JP6064922B2 - Vehicle seat device - Google Patents

Description

  The present invention belongs to a technical field related to a vehicle seat device using a net member for a seat back.

  Generally, the seat back of a vehicle seat device includes a spring or a urethane pad that receives a load that the seated occupant tends to lean on the seat back in order to maintain the posture and comfort of the seat occupant of the vehicle seat device. Is used.

  Also, in recent years, for the purpose of reducing the weight of a vehicle seat device, improving vibration absorption performance, and impact absorption performance, instead of using a spring or urethane pad, a net member having a good elasticity and having a cushion function should be used. Has been proposed. For example, Patent Document 1 discloses a seat structure in which a net member is stretched between left and right side portions of a seat back frame.

  Here, at the time of rear-end collision of the vehicle, an impact load to the seat occupant acts on the seat occupant, and the upper body (particularly the waist) of the seat occupant tends to be displaced rearward relative to the seat back. . At this time, if the head of the seated occupant tilts too far backward with respect to the upper body, the neck becomes a so-called whipping state. In order to support the head of the seated occupant with the headrest in order to suppress this whiplash state, the headrest is conventionally displaced forward by a load acting on the seated occupant during the rear impact of the vehicle. The headrest is fixed so that it cannot move during a rear-end collision of the vehicle, and a structure that allows rearward displacement of the seated occupant's waist is adopted.

  For example, in Patent Document 2, a pair of side frames attached to a seat cushion frame are provided with an upper rotary hinge and a lower fastening member as a structure that allows the headrest to be fixed and allows a rearward displacement of the waist of the seated occupant. When the seated occupant is normally seated, the seatback frame is fixed to the side frame by the fastening member, and when a load exceeding a predetermined value is input from the rear of the vehicle, the seatback is moved by the seated occupant. It is disclosed that the lower part of the frame is pressed and the fastening member moves backward while deforming the shock absorbing means, thereby swinging the seat back frame around the rotary hinge. In this configuration, the pressure receiving portion that receives the load from the seated occupant during the rear-end collision of the vehicle is a spring that is bridged between the left and right side portions of the seat back frame and that corresponds to the waist of the seated occupant. By receiving a load from the seated occupant, the lower portion of the seat back frame, and thus the fastening member, moves rearward. The thing of this patent document 2 is a general seat apparatus which does not use a net member, and the urethane pad with comparatively thick thickness is provided in the seat front side (seating occupant side) of the spring as the pressure receiving part.

  Further, in Patent Document 1 using a net member, when the seat back receives a load from the seated occupant during a rear-end collision of the vehicle, the net support portion of the seat back frame is deformed so that the upper body of the seated occupant is It is comprised so that it may sink into the hollow part of a seat back frame with a member.

JP 2009-202757 A JP 2005-186670 A

  However, in the configuration of Patent Document 1, since the seat back frame itself is deformed, the deformation strength of the seat back frame is prevented so that the seat back frame is not deformed at the time of normal seating of the seated occupant, but is deformed at the rear impact of the vehicle. Adjustment is required. Further, since the net member has elasticity, the force for deforming the seat back frame at the time of rear collision is absorbed by the elongation of the net member, and the seat back frame is not easily deformed stably. On the other hand, when the elongation of the net member is suppressed, the sitting comfort is deteriorated when the seated occupant is normally seated.

  In Patent Document 2, since the pressure receiving portion is a spring and a thick urethane pad is provided on the front side thereof, the force for swinging the seat back frame is the same as that of Patent Document 1, and the urethane pad or spring is used. Will be absorbed.

  Therefore, in the seat device using the net member, as described in Patent Document 2, a highly rigid pressure receiving portion that receives a load from the seated occupant at the time of a rear collision of the vehicle, for example, a height position corresponding to the waist of the seated occupant In addition, when the pressure receiving portion receives a load from the seated occupant, the movable member (displacement is prevented during normal seating of the seated occupant) is displaced, and the pressure receiving portion is disposed immediately behind the net member. It is conceivable that the upper body (particularly the waist) can be moved backward.

