JP5829121B2 - Vehicle seat - Google Patents

Description

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

  2. Description of the Related Art Conventionally, there has been known an automobile seat in which side support portions are provided on both side portions of a seat body so as to hold a seat occupant from both side portions (see Patent Document 1).

JP 61-109508 A

  By the way, since the conventional side support device supports the occupant's shoulder and upper arm from both sides, the shoulder and upper arm are pressed against one of the left and right support portions during cornering, which may make steering difficult. Also, depending on the occupant's body shape, the shoulder and upper arm may be displaced from the support portion during cornering, and the posture may not be stable.

  The present invention has been made in view of the above background, and an object of the present invention is to provide a vehicle seat that can improve steering performance and cornering stability during cornering.

  In order to achieve the above object, a vehicle seat of the present invention includes a seat cushion and a seat back, and the seat back forms a seat back frame that constitutes a frame of the seat back, and a seat back that covers the seat back frame. A vehicle seat having a pad, wherein the seat back pad includes a central portion facing the upper back of the occupant, and left and right sides of the central portion that are provided on the left and right sides of the central portion and project before the central portion. The seat back has a portion facing the portion below the base of the occupant's arm of the left and right side portions more toward the occupant than a portion facing the other portion of the occupant. It is characterized by swelling.

  According to such a configuration, the occupant's shoulder and upper arm can be freed by supporting the part below the base of the occupant's arm from the left and right by the bulging portions of the left and right sides of the seat back. Therefore, the steering performance during cornering can be improved. In addition, unlike the shoulder and upper arm, the part under the occupant's arm base is a part that does not move during steering, so supporting this part from the left and right improves the occupant's posture stability. Can do.

  The vehicle seat described above includes an occupant support member that is provided in the seat back and bulges a portion of the side that faces a portion of the occupant's arm at the base of the occupant's arm, By deforming or moving, the bulge amount of the side portion can be changed.

  According to such a configuration, the bulging amount of the left and right side portions of the seat back can be adjusted according to the occupant's body shape. Can be improved.

  In the vehicle seat described above, the top of the occupant support member that bulges toward the occupant can be configured to be disposed inside the left and right side frames of the left and right side frames of the seat back frame.

  According to such a configuration, the top portion is located on the inner side in the left-right direction of the side frame even before and after the deformation and movement of the occupant support member, so the left and right sides of the seat back (near the occupant support member are disposed) An increase in direction can be suppressed.

  In the vehicle seat including the above-described occupant support member, the occupant support member has a plate shape, and is configured to be able to change the bulge amount by changing the amount of bending, and is bulged toward the occupant when bent. It can be set as the structure which the top part to protrude extends along an up-down direction.

  According to such a configuration, since the tops of the bulging portions on the left and right side portions are along the upper body of the occupant extending in the vertical direction, the occupant holdability by the bulging portions can be improved. Thereby, stability of a passenger | crew's attitude | position can be improved more.

  In the vehicle seat described above, the occupant support member is configured such that an outer end portion in the left-right direction is fixed and an inner end portion in the left-right direction is supported so as to move in a direction approaching or separating from the outer end portion. It can be.

  According to such a configuration, the bulging amount of the left and right side portions can be relatively increased compared to the configuration in which the inner end portion is fixed and the outer end portion is movably supported. It is possible to increase the adjustable range of the bulging portion of the side portion.

  Further, in the vehicle seat including the occupant support member in which the top portion extends along the vertical direction, the occupant support member includes a plate-like support portion extending in the left-right direction and a surface facing the occupant of the support portion. An extension portion extending from a middle portion in the left-right direction of the opposite surface, and an outer end portion in the left-right direction of the support portion is fixed, and an end portion of the extension portion is It can also be set as the structure which is supported so that it can move to the direction which adjoins or separates with respect to an outer side edge part, and the inner side edge part in the left-right direction of the said support part is a free end.

  According to such a structure, compared with the structure supported so that the inner side edge part of a support part can adjoin to or move away from an outer side edge part, the curve of a support part is made comparatively gentle. be able to. Thereby, since the feeling of contact of the occupant support member (the bulging portions of the left and right side portions) with respect to the occupant can be eased, the sitting comfort of the vehicle seat can be improved.

  In the vehicle seat in which the outer end portion of the occupant support member is fixed, the seat back frame is opposed to each other in the left-right direction, and the left and right side frames each have a protruding portion that protrudes forward from the upper portion than the upper portion. And a connecting wire attached so as to connect the upper portion of the side frame and the overhang portion, and the occupant support member has a configuration in which the outer end portion is fixed to the connecting wire. it can.

  According to such a configuration, since at least the outer end portion of the occupant support member is directly fixed to the seat back frame, a part for fixing the outer end portion becomes unnecessary. As a result, it is possible to reduce the number of parts and to prevent the occupant support member mounting structure from becoming complicated.

  A vehicle seat including the above-described occupant support member includes an airbag device that protects the occupant from the side, and a drive device that deforms or moves the occupant support member in order to change the bulge amount of the side portion. The airbag device may be attached to one of the left and right side frames of the seat back frame, and the drive device may be attached to the other of the left and right side frames.

  According to such a configuration, interference between the airbag device and the drive device can be avoided. Moreover, the freedom degree of arrangement | positioning of an airbag apparatus and a drive device can be improved compared with the case where an airbag apparatus and a drive device are attached to the same side frame.

  In the vehicle seat including the above-described occupant support member, the seat back pad is provided with a slot hole penetrating at a position corresponding to the occupant support member in the vertical direction between the center portion and the left and right side portions. It can be set as the structure currently provided.

