and to easily return the pressure receiving member 40 moved to the retracted position to the initial position.

  As shown in FIG. 15C, the connecting portion C3 is disposed behind the rotation center C2 of the contact link member 200 in a state where the pressure receiving member 40 is in the retracted position. At this time, the upper connecting wire W1 functions as a member that urges the contact link member 200 in the direction indicated by the arrow, specifically, a member (second urging member) that urges the contact link member 200 toward the side that rotates later. To do. Thereby, since the pressure receiving member 40 moved to the retracted position by the rear collision can be kept at the retracted position, it is possible to suppress the pressure receiving member 40 from moving forward due to the reaction when moving to the retracted position.

  In the present embodiment, the pressure receiving member 40 does not contact the drive source 52 while the pressure receiving member 40 moves from the initial position to the retracted position and while moving from the initial position to the advanced position. Thereby, it is possible to suppress the generation of abnormal noise when the pressure receiving member 40 moves.

  According to the vehicle seat S described above, the drive mechanism 50 changes the direction of the pressure receiving member 40 when turning and supports the occupant appropriately, and the occupant moves the pressure receiving member 40 to the retracted position during a rear collision. Both functions of mitigating the applied impact can be realized. This eliminates the need to provide both a mechanism for changing the direction of the pressure receiving member and a mechanism for enabling the pressure receiving member to move backward in the seat back S2, thereby securing a space in the seat back S2 and arranging other mechanisms. Or the vehicle seat S can be made compact, and the degree of freedom in designing the vehicle seat S can be improved.

  Further, by providing the upper connecting wire W1 or the torsion spring 55 as a rotation resistance member that serves as a resistance to the rearward rotation of the contact link member 200, it is possible to suppress the pressure receiving member 40 from moving to the retracted position at the normal time. can do.

  Further, since the connecting portion C3 is disposed inside the circle C with the pressure receiving member 40 in the initial position, the deformation amount of the upper connecting wire W1 when the pressure receiving member 40 moves to the retracted position is reduced, The enlargement of the upper connecting wire W1 can be suppressed.

  Further, since the contact portion 230 having a convex curved surface shape when viewed from the rotation axis direction is provided at the tip of the contact link member 200, the contact portion 230 and the pressure receiving member in the rotation direction of the contact link member 200 are provided. And the contact link member 200 and the pressure receiving member 40 can be operated smoothly during turning and rear collision. Further, since the contact portion 230 has a convex curved surface shape when viewed from the direction orthogonal to the rotation axis direction, the sliding resistance can be reduced also in the rotation axis direction of the contact link member 200. For example, the pressure receiving member 40 The pressure receiving member 40 and the like can be operated smoothly when the valve moves up and down. Furthermore, since the abutting portion 230 has a substantially spherical shape, the sliding resistance can be reduced in all directions, and when the abutting link member 200 and the pressure receiving member 40 abut on each other, the abutting link member 200 or the like is performed. It can be operated smoothly.

  Further, since the upper connection wire W1 is connected to the contact link member 200 by being inserted through the through hole 240, the contact link member 200 and the upper connection wire W1 can be easily connected.

  Also, as shown in FIG. 11, the drive link member 100 has a stopper portion 130, and the stopper portion 130 abuts on the fixed stopper member 70, thereby restricting the rotation of the drive link member 100. Compared with the configuration in which the rotation amount of the link member is defined by driving and stopping the stepping motor, the rotation amount of the drive link member 100 can be defined with high accuracy. Further, the amount of rotation of the drive link member 100 can be accurately defined with a simple and low-cost configuration as compared with the case of using a stepping motor. Moreover, since the stopper part 130 has the 1st stopper part 131 and the 2nd stopper part 132, in the case where both the case where the drive link member 100 rotates in one direction, and the case where it rotates in a reverse direction, the rotation amount Can be defined with high accuracy.

  Further, since both the drive mechanism 50 (drive link member 100) and the fixed stopper member 70 are fixed to the bracket 60, the positional accuracy between the stopper portion 130 and the fixed stopper member 70 can be improved, and the drive link member The amount of rotation of 100 can be defined with higher accuracy.