  However, if a pressure receiving portion having high rigidity is provided immediately behind the net member, the pressure receiving portion abuts against the seated occupant during normal sitting of the seated occupant, and the sitting comfort is deteriorated.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a vehicle seat device that uses a net member and a seat occupant of the vehicle seat device during a rear-end collision of the vehicle. When the rearward movement of the body is allowed, the upper body of the seated occupant is stably moved rearward at the rear impact of the vehicle without sacrificing the sitting comfort of the seated occupant during normal seating. There is to get.

  In order to achieve the above object, the present invention includes a seat back provided with a seat back frame having a pair of left and right side frame portions extending in the vertical direction, and a headrest fixed to the upper portion of the seat back. For a vehicle seat device, a movable member having a pair of left and right vertically extending frame portions that extend in the vertical direction and are pivotally supported around a pivot point with respect to the pair of left and right side frame portions, and Stretched between a pair of left and right side frame portions, and supports a load of a seated occupant of the vehicle seat device and has a cushion function, and stretched between the pair of left and right vertically extending frame portions. In the installed state, the first net member is provided integrally with or separately from the first net member, supports the load of the seated occupant, and functions as a cushion. The movable member is provided below the shaft fulcrum and receives a load from the seated occupant at the time of rear collision of the vehicle from the shaft fulcrum in the vertically extending frame portion. Each further includes a pressure receiving portion that rotates the lower portion around the pivot point toward the rear of the vehicle, and the pressure receiving portion has higher rigidity than the first and second net members, and the tension of the second net member. A normal seating of the seated occupant is located at a height position substantially the same as the lowest end of the installed position or a height position below the extended position, and between the vertically extending frame portion and the seat back frame. Sometimes, the pressure receiving portion prevents the seat from the seat occupant during the rear impact of the vehicle while preventing the rearward rotation of the lower portion of the vertically extending frame portion from the shaft fulcrum around the shaft fulcrum. By receiving It has a structure that, rotation preventing means to permit rotation of the shaft fulcrum of the vehicle rear of the lower portion than the shaft supporting point is provided in the frame portion.

  With the above configuration, the pressure receiving portion is located at a height position that is substantially the same as the lowest end of the extending position of the second net member or at a height position below the extending position. Even if there is no member, it can be provided at a height position that does not affect the comfort of the occupant (for example, a position corresponding to the buttocks of the seated occupant), and deterioration of sitting comfort by the pressure receiving part can be suppressed. Further, since the extending position of the second net member is closer to the pivot point than the pressure receiving portion, even if the vertically extending frame portion is rotated through the second net member at the time of rear collision of the vehicle, the pressure receiving Since a larger load is required than when rotating the vertically extending frame part via the part, it is difficult to rotate the vertically extending frame part via the second net member having a cushion function, As a result, the vertically extending frame portion rotates when the pressure receiving portion receives a load from the seated occupant. As a result, the tension of the second net member can be set by focusing only on the normal seating without considering the elongation at the time of rear collision, and this also suppresses the deterioration of the sitting comfort of the occupant. be able to.

  Further, since the vertically extending frame portion rotates at the time of a rear collision of the vehicle, the upper body of the seated occupant stably moves rearward. Here, since the second net member stretched between the pair of left and right vertically extending frame portions is provided below the first net member, the second net member is positioned corresponding to the waist of the seated occupant. By providing the seat, the waist part that the seated occupant wants to move most backward at the time of a rear-end collision can be moved rearward.

  Therefore, the rear movement of the upper body (especially the waist) of the seated occupant can be performed stably without sacrificing the sitting comfort of the seated occupant during normal seating.

  In the vehicle seat device, the vertically extending frame portion extends downward from the pivot point to near the lower end of the seat back, and the pressure receiving portion is provided near the lower end of the vertically extending frame portion. It is preferable.