  According to such a configuration, the left and right side portions are easily deformed in accordance with the deformation or movement of the occupant support member, so that the operation of the vehicle seat at the time of adjusting the bulge amount can be improved. In addition, since the force for deforming or moving the occupant support member can be made relatively small, the operability at the time of adjusting the bulge amount can be improved, and the apparatus for deforming or moving the occupant support member can be reduced in size and cost. It is possible to make it easier.

  In the vehicle seat including the above-described occupant support member, the seat back frame includes a support wire that is provided between the left and right side frames and supports the upper body of the occupant, and the support wire is directed upward or downward. The occupant support member can be configured to be opposed to the concave portion of the bent portion.

  According to such a structure, even if a support wire moves with the load from a passenger | crew, interference with a support wire and a passenger | crew support member can be suppressed.

  According to the present invention, of the left and right side portions of the seat back, the portion facing the portion below the base of the occupant's arm bulges toward the occupant rather than the portion facing the other portion of the occupant. Therefore, it is possible to improve the steering performance and the posture stability during cornering.

  In addition, according to the present invention, by providing an occupant support member that can change the bulge amount of the side part by being deformed or moved, it is possible to stabilize the steering performance and the posture during cornering regardless of the occupant's body shape. Can be improved.

  Further, according to the present invention, it is possible to suppress an increase in the size of the seat back in the left-right direction by disposing the top of the occupant support member on the inner side in the left-right direction of the left and right side frames of the seat back frame.

  In addition, according to the present invention, the top of the occupant support member (the bulging portion) is configured to extend along the vertical direction, whereby the occupant's holdability can be improved and the occupant's posture stability is further improved. Can be improved.

  Moreover, according to this invention, the adjustable range of the bulging part of a right-and-left side part can be enlarged by fixing the outer side edge part of a passenger | crew support member and making an inner side edge part movable.

  Further, according to the present invention, the occupant support member is formed in a forked shape having a support portion and an extension portion, the outer end portion of the support portion is fixed, and the end portion of the extension portion is movably supported. By making the inner end portion of the support portion a free end, it is possible to relieve the feeling of contact of the occupant support member with respect to the occupant and improve the sitting comfort of the vehicle seat.

  In addition, according to the present invention, by fixing the outer end of the occupant support member to the connecting wire of the seat back frame, parts for fixing the outer end are not necessary, so the number of parts can be reduced, Complicating the mounting structure of the occupant support member can be suppressed.

  Further, according to the present invention, the airbag device is attached to one of the left and right side frames, and the driving device that deforms or moves the occupant support member is attached to the other of the left and right side frames. Interference can be avoided and the degree of freedom in the arrangement of the airbag device and the driving device can be improved.

  Further, according to the present invention, by providing a slot hole penetrating at a position corresponding to the occupant support member between the central portion and the left and right side portions of the seat back pad, the vehicle seat at the time of adjusting the bulge amount The operation can be improved. In addition, it is possible to improve the operability when adjusting the bulge amount, and to reduce the size and cost of the device for deforming or moving the occupant support member.

  Further, according to the present invention, the occupant support member is disposed so as to be opposed to the concave portion of the bent portion of the support wire, so that the support wire and the occupant support member are not interfered when the support wire moves. Can be suppressed.

It is a perspective view of a vehicle seat as a vehicle seat according to the first embodiment. It is a perspective view of a seat frame built in a vehicle seat. It is a front view of the seat back frame which comprises a seat frame. It is a perspective view of a fixed plate, its periphery, and a movable plate. It is XX sectional drawing of FIG. 4, and is the figure (a) before a bulging part is formed, and the figure (b) after a bulging part is formed. It is a front view of the seat back pad which covers a seat back frame. FIG. 2 is a side view of a vehicle seat on which an occupant is seated. It is a perspective view of the movable plate of the vehicle seat which concerns on 2nd Embodiment, and its periphery. FIG. 9 is a cross-sectional view taken along the line Y-Y in FIG. 8, (a) before the bulging portion is formed and (b) after the bulging portion is formed. It is a figure which shows the structure of the movable plate of the vehicle seat which concerns on 3rd Embodiment, and its periphery, The figure (a) before a bulging part is formed, and the figure (b) after a bulging part is formed ). It is a figure which shows the structure of the movable plate of the vehicle seat which concerns on the modification of 3rd Embodiment, and its periphery, The figure (a) before a bulging part is formed, and after a bulging part is formed FIG.

[First Embodiment]
Next, a first 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. ing. As will be described in detail later, the seat back S2 of the vehicle seat S has other parts of the occupant (for example, the part of the left and right side parts 72 facing the part below the base of the occupant's arm (for example, A bulging portion 73 that bulges toward the occupant rather than a portion facing the waist. Thus, the occupant seated on the vehicle seat S is supported in a state where the portion under the arm base is sandwiched from the left and right by the left and right bulging portions 73.

  A seat frame F as shown in FIG. 2 is built in the seat cushion S1 and the seat back S2. The seat frame F is mainly composed of a seat cushion frame F1 constituting a frame of the seat cushion S1 and a seat back frame F2 constituting a frame of the seat back S2. The seat cushion S1 is configured by covering a seat cushion frame F1 with a seat cushion pad made of a cushion material such as urethane foam and a skin material made of synthetic leather or fabric, and the seat back S2 is placed on the seat back frame F2. The seat back pad 70 (refer to FIG. 6) made of a cushion material and a skin material are covered.