  In addition, since the fixed stopper member 70 is disposed between the output shaft 52C and the side frame 20, an increase in size of the drive link member 100 or the fixed stopper member 70 can be suppressed, and the periphery of the drive link member 100, specifically, The configuration for defining the rotation of the drive link member 100 can be a compact configuration. In addition, since the length of the protruding stopper portion 130 can be shortened because the drive link member 100 and the configuration for defining the rotation can be made compact, the load when the stopper portion 130 contacts the fixed stopper member 70 can be reduced. can do.

  Moreover, since the stopper part 130 is provided in the side surface 102 of the drive link member 100, the structure of the drive link member 100 can be simplified compared with the structure in which the stopper part protrudes from the link member in the rotation axis direction. . Further, since the first arm portion 55B of the torsion spring 55 is hooked to the first stopper portion 131, compared with a configuration in which a portion for hooking the torsion spring is provided at a location different from the stopper portion, The configuration of the drive link member 100 can be simplified. As a result, the drive link member 100 can be easily manufactured.

  Further, as shown in FIG. 8B, in the gear box 52 </ b> B, the fastening portion 330 protrudes, so that the side surface of the gear box 52 </ b> B excluding the fastening portion 330 is recessed with respect to the fastening portion 330. Therefore, the drive source 52 including the gear box 52B can be made compact. Further, since the protruding fastening portion 330 is arranged at a position avoiding the straight line LN, the side surface of the gear box 52B excluding the fastening portion 330 and the end portion of the bent portion 21A of the side frame 20 can be placed close to each other. Therefore, the enlargement of the side frame 20 can be suppressed, and the periphery of the drive source 52 can be made compact. Further, by arranging two fastening portions 330 on the outer side in the left-right direction of the straight line LN and two on the inner side in the left-right direction of the straight line LN, the side surface of the gear box 52B and the bent portion 21A can be provided even in a configuration having a plurality of fastening portions 330. Since the end portions can be arranged close to each other, the periphery of the drive source 52 can be made compact.

  Although the embodiment has been described above, the present invention is not limited to the embodiment. About a concrete structure, it can change suitably in the range which does not deviate from the meaning of invention as follows.

  In the above-described embodiment, the stopper 210 that regulates the amount of rotation of the contact link member 200 is provided on the contact link member 200 itself. However, the present invention is not limited thereto, and the stopper may be, for example, a drive link member, a bracket, or a side. It may be provided on a frame or the like.

  In the embodiment, the contact link member 200 is provided so that the covering member 202 covers the entire link body 201, but is not limited thereto. For example, as shown in FIG. 17, the covering member 202 may be provided so as to cover only a part of the link body 201. Supplementally, the abutting link member 200 shown in FIG. 17 is attached so that one end of a metal link main body 201 is covered with a resin covering member 202 provided with an abutting portion 230. Yes. In such a configuration, it is possible to prevent the covering member 202 from falling off by inserting the upper connecting wire W <b> 1 into the through hole 240 that penetrates the link main body 201 and the covering member 202. In the contact link member 200 shown in FIG. 17, the minimum diameter of the through hole 242 of the covering member 202 is formed smaller than the minimum diameter of the through hole 241 of the link body 201. As a result, the upper connecting wire W1 inserted through the through-hole 240 hits the inner peripheral surface of the through-hole 242 of the resin-made covering member 202, so that the contact sound between the contact link member 200 and the upper connecting wire W1 is reduced. Occurrence can be suppressed.

  In the embodiment, the contact link member 200 includes the link main body 201 and the covering member 202, and the link main body 201 and the covering member 202 are formed of different materials. However, the present invention is not limited to this. For example, the contact link member may be entirely formed of resin. Note that, as in the above-described embodiment, the contact link member 200 includes the link body 201 and the covering member 202 provided with the contact portion 230, so that the link body 201 and the covering member 202 are provided. Each of these can be formed from materials that are optimal in function. For example, as in the above-described embodiment, the link main body 201 is made of metal and the covering member 202 is made of resin, so that the rigidity of the entire contact link member 200 is secured and the contact link member 200 and the pressure receiving member 40 are secured. It is possible to suppress the sliding contact noise and to suppress wear.