  As a result, the pressure receiving portion can be provided at a height position of the seat occupant's buttocks, and a certain amount of gap is generated between the seat occupant's buttocks and the seat back of the seat back. Deterioration of sitting comfort can be minimized. In addition, the clearance allows the pressure receiving portion to be disposed relatively close to the seated occupant. As a result, the load from the seated occupant can be quickly transmitted to the pressure receiving portion at the time of rear-end collision of the vehicle. become able to.

  As described above, according to the vehicle seat device of the present invention, the movable member having the pair of left and right vertically extending frame portions that are pivotally supported about the pivot points with respect to the pair of left and right side frame portions. The lower portion of the vertically extending frame portion below the shaft fulcrum is provided around the shaft fulcrum in response to a load from a seated occupant of the vehicle seat device at the time of a rear collision of the vehicle. The second net member is extended to a rear side of the first net member and is further extended to a pair of left and right vertically extending frame portions. Is located at a height position substantially the same as the lowermost end of the upper or lower position than the extended position, between the vertically extending frame portion and the seat back frame, during normal seating of the seated occupant, In the upper and lower extension frame While the vehicle is prevented from pivoting to the rear of the vehicle around the pivot point at the lower part of the pivot point, the pressure receiving part receives a load from the seated occupant during the rear impact of the vehicle. A rotation preventing means for allowing the vehicle to rotate rearward about the pivot point at a lower portion than the pivot point in the installation frame portion is provided, so that a seated occupant of the seat device can sit in a normal position. Without sacrificing comfort, it is possible to stably move the upper body (especially the waist) of the seated occupant during the rear impact of the vehicle and prevent the neck of the seated occupant from whipping. be able to.

1 is a perspective view showing a vehicle seat device according to an embodiment of the present invention. It is a perspective view which shows the internal structure (The state which remove | eliminated the skin material for a seat cushion, a net member, the skin material for a seat back, a 1st net member, and a 2nd net member) of the vehicle seat apparatus of FIG. It is a perspective view which shows the state which attached the net member for seat cushions, the 1st net member for seat back, and the 2nd net member with respect to the state of FIG. It is a principal part perspective view which shows an example of a rotation prevention means. It is the figure seen from the sheet | seat side which shows the back side outline line and vertical extension frame part of the body at the time of the normal seating of the seating passenger | crew of a vehicle seat apparatus. FIG. 6 is a view corresponding to FIG. 5 illustrating a rear outline line and a vertically extending frame portion of the seated occupant in the early stage of a rear collision of the vehicle. FIG. 6 is a view corresponding to FIG. 5, showing a rear outline line and a vertically extending frame portion of the seated occupant in the late rear impact period of the vehicle. It is a principal part perspective view which shows the other example of a rotation prevention means.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 3 show a vehicle seat device 1 according to an embodiment of the present invention. The seat device 1 is provided in a vehicle such that the seat width direction (left-right direction) coincides with the vehicle width direction of the vehicle and the front side of the seat faces the front side of the vehicle.

  The seat device 1 includes a seat cushion 2, a seat back 4 whose lower end portion is connected to a rear end portion of the seat cushion 2 so as to be rotatable (reclining), and a headrest 5 attached and fixed to an upper portion of the seat back 4. And. In the present embodiment, the headrest 5 cannot be detached from the seat back 4, but may be detachably attached to the seat back 4. In short, an active headrest structure in which the headrest is displaced forward by a load acting on the seated occupant of the seat device 1 at the time of a rear collision of the vehicle may be a fixed headrest structure in which the headrest does not move at the time of the rear collision of the vehicle.

  On the right side of the seat cushion 2 (the left side in FIG. 1), the seat occupant of the seat device 1 manually operates, the tilt lever 6 for swinging the seat cushion 2 up and down, and also the seat occupant manually operates A reclining lever 7 (see FIGS. 2 and 3) for reclining the seat back 4 is provided.