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

  The seat back frame F2 mainly includes an upper frame 10, left and right side frames 20, and a lower frame 30, and the upper frame 10, the left and right side frames 20, and the lower frame 30 are integrally formed by welding or the like. It is formed in a combined frame shape. A pressure receiving member 40 that supports the upper body of the occupant so as to be able to move backward is disposed inside the frame-shaped seat back frame F2, and the left and right side frames 20 each have a movable plate as an occupant support member. 50 is arranged.

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

The left and right side frame main body portions 21 are formed in a substantially U shape in sectional view by pressing a metal plate or the like, and are arranged to face in the left-right direction. The side frame main body portion 21 is coupled to the vertical pipe portion 13 while holding the vertical pipe portion 13 at the upper portion thereof, and has a protruding portion 22 whose lower portion projects forward from the upper portion. Is formed.
In the present embodiment, the right side frame 20 is provided with an airbag device AB that supports the occupant from the side, and the left side frame 20 is provided with an actuator AC as a drive device described later. Yes.

  The pressure receiving member 40 is a plate-like member made of resin or the like, and, as shown in FIG. 3, via an upper support wire W1 and a lower support wire W2 as support wires provided between the left and right side frames 20. The left and right side frames 20 are connected so as to be movable backward. In more detail, the upper support wire W1 is locked to a locking portion (not shown) formed on the back side upper portion of the pressure receiving member 40, and after bending so that the left and right ends are convex upward, The upper end of the pressure receiving member 40 is connected to the left and right side frames 20 by engaging the end portion of the pressure receiving member 40 with the supporting tongue piece 14 fixed to the vertical pipe portion 13. Further, the lower support wire W2 is locked to a locking portion (not shown) formed in the lower portion on the back side of the pressure receiving member 40, and the left and right end portions are fixed to the rear side fixed to the inner side surface of the side frame main body portion 21. The pressure receiving member 40 is connected to the left and right side frames 20 by being locked to the swingable link member 23.

  Such a pressure receiving member 40 normally supports the upper body of the occupant leaning against the seat back S2 by being supported later by the upper support wire W1 and the lower support wire W2. And when the other vehicle collides with the rear part of the host vehicle, or when the rear part of the host vehicle that moves backward collides with the other vehicle or the structure and the backward movement load acts on the seat back S2 from the upper body of the occupant, The bent portions at the left and right ends of the upper support wire W1 are bent, and the left and right ends of the lower support wire W2 are moved backward by the swinging of the link member 23, thereby moving backward with respect to the left and right side frames 20. Moving. As a result, the upper body of the occupant sinks into the seat back, so that it is possible to alleviate the influence of the load during the rear-end collision on the occupant. The link member 23 is configured to swing backward by a known mechanism using a tension coil spring (reference numeral omitted) when a backward movement load of a predetermined value or more is applied.

  The movable plate 50 is a member for maintaining the shape of the bulging portion 73 (see FIG. 1) that bulges toward the occupant. As shown in FIG. 4, the movable plate 50 includes a flat plate-like main body portion 51 and a two-dot chain line. In the assembling state shown, it has mainly a hook portion 52, a ridge portion 53, and a pressing portion 54 formed on the surface facing the side frame 20. The movable plate 50 is made of resin or the like, and the flat plate-like main body 51 can be elastically bent and deformed. Moreover, in this embodiment, the movable plate 50 is assembled | attached to the side frame 20 via the fixed plate 60, as shown with the dashed-two dotted line.

  The fixing plate 60 is formed of resin or the like, and is fixed to the side frame 20 so as to hold the side frame 20. More specifically, as shown in FIG. 5A, the fixing plate 60 includes a curved portion 61 that curves and extends along the peripheral surface of the vertical pipe portion 13 in a cross-sectional view, and a side from the front end of the curved portion 61. An extension part 62 extending forward and backward toward the frame 20, a front fixing part 63 extending from the rear end of the extension part 62 in the left-right direction, and a rear part extending from the rear end of the bending part 61 in the left-right direction. The front fixing part 63 is fixed to the front surface of the side frame 20 with screws (not shown), and the rear fixing part 64 is fixed to the rear surface of the side frame 20 with screws. Thus, it is fixed to the side frame 20. More specifically, the fixing plate 60 is arranged and fixed at a height position corresponding to a portion below the base of the occupant's arm in the vertical direction. The curved portion 61 is formed with a concave portion 61 </ b> A that is recessed toward the side frame 20. A hook engaging portion 62A that protrudes outward in the left-right direction is formed in the vicinity of the center of the extending portion 62 in the vertical direction, and the tip of the hook portion 52 is fitted into the hook engaging portion 62A. A mating groove (reference numeral omitted) is formed.

  The hook portion 52 of the movable plate 50 extends from the end portion (outer end portion 51A) located on the outer side in the left-right direction of the main body portion 51 toward the side frame 20, and is formed in a bowl shape with its tip bent and facing forward. ing. The tip of the hook portion 52 is widened to have a substantially cylindrical shape, and the movable plate 50 is assembled to the fixed plate 60 (side frame 20) by fitting into the fitting groove of the hook engaging portion 62A. Yes. Thereby, the movable plate 50 will be arrange | positioned in the height position corresponding to the site | part under the base of a passenger | crew's arm. Further, as shown in FIG. 4, the movable plate 50 (main body 51) has a bent portion W11 that is bent so as to protrude toward the upper support wire W1 in the assembled state indicated by a two-dot chain line. It is disposed below the bent portion W11 so as to face the concave portion.