  In the embodiment, the contact portion 230 has a substantially spherical shape. However, the present invention is not limited thereto. For example, the contact portion has a convex curved surface shape only when viewed from the rotation axis direction of the link member. It may be a simple configuration. Moreover, the cross-sectional shape of the contact portion is not limited to a circular shape (arc shape), and may be an oval shape or an elliptical shape.

  In the above-described embodiment, the stopper 130 of the drive link member 100 is configured to abut against the fixed stopper member 70 fixed to the side frame 20 to restrict the rotation of the drive link member 100. However, the present invention is not limited to this. Is not to be done. For example, the stopper portion may be configured to directly contact the side frame and restrict the rotation of the link member.

  In the above-described embodiment, the stopper portion 130 is provided on the side surface 102 of the drive link member 100. However, the present invention is not limited to this. For example, the stopper portion is provided so as to protrude from the drive link member in the rotation axis direction. It may be. Moreover, in the said embodiment, although the stopper part 130 had the two 1st stopper parts 131 and the 2nd stopper part 132, it is not limited to this, For example, the stopper part may be one. . Moreover, in the said embodiment, although the drive link member 100 was comprised as a common component by right and left, it is not limited to this, You may be comprised as a left or right exclusive component.

  In the embodiment, the fixed stopper member 70 is fixed to the bracket 60. However, the present invention is not limited to this. For example, the fixed stopper member may be directly fixed to the side frame. Moreover, in the said embodiment, although the whole rotation control part 73 was formed from resin, it is not limited to this, For example, only the surface with which the stopper part of a drive link member contact | abuts a rotation control part is resin. It may be formed from. Also by this, since the contact sound between the stopper portion and the rotation restricting portion can be suppressed, the operation sound of the drive link member can be suppressed.

  In the embodiment, by arranging the coil portion 55A of the torsion spring 55 and the upper connecting wire W1 apart from each other, when the pressure receiving member 40 moves rearward, the upper connecting wire W1 bites into the coil portion 55A. However, as shown in FIGS. 18A and 18B, a cover member 400 may be provided between the coil portion 55A and the upper connecting wire W1.

  The cover member 400 is a member that partially covers the coil portion 55A of the torsion spring 55, and is formed of, for example, resin. The cover member 400 includes a cover portion 410 that covers the outer peripheral surface of the coil portion 55A, an upper engagement portion 420 that extends from the upper end of the cover portion 410 and overlaps the pin 54 above the coil portion 55A, and a lower end of the cover portion 410. The lower engaging portion 430 extends around the lower side of the contact link member 200 and engages with the contact link member 200.

  The cover portion 410 covers a portion of the coil portion 55A closest to the upper connection wire W1 in a state where the contact link member 200 is located at the initial position so as to be disposed between the coil portion 55A and the upper connection wire W1. It extends along the outer peripheral surface of the coil portion 55A from the position to a position covering the rear portion of the coil portion 55A.

  The upper engagement portion 420 has an engagement protrusion 421 protruding from the lower surface, and the engagement protrusion 421 engages with an engagement recess 54A provided on the upper surface of the pin 54, thereby engaging with the pin 54. ing.

  By providing the cover member 400 in this manner, when the pressure receiving member 40 moves rearward, if the upper connecting wire W1 greatly moves rearward, the upper connecting wire W1 hits the cover portion 410 without hitting the coil portion 55A. Thereby, it can suppress that the upper connection wire W1 bites into the coil part 55A. Further, in this modification, the cover member 400 is made of resin, so that it is possible to reduce noise generated when the upper connecting wire W1 hits the cover portion 410.

  In the embodiment, the pressure receiving member 40 does not come into contact with the drive source 52, but the vehicle seat may be configured such that the pressure receiving member 40 comes into contact with the drive source 52. For example, the second bead B2 disposed at the bottom of the second beads B2 provided in the pressure receiving member 40 is disposed at substantially the same height as the upper end portion of the drive source 52, and the second bead B2 May be in contact with the drive source 52 at the initial position.

  In the above-described embodiment, the contact point P between the contact link member 200 and the pressure receiving member 40 is positioned forward of the front end of the side frame 20 in the forward movement position. However, as illustrated in FIG. Also in the position, the contact point P between the contact link member 200 and the pressure receiving member 40 may be configured to be positioned in front of the front end of the side frame 20. That is, the contact point P between the contact link member 200 and the pressure receiving member 40 may always be positioned forward of the front end of the side frame 20.

  In the embodiment, the contact portion 230 of the contact link member 200 is configured to contact the pressure receiving member 40. However, as shown in FIG. 20, the contact link member 200 contacts the pressure receiving member 40. You may provide so that it may not.

  Specifically, the upper connecting wire W1 contacts the first support portion 45 of the pressure receiving member 40 and also continuously contacts the second support portion 46 provided on the outer side in the left-right direction than the first support portion 45. As described above, the first support portion 45 is bent so as to extend further forward from the portion in contact with the first support portion 45, and extends along the second support portion 46. The upper connecting wire W <b> 1 is bent so that the left and right end portions are separated from the second support portion 46, and is connected to the contact link member 200. The contact link member 200 is provided so as not to contact the pressure receiving member 40 while moving from the initial position to the forward movement position.

  It is desirable that the left and right ends of the upper connecting wire W1 extend along the second support portion 46 so that the position closer to the outer side in the left and right direction of the pressure receiving member 40 can be pushed by the upper connecting wire W1. Furthermore, it is desirable that the second support portion 46 extends along the second support portion 46 to the outside of the intermediate portion in the left-right direction. Thereby, the pressure receiving member 40 can be stably supported by the upper connecting wire W1.

  In the above-described embodiment, the coil portion 55A of the torsion spring 55 is provided on the side opposite to the drive source 52 with respect to the contact link member 200, and the coil portion 55A overlaps with the drive source 52 when viewed in the vertical direction. However, the arrangement of the drive source and the torsion spring is not limited to this. For example, as shown in FIG. 21, the coil portion 55A of the torsion spring 55 is provided on the same side as the drive source 52 with respect to the contact link member 200, and the coil portion 55A and the drive source 52 overlap in the horizontal direction. It may be arranged as follows. According to this, the downsizing of the drive mechanism 50 in the vertical direction can be achieved.

  As shown in FIG. 22A, the pressure receiving member 40 may have a notch 47 at the upper part of the left and right ends corresponding to the position of the occupant's shoulder. Specifically, the upper end of the support portion 42 is provided at a position lower than the upper end of the pressure receiving portion 41. When the vehicle is moved backward, the occupant may look back and take a posture with one shoulder facing backward. At this time, if the pressure receiving member 40 does not have the notch 47, when the pressure receiving member 40 moves in a direction opposite to the posture of the occupant by the steering operation, the support portion 42 that has moved forward hits the shoulder. It becomes difficult to face. Since the pressure receiving member 40 in this modification is provided with a notch 47 in a portion corresponding to the position of the shoulder of the occupant, the pressure receiving member 40 does not hit the shoulder of the occupant when the occupant turns around, Easy to turn around.

  Further, as shown in FIGS. 22A and 22B, the pressure receiving member 40 may be easily broken at the center in the left-right direction. Specifically, the pressure receiving member 40 is formed with a fold line extending in the vertical direction, for example, a groove 48 that is recessed when viewed from the front, at the center in the left-right direction. Is also thin. In this pressure receiving member 40, when the support portion 42 of the pressure receiving member 40 is pushed forward by the drive mechanism 50, it is bent at the groove 48, so that the left and right support portions 42 can be moved independently. In addition, the groove | channel 48 may be dented seeing from back, and the front and back both sides may be dented. Further, the folding line may be a perforation that extends in the vertical direction at the center in the left-right direction of the pressure receiving member 40 instead of the groove.

  Moreover, the pressure receiving member 40 may be divided into right and left at the center in the left and right direction. For example, the pressure receiving member 40 may be formed of two plate members 401 arranged side by side as shown in FIG. Note that the lower ends of the two plate members 401 may be connected to each other. In such a pressure receiving member 40, the left and right support portions 42 can be moved more independently.

  In the above embodiment, the bent portion W11 of the upper connecting wire W1 is formed in a U-shape. However, as shown in FIG. 24B, the bent portion W11 is formed in a V-shape and the lower end portion is the third. You may arrange | position in the left-right direction center part of the part 40C. According to this, since it can push to the position of the constriction of the pressure receiving member 40 with the upper connection wire W1, the pressure receiving member 40 becomes easy to twist by the 3rd part 40C. Further, since not only the second portion 40B but also the third portion 40C is supported from the rear by the upper connecting wire W1, the occupant can be stably supported by the pressure receiving member 40.