  The protrusions 53 are rib-like portions protruding from the end (inner end 51B) side located on the inner side in the left-right direction of the main body 51, and two are provided at predetermined intervals in the vertical direction. . In the assembled state (see FIG. 5), the pair of protrusions 53 enter the recess 61A of the bending portion 61, and the end portions abut against the bottom surface of the recess 61A, so that the movable plate 50 and the fixed plate 60 are in contact with each other. Keep an interval. Further, as will be described later, when the inner end portion 51B moves in a direction approaching or separating from the outer end portion 51A (when the main body portion 51 is deformed), the protruding portion 53 has an end portion thereof. The bottom end of the recess 61A is slidably contacted, and the side surface is slidably contacted to the upper or lower wall of the recess 61A, thereby guiding the movement of the inner end 51B together with the recess 61A.

The pressing portion 54 is a plate-like portion protruding from between the pair of ridge portions 53, and a through hole 54 </ b> A for passing the inner cable 55 </ b> A of the cable 55 is formed.
The cable 55 includes an inner cable 55A and a tubular outer cable 55B through which the inner cable 55A is slidably inserted. The inner cable 55A is inserted into the through hole 54A, and one end thereof is formed. It is attached to the movable plate 50 by being fixed to a through hole 52 </ b> A formed in the hook portion 52. The outer cable 55B is formed to have a larger diameter than the through hole 54A, and one end portion 55C is in contact with the rear surface of the pressing portion 54 in the assembled state shown in FIG.

  As shown in FIG. 2, the cable 55 extending from the movable plate 50 passes through the rear of the seat frame F and is drawn to the outside in the left-right direction of the left side frame 20, and the other end deforms the movable plate 50. It is connected to the actuator AC. More specifically, the other end of the inner cable 55A is wound around a reel (not shown) provided in the actuator AC, and is wound or sent out according to the rotation of the reel. The cable 55 is configured such that one end of the inner cable 55A shown in FIG. 5 is drawn into the outer cable 55B when the actuator AC is actuated and the other end of the inner cable 55A is wound up.

As shown in FIGS. 5A and 5B, the movable plate 50 (main body portion 51) has a top portion 51 </ b> C that bulges toward the occupant and is disposed inside the left and right side frames 20. Further, the movable plate 50 is installed with a flat plate-like main body portion 51 bent in a bow shape in a natural state, and the top portion 51C extends in the vertical direction.
In the above, the configuration of the left movable plate 50 and the fixed plate 60 has been mainly described. However, the right movable plate 50 is formed and disposed symmetrically with the left movable plate 50, and the right fixed plate 60. Is formed and disposed symmetrically with the left fixed plate 60.

  The left and right movable plates 50 and the seat back frame F2 in which these are assembled are covered with the seat back pad 70 and the skin material. As a result, the inner end 51B of the movable plate 50 is pressed by the seat back pad 70 and the skin material, so that it does not rattle.

  As shown in FIG. 6, the seat back pad 70 that covers the seat back frame F <b> 2 and the like is provided at the center portion 71 facing the occupant's upper back and on the left and right sides of the center portion 71 and in front of the center portion 71. And left and right side portions 72 projecting. The seat back pad 70 is provided with a plurality of suspending grooves 76A for suspending the skin material at the central portion 71 or a boundary portion 75 between the central portion 71 and the left and right side portions 72 as viewed from the front. It has been. Further, the seat back pad 70 is provided with a slot hole 77 that is elongated in the vertical direction at a height position corresponding to the movable plate 50 in the vertical direction of the boundary portion 75.

  It should be noted that, as shown in FIGS. 1 and 2, the vehicle seat S of the present embodiment has a member for supporting the shoulders and arms of a seated occupant (for example, conventional technology). There is no side support part. As a result, the occupant can move his shoulders and arms freely.

Next, the effect of the vehicle seat S configured as described above will be described.
When the movable plate 50 is in the state shown in FIG. 5A, the actuator AC is activated by the occupant operating the controller (not shown), and the other end of the inner cable 55A is wound up. One end portion of 55A is pulled into the outer cable 55B, so that one end portion 55C of the outer cable 55B presses the pressing portion 54. Then, as shown in FIG. 5B, the pressing portion 54 (inner end portion 51B) moves toward the front diagonally left so as to be close to the outer end portion 51A, so that the bending amount of the main body portion 51 is large. Thus, the portion of the left and right side portions 72 of the seat back pad 70 facing the portion below the base of the occupant's arm is bulged toward the occupant. As a result, a bulging portion 73 is formed in the seat back pad 70, and as shown in FIG. 7, the portion under the base of the arm of the occupant P is sandwiched and supported from the left and right.

  In the vehicle seat S, the occupant P is supported in a state in which the portion under the base of the arm is sandwiched from the left and right by the bulging portion 73, so that the upper body is prevented from shifting to the left and right, and the shoulder and Arms are free. Therefore, during cornering, the portion under the base of the arm is pressed against the left and right bulged portions 73 due to inertia, but the shoulders and arms are free, and the steering can be operated satisfactorily. In addition, unlike the shoulders and arms, the part under the base of the arm of the occupant P is a non-moving part, and by supporting the part sandwiched from the left and right, the stability of the posture of the occupant P is improved. be able to.

  In the present embodiment, since the top portion 51C that bulges toward the passenger P when the main body portion 51 is curved extends along the vertical direction, the top portion of the bulging portion 73 also extends in the vertical direction. Thereby, since the top part of the bulging part 73 follows the upper body extended up and down of the passenger | crew P, the holdability of the passenger | crew P by the bulging part 73 can be improved. As a result, the stability of the posture of the occupant P can be further improved.