  In the above-described embodiment, the upper frame 10 is fixed to the side frame main body 21, but the configuration of the seat back frame F2 is not limited to this. For example, as shown in FIG. 24A, the upper frame 10 may be supported so as to be pivotable back and forth with respect to the side frame main body 21.

  Specifically, the upper frame 10 has a pair of left and right upper side frames 13 </ b> A that are rotatably connected to the side frame main body 21. Further, as shown in FIG. 24B, the upper frame 10 has a cross member 14 that connects a pair of upper side frames 13A.

  With respect to the seat back frame F2, the pressure receiving member 40 has both the driving mechanism 50 and the lower connecting wire W2 fixed to the side frame main body portion 21, so that the first portion 40A and the second portion 40B become the side frame main body. Supported by the portion 21. Thereby, since the pressure receiving member 40 does not move when the upper frame 10 is rotated, it is possible to suppress a sense of discomfort experienced by the occupant.

  The entire drive mechanism 50 is disposed below the rotation shaft 20 </ b> A with respect to the side frame main body 21 of the upper frame 10. Thereby, when the upper frame 10 is rotated forward, it is possible to prevent the drive source 52 and the like constituting the drive mechanism 50 from greatly jumping backward from the seat back frame F2.

  Further, the upper end of the pressure receiving member 40 is disposed below the cross member 14, more specifically below the rotation shaft 20 </ b> A with respect to the side frame main body 21 of the upper frame 10. Thereby, when the upper frame 10 rotates forward, it is possible to prevent the upper end portion of the pressure receiving member 40 from greatly jumping backward from the seat back frame F2. Further, since the cross member 14 is disposed above the pressure receiving member 40, the upper body of the occupant is likely to sink into the seat back S2 at the time of a rear collision.

  As shown in FIG. 25, when the seat back frame F2 is configured to rotate around a rotation shaft 25A provided at the lower portion, the pressure receiving member 40 has a first portion 40A below the rotation shaft 25A. The second portion 40B may be provided above the rotation shaft 25A.

  Specifically, the seat back frame F <b> 2 has left and right lower side frames 25 whose upper end portions are rotatably connected to the lower end of the side frame main body portion 21. The drive source 52 is fixed to the side frame main body 21, and the lower connection wire W <b> 2 is fixed to the lower side frame 25. That is, the first portion 40 </ b> A of the pressure receiving member 40 is supported by the lower side frame 25, and the second portion 40 </ b> B of the pressure receiving member 40 is supported by the side frame main body 21.

  The third portion 40C of the pressure receiving member 40 is provided at substantially the same height as the rotation shaft 25A of the seat back frame F2, and the second portion 40B can easily swing back and forth with respect to the first portion 40A. A fold line is provided. The fold line may be a groove, a perforation, or a bellows shape as shown in FIG. As a result, when the side frame main body 21 falls forward about the rotation shaft 25A, the second portion 40B can move forward in accordance with the movement of the side frame main body 21, so that the passenger receives A sense of incongruity can be suppressed.

  In addition, when the third portion 40C is in a position displaced forward and backward with respect to the rotation shaft 25A, the second portion 40B is formed to be extendable in the vertical direction, so that the second portion 40B is formed in the side frame main body portion. It can be easily moved according to the movement of 21. In this case, for example, the third portion 40C can have a shape folded in a bellows shape.

  In the above embodiment, the side frame main body 21 is composed of one component. However, the configuration of the side frame main body 21 is not limited to this, and is composed of two upper and lower plates as shown in FIG. May be.

  Specifically, the side frame main body 21 includes an upper frame 211 and a lower frame 212 disposed below the upper frame 211. The upper frame 211 and the lower frame 212 are fixed to each other by welding, screwing, or the like.

  The second bracket 62 that supports the drive source 52 is provided so as to straddle the boundary between the upper frame 211 and the lower frame 212. The fixing portion 62B of the second bracket 62 includes an upper fixing portion 62D that is fixed to the upper frame 211 with a bolt, and a lower fixing portion 62E that extends downward from the upper fixing portion 62D and is fixed to the lower frame 212 with a bolt. Have. By providing the second bracket 62 in this way, the upper frame 211 and the lower frame 212 can be more firmly fixed.

  In addition, when the side frame main body portion 21 is composed of an upper frame 211 and a lower frame 212 which are vertically divided as shown in FIG. 26, the first bracket 61 and the second bracket 62 are connected to the upper frame 211. You may arrange | position in the position which avoided the boundary which connects the lower frame 212, ie, the upper frame 211, and the lower frame 212. FIG.

  As shown in FIGS. 27 (a) and 27 (b), when the airbag device A is attached to the outside in the left-right direction of the side frame body 21, a webbing A1 that regulates the deployment direction of the bag body of the airbag device A. A mounting hole 21 </ b> B for mounting the frame to the side frame main body 21 can be provided at a position that does not overlap the first bracket 61 (see FIG. 5) and the second bracket 62. More specifically, the mounting hole 21B is provided at a position overlapping the motor 52A, which is thinner than the other part of the drive source 52 such as the gear box 52B, in the left-right direction. The mounting hole 21B is provided at a position that does not overlap the contact link member 200 and the fixed stopper member 70 in the left-right direction (position shifted in the up-down direction).

  Here, the configuration around the airbag device A in the seat back S2 will be briefly described. The airbag device A includes a bag body, an inflator, and the like (not shown), and is fixed to the side frame main body 21 via a support plate A3. The airbag device A is disposed at a position overlapping the drive source 52 in the left-right direction.

  The force cloth A1 is disposed so as to surround the airbag device A, and the front end portion thereof is sewn together with the skin material BP5 at the breaking portion BP51 of the skin material BP5, and the rear end portion is fixed to the side frame main body portion 21. . When the airbag device A is activated, the bag body that is inflated by the gas generated by the inflator expands forward while being guided by the left and right webbings A1, and breaks the breaking portion BP51 to occupy the passenger side. Will be deployed in the direction.

  Each rear end of the force cloth A1 is fixed to a rivet-shaped force cloth attachment member A2. One baffle attachment member A2 is fixed to the side frame main body 21 by engaging with the attachment hole 21B. The other webbing attachment member A <b> 2 is fixed to the side frame main body 21 by engaging with a bent portion 21 </ b> A on the rear side of the side frame main body 21.

  In this modified example, the mounting hole 21B is provided at a position that does not overlap the first bracket 61 and the second bracket 62, so that the forceps mounting member A2 engaged with the mounting hole 21B is connected to each bracket 61, 62. Interference can be suppressed. Further, since the mounting hole 21B is provided at a position that overlaps the motor 52A in the left-right direction, the side frame main body 21 can be downsized as compared with the case where it is provided at a position that does not overlap the motor 52A (drive source 52). . In addition, since the motor 52A is a portion that is thinner than the other part of the drive source 52, it is possible to suppress the webbing attachment member A2 from interfering with the drive source 52. Furthermore, since the baffle attachment member A2 is disposed at a position that does not overlap the drive link member 100, the contact link member 200, and the fixed stopper member 70 in the left-right direction, any of the link members 100, 200 and the fixed stopper member 70 Compared with the case where such a member is provided at the same height position as the baffle attachment member A2, the seat back S2 can be downsized in the left-right direction. Moreover, since the airbag apparatus A is arrange | positioned in the position which overlaps with the drive source 52 in the left-right direction, size reduction of the up-down direction of the side frame main-body part 21 can be achieved.

  In addition, the attachment hole 21B can be further provided at a position above the drive source 52, and the rear end portion of the webbing A1 can be fixed to the side frame main body portion 21 at two upper and lower portions. In this case, since the drive source 52 is disposed between the two mounting holes 21B, the side frame main body 21 can be downsized in the vertical direction and the front-rear direction. Further, the airbag device A may be arranged so as not to overlap the drive source 52 in the left-right direction, that is, shifted in the front-rear direction. In this case, since the driving source 52 and the baffle attachment member A2 do not overlap in the left-right direction, the seat back S2 can be reduced in size in the left-right direction.