  When the movable plate 50 is in the state shown in FIG. 5B, the actuator AC is operated by the occupant operating the controller, and the other end of the inner cable 55A is sent out, as shown in FIG. Thus, the rear end of the inner cable 55A is pulled diagonally rightward so that the inner end 51B is separated from the outer end 51A while the one end of the inner cable 55A is pulled out from the outer cable 55B by the force of the main body 51 returning to the original shape. Move towards As a result, the bending amount of the main body 51 is reduced, and the bulging amount of the portion of the left and right side portions 72 that faces the portion under the base of the occupant's arm is reduced. In the present embodiment, the bulging portion 73 is not formed when the main body 51 shown in FIG. 5A is completely returned to its original shape.

  In the vehicle seat S, the amount of bending of the movable plate 50 (main body portion 51) is adjusted to the state shown in FIG. 5A and FIG. Since it can change between the states shown in (b), it is possible to switch the presence / absence of the bulging portion 73 and to change the bulging amount of the bulging portion 73. As a result, the bulging amount of the left and right side portions 72 can be adjusted in accordance with the occupant's body shape, so that the steering performance and the stability of the posture during cornering can be improved regardless of the occupant's body shape. Moreover, since the bulging part 73 is not formed by making the shape of the main body part 51 into the state shown in FIG. 5A, it is possible to meet the needs of passengers who do not want to be supported by the bulging part 73.

  In the present embodiment, the movable plate 50 (main body 51) is supported so that the inner end 51B can move in the direction approaching or separating from the outer end 51A. The amount can be made relatively large. Supplementally, contrary to the present embodiment, in the configuration in which the outer end portion 51A is movable in the direction approaching or separating from the inner end portion 51B, the curvature of the main body portion 51 is increased, so that the top portion 51C is The bulge 73 cannot be formed because it approaches the central portion 71 and in some cases moves behind the front surface of the central portion 71. That is, in the configuration in which the outer end 51 </ b> A moves, the entire deformable range of the main body 51 cannot be used to bulge the side 72. Get smaller. On the other hand, in the present embodiment, the entire deformable range of the main body 51 from the state shown in FIG. 5A to the state shown in FIG. Since it can do, the adjustable range of the bulging part 73 can be enlarged.

  As shown in FIG. 6, the seat back pad 70 is provided with slot holes 77 at positions corresponding to the movable plate 50 of the boundary portion 75, so that the left and right side portions 72 are changed according to the deformation of the movable plate 50. It is easy to deform. Thereby, the operation | movement of the vehicle seat S at the time of bulging amount adjustment can be made favorable. Further, since the force for deforming the movable plate 50 can be made relatively small, the actuator AC can be reduced in size and cost.

  Further, as shown in FIG. 5, the movable plate 50 (main body portion 51) has a top portion 51C that bulges toward the occupant and is disposed inside the left and right side frames 20 before and after deformation. 51C does not jump out of the left and right side frames 20. Thereby, the enlargement of the left-right direction of seat back S2 can be suppressed.

  Further, as shown in FIG. 2, since the airbag apparatus AB is attached to the right side frame 20 and the actuator AC is attached to the left side frame 20, interference between the airbag apparatus AB and the actuator AC is avoided. be able to. Moreover, compared with the case where the airbag apparatus AB and actuator AC are attached to the same side frame 20, the freedom degree of these arrangement | positioning can be improved. In the present embodiment, since the airbag device AB and the actuator AC are attached to the outside of the side frame 20 and the movable plate 50 is disposed from the front side to the inside of the side frame 20, the movable plate 50, the airbag, Interference with the device AB and the actuator AC can be avoided.

  Furthermore, as shown in FIG. 4, the movable plate 50 is disposed so as to oppose the concave portion of the bent portion W11 of the upper support wire W1 (here, a space formed by bending upwardly convexly). Therefore, even if the backward movement load acts and the upper support wire W1 moves, the interference with the upper support wire W1 can be suppressed. In addition, as shown in FIG. 3, the movable plate 50 is arrange | positioned at the right-and-left both sides of the pressure receiving member 40, and it is under the rod-shaped cross member 15 (skin attachment member) on which the rear skin material is hooked. Since they are arranged, interference with the pressure receiving member 40 and the cross member 15 can also be suppressed.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the following description, the same components as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 8, in this embodiment, the left and right side frames 20 (only one is shown) are welded so as to connect the vertical pipe portion 13 that is the upper portion thereof and the overhang portion 22 of the side frame main body portion 21. It has a rod-shaped connecting wire 25 attached by, for example. In the present embodiment, the left and right side portions of the seat bag pad (not shown) mainly have a shape that projects forward by the projecting portion 22 and the connecting wire 25. Each side frame 20 is provided with a movable plate 150 and a pair of guide wires 160 at height positions corresponding to portions under the base of the occupant's arms.

  The pair of guide wires 160 are rod-shaped members made of metal or the like, and are fixed to the side frame 20 with a predetermined interval in the vertical direction. In more detail, as shown in FIG. 9A, the guide wire 160 is bent from the guide wire 161 extending obliquely rearward in the left-right direction from the connecting wire 25, and bent from the rear end of the guide portion 161 in the left-right direction. A rear fixing portion 162 extending outward, the rear fixing portion 162 is fixed to the rear surface of the side frame main body portion 21 by welding or the like, and the front end of the guide portion 161 is wound around the connecting wire 25. It is fixed to the side frame 20.

  The movable plate 150 is a plate-like member formed of resin or the like, and can be elastically bent and deformed. As shown in FIG. 8, the movable plate 150 has an outer end 51 </ b> A fixed to the connecting wire 25 by a binding band 152 between a pair of guide wires 160. The movable plate 150 has a pair of through holes 153 formed in the inner end portion 51 </ b> B inserted through the guide portion 161. With such a configuration, the movable plate 150 is supported so as to be movable in a direction approaching or separating from the fixed outer end 51 </ b> A as the inner end 51 </ b> B moves along the guide 161. . As shown in FIG. 9A, a through hole (not shown) through which the inner cable 55A of the cable 55 is inserted is provided near the center in the vertical direction of the outer end 51A and the inner end 51B. One end of the cable 55A is fixed to the outer end 51A. Further, one end portion 55C of the outer cable 55B is in contact with the inner surface of the inner end portion 51B in the left-right direction.

Next, the operation of the movable plate 150 will be described.
When the movable plate 150 is in the state shown in FIG. 9A, when one of the inner cables 55A is pulled into the outer cable 55B by operating the controller, one end 55C of the outer cable 55B is moved to the inner end. By pushing the portion 51B toward the outer end portion 51A, the inner end portion 51B moves along the guide portion 161 in the direction approaching the outer end portion 51A, as shown in FIG. 9B. As a result, the amount of bending of the movable plate 150 is increased, so that the portion of the left and right side portions 72 that faces the portion below the base of the occupant's arm bulges toward the occupant, thereby forming the bulging portion 73. Is done.

  On the other hand, when the movable cable 150 is in the state shown in FIG. 9B, when the occupant operates the controller and the inner cable 55A is loosened, the movable plate 50 is returned to the original position as shown in FIG. Due to the force of returning to the shape, the inner end portion 51B moves along the guide portion 161 in a direction away from the outer end portion 51A. As a result, the amount of bending of the movable plate 150 is reduced, and the bulging amount of the portion of the left and right side portions 72 that faces the portion under the base of the occupant's arm is reduced.

Also in the present embodiment described above, substantially the same effect as that of the first embodiment described above can be obtained.
In the present embodiment, since the outer end 51A of the movable plate 150 is directly fixed to the connecting wire 25, that is, the side frame 20 (seat back frame F2), a bracket for fixing the outer end 51A or the like. This part is unnecessary. As a result, the number of parts can be reduced and the mounting structure of the movable plate 150 can be prevented from becoming complicated.

[Third Embodiment]
Next, a third embodiment of the present invention will be described.
As shown in FIGS. 10A and 10B, the movable plate 250 of this embodiment is formed to have a bifurcated shape in plan view. More specifically, the movable plate 250 includes a plate-like support portion 251 extending in the left-right direction (front oblique left to rear oblique right), and a surface on the outer side in the left-right direction of the support portion 251 (opposite to the surface facing the occupant). Side surface) is formed in a bifurcated shape having an extending portion 252 extending rearward from a middle portion in the left-right direction.

  The outer end 51 </ b> A in the left-right direction of the support portion 251 is fixed to the connecting wire 25. In addition, a pair of through holes (not shown) are formed in the end 253 of the extending part 252, and the through holes are inserted into the pair of guide parts 161 (only one is shown). As a result, the end 253 is supported so as to be movable in the direction approaching or separating from the outer end 51 </ b> A by moving along the guide 161. And in this embodiment, the inner side edge part 51B in the left-right direction of the support part 251 is a free end which is not fixed.

  An inner cable (not shown) is stretched between the outer end 51A and the end 253 in the same manner as in the second embodiment, and the inner cable is attached to the inner surface of the end 253 in the left-right direction. One end of the tubular outer cable to be inserted is in contact.

  When the movable plate 250 is in the state shown in FIG. 10A, when the occupant operates the controller and one end of the inner cable is drawn into the outer cable, the one end of the outer cable connects the end 253 to the outer end. By pushing toward the portion 51A, the end portion 253 moves along the guide portion 161 in the direction approaching the outer end portion 51A, as shown in FIG. 10B. As a result, the vicinity of the center portion of the support portion 251 is pushed out to the occupant side, and the bending amount of the support portion 251 increases, so that the portion of the left and right side portions 72 that faces the portion under the occupant's arm base A bulging portion 73 is formed.

  On the other hand, when the movable cable 250 is in the state shown in FIG. 10B, if the inner cable is loosened by the occupant operating the controller, as shown in FIG. The end portion 253 moves along the guide portion 161 in a direction away from the outer end portion 51A due to the force of returning to the position. Thereby, the bending amount of the support part 251 becomes small, and the bulging amount of the bulging part 73 becomes small.

Also in the present embodiment described above, substantially the same effect as that of the first embodiment described above can be obtained.
In the present embodiment, the inner end 51B is a free end, so that the inner end 51B can move in the direction of approaching or separating from the outer end 51A as in the second embodiment. Compared to the configuration supported by the support portion 251, the bending state of the support portion 251 can be made relatively gentle. Thereby, since the feeling of contact of the movable plate 250 with respect to the occupant can be reduced, the seating comfort of the seat can be improved.

  In the above-described embodiment, the movable plate 250 is formed in a bifurcated shape as one part. However, the movable plate 250 is not limited to this. For example, the movable plate 250 is composed of two parts and is assembled into the side frame 20 in a state of being two. Moreover, you may form so that a shape may be made. Specifically, as shown in FIG. 11A, the movable plate 250 ′ is composed of two plate-shaped members, that is, a support member 251 ′ and a movable member 252 ′. 51 and the outer end 51A of the movable member 252 are fixed to the connecting wire 25, respectively.

The end 253 (inner end) of the movable member 252 ′ extending so as to branch backward from the middle portion of the outer surface of the support member 251 ′ is the movable plate 150 of the second embodiment. The inner end portion 51B is supported in the same manner as the inner end portion 51B. By moving along the guide portion 161, the inner end portion 51B can move in a direction approaching or separating from the outer end portion 51A. Further, a cable (not shown) is attached to the movable member 252 ′ in the same manner as the movable plate 150 of the second embodiment described above.
The inner end 51B of the support member 251 ′ is a free end.