  In the above-described embodiment, the torsion spring 55 is exemplified as the biasing member. Moreover, in the said embodiment, although the upper connection wire W1 was illustrated as a 2nd biasing member, it is not limited to this, For example, a coil spring etc. may be sufficient. In the above embodiment, the upper connecting wire W1 and the torsion spring 55 are exemplified as the rotation resistance member, but the present invention is not limited to this. For example, the urging member, the second urging member, and the rotation resistance member are independent of each other. Another member may be used.

  In the embodiment, a part of the extension part 62C of the second bracket 62 fixed to the side frame 20 is disposed on the extension part 22 of the side frame 20. However, the present invention is not limited to this. The entire portion may be disposed on the overhang portion 22.

  The configuration of the bracket 60 shown in the embodiment is an example. For example, in the embodiment, the fixing portion 62B of the second bracket 62 has the extending portion 62C. However, the present invention is not limited to this, and the fixing portion of the first bracket may have the extending portion. . 8A, the engaging portion 62A of the second bracket 62 is engaged with the lower end portion of the drive source 52, and the fixed portion 62B extends below the drive source 52. May be. Moreover, in the said embodiment, although the bracket 60 was comprised from the two 1st bracket 61 and the 2nd bracket 62, it is not limited to this, One bracket may be sufficient.

  In the above-described embodiment, the coupling mechanism 51 is configured to include two links (the drive link member 100 and the abutment link member 200). However, the present invention is not limited to this. For example, the connection mechanism may be configured with one link member, or may be configured with three or more link members.

  In the above-described embodiment, an example in which the present invention is applied to a seat (vehicle seat S) used in an automobile has been described. However, the present invention is not limited thereto, and is used in other vehicles such as a railway vehicle, a ship, and an aircraft It can also be applied to a sheet to be processed.

20 side frame 40 pressure receiving member 50 drive mechanism 51 connection mechanism 52 drive source 52C output shaft 55 torsion spring 100 drive link member 200 abutment link member 210 stopper C1 rotation center C2 rotation center C3 connection part S vehicle seat S1 seat cushion S2 Seat back W1 Upper connecting wire

Claims (12)