  As shown in FIG. 11 (b), when the occupant operates the controller and the amount of bending of the movable member 252 ′ increases, the amount of bending of the support member 251 ′ increases by being pushed by the top of the movable member 252 ′. Become. Thereby, the bulging part 73 is formed in the part which faces the site | part under the base of the passenger | crew's arm among the right and left side parts 72. FIG.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. About a concrete structure, it can change suitably in the range which does not deviate from the meaning of this invention.

  In the embodiment, the movable plate 50 or the like as the occupant support member is supported so as to be movable in the direction in which the inner end portion 51B approaches or moves away from the outer end portion 51A. However, the present invention is limited to this. It is not something. For example, the plate-like occupant support member may be supported so as to be movable in a direction in which the outer end portion approaches or separates from the inner end portion. Moreover, in the said embodiment, although plate-shaped members, such as movable plates 50 and 150, were illustrated as a passenger | crew support member, this invention is not limited to this, For example, a passenger | crew support member is a substantially semi-columnar member. It may be.

  In the above-described embodiment, the vehicle seat S is configured such that the bulging amount of the side portion 72 can be changed by deforming the movable plate 50 as an occupant support member, but the present invention is limited to this. It is not a thing. For example, referring to FIG. 5B, the vehicle seat S is supported so that the flat movable plate 50 can move (moves forward and backward) in a direction in which the flat movable plate 50 approaches or separates from the occupant. 50 may be configured to be moved by a driving device such as a motor. Moreover, in the said embodiment, although the vehicle seat S was comprised so that change of the bulging amount of the side part 72 was possible, this invention is not limited to this, The bulging part of the side part is the amount of bulging. The configuration may not be changed. Specifically, for example, a flat plate-like occupant support member that forms a bulging portion on the side is bent in a bow shape, and both the outer end and the inner end are fixed to a side frame, etc., thereby supporting the occupant. It is good also as a structure which can fix the shape of a member and cannot change the bulging part of a side part by this. Further, in a configuration that does not include an occupant support member, the side portion (seat back pad) itself may have a bulging portion at a portion facing a portion under the base of the occupant's arm.

  In the embodiment, the airbag device AB is attached to the right side frame 20 and the actuator AC (driving device) is attached to the left side frame 20, but the present invention is not limited to this. The arrangement opposite to that of the embodiment may be used. Further, the airbag device and the drive device may be attached to the same side frame. The drive device may be provided in the seat cushion.

  The shape of the slot hole 77 shown in the embodiment is an example, and the present invention is not limited to the configuration of the embodiment. For example, referring to FIG. 6, the slot hole may be formed in a substantially U shape having portions extending left and right above and below the movable plate 50. The slot hole may also serve as a hole for suspending the skin material. In the present invention, as long as the side portion can be satisfactorily deformed in accordance with deformation or movement of the occupant support member, the seat back pad may not be provided with a slot hole.

  In the above-described embodiment, the movable plate 50 (occupant support member) faces the recessed portion of the bent portion W11 that is bent so as to protrude toward the upper support wire W1 (support wire). Although arranged below the bent portion W11, the present invention is not limited to this. For example, the occupant support member may be disposed on the bent portion so as to face the recessed portion of the bent portion that is bent so as to be convex toward the bottom of the support wire. Moreover, in the said embodiment, although the upper support wire W1 and the lower support wire W2 which connect the pressure receiving member 40 to the right and left side frames 20 were illustrated as a support wire, this invention is not limited to this. For example, the support wire may be a seat spring that is stretched between the left and right side frames in a configuration that does not include a pressure receiving member.

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

DESCRIPTION OF SYMBOLS 13 Vertical pipe part 20 Side frame 22 Overhang | projection part 25 Connection wire 50 Movable plate 51A Outer edge part 51B Inner edge part 51C Top part 70 Seat back pad 71 Center part 72 Side part 77 Slot hole 150 Movable plate 250 Movable plate 251 Support part 252 Extension part 253 End part AB Airbag device AC Actuator F2 Seat back frame S Vehicle seat S1 Seat cushion S2 Seat back W1 Upper support wire W2 Lower support wire W11 Bending part

Claims (13)

A vehicle seat comprising a seat cushion and a seat back, wherein the seat back includes a seat back frame constituting a frame of the seat back, and a seat back pad covering the seat back frame,
The seat back pad has a central portion facing the upper back of the occupant, and left and right side portions provided on the left and right sides of the central portion and projecting forward from the central portion,
The seat back is out of the left and right side portions, the portion facing the portion below the base of the occupant's arms, is constructed so as to bulge toward the occupant than the portion facing the other parts of the occupant ,
An occupant support member provided in the seat back and bulging a portion of the side facing the base of the occupant's arm of the occupant;
The occupant support member is
A movable member in which one end portion is supported so as to be movable in a direction approaching or separating from the other end portion and the bending state is changed;
A vehicle seat , comprising: a support member that is disposed between the movable member and the side portion and that bulges the side portion by being pushed by the movable member . The vehicle seat according to claim 1, further comprising a guide portion that guides one end portion of the movable member so as to be movable toward or away from the other end portion. The vehicle seat according to claim 1, wherein one end portion of the support member in the left-right direction is a free end. A vehicle seat comprising a seat cushion and a seat back, wherein the seat back includes a seat back frame constituting a frame of the seat back, and a seat back pad covering the seat back frame,
The seat back pad has a central portion facing the upper back of the occupant, and left and right side portions provided on the left and right sides of the central portion and projecting forward from the central portion,
The seat back is out of the left and right side portions, the portion facing the portion below the base of the occupant's arms, is constructed so as to bulge toward the occupant than the portion facing the other parts of the occupant ,
An occupant support member provided in the seat back and bulging a portion of the side facing the base of the occupant's arm of the occupant;
The occupant support member is
It is plate-shaped and is configured to be able to change the bulge amount of the side portion by changing the amount of bending, and the top portion that bulges toward the occupant when bent is extended along the vertical direction,
A plate-like support portion extending in the left-right direction, and an extension portion extending from a middle portion in the left-right direction of the surface opposite to the surface facing the occupant of the support portion,
An outer end portion in the left-right direction of the support portion is fixed, an end portion of the extension portion is supported so as to be movable in a direction approaching or separating from the outer end portion, and an inner end in the left-right direction of the support portion A vehicle seat characterized in that the portion is a free end . A vehicle seat comprising a seat cushion and a seat back, wherein the seat back includes a seat back frame constituting a frame of the seat back, and a seat back pad covering the seat back frame,
The seat back pad has a central portion facing the upper back of the occupant, and left and right side portions provided on the left and right sides of the central portion and projecting forward from the central portion,
The seat back is out of the left and right side portions, the portion facing the portion below the base of the occupant's arms, is constructed so as to bulge toward the occupant than the portion facing the other parts of the occupant ,
An occupant support member provided in the seat back and bulging a portion of the side facing the base of the occupant's arm of the occupant;
The occupant support member is plate-shaped, and an outer end portion in the left-right direction is fixed, and an inner end portion in the left-right direction is supported so as to move in a direction approaching or separating from the outer end portion. By changing, it is configured to be able to change the amount of swelling of the side portion, the top portion that bulges toward the occupant when curved, extends along the vertical direction,
The seat back frame is mounted so as to connect the left and right side frames having projecting portions facing each other in the left-right direction and having a lower portion projecting forward from the upper portion, and the upper portion of the side frame and the projecting portion. A connected wire,
The vehicle occupant support member, wherein the outer end is fixed to the connecting wire . A vehicle seat comprising a seat cushion and a seat back, wherein the seat back includes a seat back frame constituting a frame of the seat back, and a seat back pad covering the seat back frame,
The seat back pad has a central portion facing the upper back of the occupant, and left and right side portions provided on the left and right sides of the central portion and projecting forward from the central portion,
The seat back is out of the left and right side portions, the portion facing the portion below the base of the occupant's arms, is constructed so as to bulge toward the occupant than the portion facing the other parts of the occupant ,
A main body portion, and one end portion of the main body portion is supported so as to be movable toward or away from the other end portion; An occupant support member for changing the amount
An inner cable and an outer cable through which the inner cable is slidably inserted, and the inner cable includes a cable that moves the main body by sliding relative to the outer cable;
The occupant support member is provided at one end portion of the main body portion, and is fixed to one end portion of the outer cable, and is provided at the other end portion of the main body portion. An inner cable fixing portion to which one end portion is fixed;
The vehicle seat according to claim 1, wherein the outer cable fixing portion and the inner cable fixing portion are provided on a surface of the main body portion opposite to a surface facing the occupant . A vehicle seat comprising a seat cushion and a seat back, wherein the seat back includes a seat back frame constituting a frame of the seat back, and a seat back pad covering the seat back frame,
The seat back pad has a central portion facing the upper back of the occupant, and left and right side portions provided on the left and right sides of the central portion and projecting forward from the central portion,
The seat back is out of the left and right side portions, the portion facing the portion below the base of the occupant's arms, is constructed so as to bulge toward the occupant than the portion facing the other parts of the occupant ,
An occupant support member that is supported so as to be movable in a direction in which one end portion approaches or separates from the other end portion and changes the amount of bending, thereby changing the bulge amount of the side portion;
A rod-shaped member fixed to the seat back frame,
The occupant support member has a through hole at the one end, and the through hole is inserted into the rod-shaped member, so that the one end is movable along the rod-shaped member. A vehicle seat characterized by being supported . 8. The top of the occupant support member that bulges toward the occupant is disposed on the inner side in the left-right direction of the left and right side frames of the seat back frame, according to claim 4. The vehicle seat described. The occupant support member has a plate shape and is configured to be able to change the bulge amount by changing the amount of bending, and a top portion that bulges toward the occupant when bent is extended along the vertical direction. The vehicle seat according to claim 6 or 7 , wherein the vehicle seat is characterized by the following. 5. The occupant support member is supported by an outer end portion in a left-right direction that is fixed, and an inner end portion in a left-right direction is supported so as to be movable toward or away from the outer end portion. Alternatively, the vehicle seat according to claim 9 . An airbag device that protects an occupant from the side, and a drive device that deforms or moves the occupant support member in order to change the amount of bulging of the side portion,
The airbag apparatus, the mounted on one of the left and right side frames of the seat back frame, wherein the drive device, of claims 1 to 10, characterized in that attached to the other of said left and right side frames The vehicle seat according to any one of claims. Said seat back pad, claim 1, characterized in that the slot hole penetrating at positions corresponding to the passenger supporting member in the vertical direction between the central portion and the left and right side portions are provided The vehicle seat according to claim 11 . The seat back frame includes a support wire provided between the left and right side frames to support the upper body of the occupant.
The support wire has a bent portion that is bent so as to be convex upward or downward,
The occupant support member, a vehicle seat according to any one of claims 1 to 12, wherein the disposed opposite to the recessed shape to become part of the bent portion.

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