A vehicle seat having a seat cushion and a seat back,
Left and right side frames constituting left and right frames of the seat back;
A pressure receiving member disposed between the left and right side frames and receiving a load from an occupant;
A drive mechanism that is disposed on both the left and right sides of the pressure receiving member, and that moves the left end or the right end of the pressure receiving member from the initial position to the forward advance position, or moves from the advance position to the initial position,
The drive mechanism has a connection mechanism connected to the pressure receiving member, and a drive source for operating the connection mechanism,
The connecting mechanism is provided so as to be able to turn back and forth with respect to the left and right side frames, and has a link member connected to the pressure receiving member,
When a load less than a predetermined value is input from the occupant to the pressure receiving member, the rotation of the link member is restricted to the rear, and when a load greater than a predetermined value is input from the occupant to the pressure receiving member, the link member is deformed and deforms. By providing a rotation resistance member that enables a rearward rotation of the vehicle, the connection mechanism is activated when a load of a predetermined level or more is input to the pressure receiving member from an occupant, and the pressure receiving member is moved from the initial position. Also, the vehicle seat is configured to be moved to a backward retracted position. A vehicle seat having a seat cushion and a seat back,
Left and right side frames constituting left and right frames of the seat back;
A pressure receiving member disposed between the left and right side frames and receiving a load from an occupant;
A drive mechanism that is disposed on both the left and right sides of the pressure receiving member, and that moves the left end or the right end of the pressure receiving member from the initial position to the forward advance position, or moves from the advance position to the initial position,
The drive mechanism has a connection mechanism connected to the pressure receiving member, and a drive source for operating the connection mechanism,
The connecting mechanism is provided so as to be able to turn back and forth with respect to the left and right side frames, and has a link member connected to the pressure receiving member,
When a load less than a predetermined value is input from the occupant to the pressure receiving member, the rotation of the link member is restricted to the rear, and when a load greater than a predetermined value is input from the occupant to the pressure receiving member, the link member is deformed and deforms. By providing a rotation resistance member that enables a rearward rotation of the pressure receiving member, the pressure receiving member is operated when a predetermined load or more is input from the occupant to the pressure receiving member, and the pressure receiving member is moved backward from the initial position. A vehicle seat, wherein the vehicle seat is configured to move to a position and to retain the pressure receiving member at the retracted position. A vehicle seat having a seat cushion and a seat back,
Left and right side frames constituting left and right frames of the seat back;
A pressure receiving member disposed between the left and right side frames and receiving a load from an occupant;
A drive mechanism that is disposed on both the left and right sides of the pressure receiving member, and that moves the left end or the right end of the pressure receiving member from the initial position to the forward advance position, or moves from the advance position to the initial position,
The drive mechanism has a connection mechanism connected to the pressure receiving member, and a drive source for operating the connection mechanism,
The connection mechanism is provided so as to be able to rotate back and forth with respect to the left and right side frames, and includes a link member connected to the pressure receiving member and a second link member connected to the output shaft of the drive source. Have
The link member is provided to be rotatable with respect to the second link member,
When a load less than a predetermined value is input from the occupant to the pressure receiving member, the rotation of the link member is restricted to the rear, and when a load greater than a predetermined value is input from the occupant to the pressure receiving member, the link member is deformed and deforms. By providing a rotation resistance member that enables a rearward rotation of the vehicle, the connection mechanism is activated when a load of a predetermined level or more is input to the pressure receiving member from an occupant, and the pressure receiving member is moved from the initial position. Also, the vehicle seat is configured to be moved to a backward retracted position. A vehicle seat having a seat cushion and a seat back,
Left and right side frames constituting left and right frames of the seat back;
A pressure receiving member disposed between the left and right side frames and receiving a load from an occupant;
A drive mechanism that is disposed on both the left and right sides of the pressure receiving member, and that moves the left end or the right end of the pressure receiving member from the initial position to the forward advance position, or moves from the advance position to the initial position,
The drive mechanism has a connection mechanism connected to the pressure receiving member, and a drive source for operating the connection mechanism,
The connection mechanism is provided so as to be able to rotate back and forth with respect to the left and right side frames, and includes a link member connected to the pressure receiving member and a second link member connected to the output shaft of the drive source. Have
The link member is provided to be rotatable with respect to the second link member,
When a load less than a predetermined value is input from the occupant to the pressure receiving member, the rotation of the link member is restricted to the rear, and when a load greater than a predetermined value is input from the occupant to the pressure receiving member, the link member is deformed and deforms. By providing a rotation resistance member that enables a rearward rotation of the pressure receiving member, the pressure receiving member is operated when a predetermined load or more is input from the occupant to the pressure receiving member, and the pressure receiving member is moved backward from the initial position. A vehicle seat, wherein the vehicle seat is configured to move to a position and to retain the pressure receiving member at the retracted position. The connecting portion between the link member and the pressure receiving member is centered on the rotation center of the second link member when viewed from the rotation axis direction of the link member in a state where the pressure receiving member is in the initial position. , according to claim 3 or claim 4, characterized in that the center of rotation of the second link member is disposed inside the circle whose radius is the length of up to the center of rotation of the link member Vehicle seat. The vehicle seat according to any one of claims 1 to 5, wherein the rotation resistance member includes a connection wire that connects the pressure receiving member and the link member. The rotational resistance member, vehicle seat according to any one of claims 1 to 6, characterized in that it comprises a biasing member for biasing the side for rotating the link member before. Any one of claims 1 to 7, characterized in that said pressure receiving member is provided with a second urging member for urging the side to rotate after the link member in a state in said retracted position Vehicle seat described in 1. The link connection portion between member and the pressure receiving member claims 1 to 8, characterized in that said pressure receiving member is disposed in front of the rotation center of the link member in a state in said initial position The vehicle seat according to any one of the above. Connection portion between the pressure receiving member and the link member, of claims 1 to 9, wherein the pressure receiving member is characterized in that it is disposed after the rotational center of the link member in a state in said retracted position The vehicle seat according to any one of claims. Connection portion between the pressure receiving member and the link member from claim 1, characterized in that it is arranged in the left-right direction outer side than the center of rotation of the link member in a state where the pressure receiving member is in the initial position The vehicle seat according to claim 10. For vehicle according to any one of claims 1 to claim 11, wherein the pressure receiving member is provided with a stopper for restricting the rotation amount of contact with the link member when moved to said retracted position Sheet.

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