  A slide mechanism 8 is provided below the seat cushion 2 to slidably support the seat cushion 2 in the seat front-rear direction (vehicle front-rear direction) with respect to the vehicle body floor. The slide mechanism 8 includes a pair of left and right guide rails 10 that extend in the vehicle front-rear direction and is fixed to the vehicle body floor, and a pair of left and right sliders 12 that are slidably engaged with the two guide rails 10. Has been.

  The seat cushion 2 is disposed between the pair of left and right plate-like side frames 14 fixed to the pair of sliders 12 and the pair of side frames 14, and is supported by the side frames 14 in plan view. A substantially U-shaped pipe frame 16 that opens rearwardly, a front stabilizer pipe 18 that connects the front portions of the pair of side frames 14 in the seat width direction, and a rear portion of the pair of side frames 14 that connects in the seat width direction. And a rear stabi pipe 20. A knuckle member 15 is fixed to the rear end portion of each side frame 14.

  A net member 40 for the seat cushion 2 that supports the load of the seated occupant and has a cushion function is stretched between the left and right side portions 16a of the substantially U-shaped pipe frame 16. The net member 40 is made of an extensible fabric and is covered with a skin material 41 (see FIG. 1) for the seat cushion 2. Thin urethane may be disposed between the skin material 41 and the net member 40.

  A plurality of slits 40 a are formed in the left and right ends of the net member 40 side by side in the front-rear direction of the seat. On the other hand, a plurality of hook members 28 are provided on the left and right side portions 16a of the pipe frame 16 so as to correspond to the slits 40a. The hook members 28 are inserted into the slits 40a, whereby the left and right ends of the net member 40 are locked to the hook members 28. Thus, the net member 40 is placed between the left and right side portions 16a of the pipe frame 16 in the seat width. Will be stretched in the direction.

  The seat back 4 has a seat back frame 24 for supporting the seat back 4 itself. The seat back frame 24 includes a pair of left and right side frame portions 24a extending in the vertical direction, an upper frame portion 24b extending in the seat width direction connecting the upper ends of the pair of side frame portions 24a, and a pair of side frames. A lower frame portion 24c that connects the lower end portions of the portion 24a and extends in the seat width direction.

  The upper frame portion 24b is constituted by a pipe member 25 formed in a substantially inverted U shape, and the lower frame portion 24c is constituted by a plate-like member 26 formed in a substantially U shape. The upper part of each side frame portion 24a is constituted by the pipe material 25, the lower part is constituted by the plate-like member 26, and the central portion in the vertical direction is constituted by the pipe material 25 and the plate-like member 26. Thus, the pipe member 25 and the plate-like member 26 are joined to each other by welding in a state where they overlap each other in the sheet width direction. A headrest frame 31 is fixed to the upper frame portion 24b. Thus, the headrest 5 is fixed to the seat back frame 24 of the seat back 4.

  A lower end portion of each side frame portion 24 a is supported by a rotation support shaft 27 for reclining the seat back 4. The rotation support shaft 27 is provided between a pair of left and right knuckle members 15 fixed to the pair of left and right side frames 14, and both ends of the rotation support shaft 27 are respectively connected to the pair of left and right knuckle members 15. It is supported. As a result, the seat back 4 can be rotated (swinged) in the front-rear direction of the seat around the rotation support shaft 27 located at the lower end thereof.

  As shown in FIG. 2, the seat back 4 is provided with a movable member 51 that is movable (turned) at the time of a rear collision of the vehicle. The movable member 51 includes a pair of left and right vertically extending frame portions 52 (in FIG. 3, only the right and left vertically extending frame portions are visible) extending in the vertical direction, and the lower end portions of the pair of vertically extending frame portions 52. It is comprised with the rod-shaped connection member 53 extended in the sheet | seat width direction which connects mutually. The connecting member 53 constitutes a pressure receiving portion of the present invention as will be described later. In the present embodiment, the vertically extending frame portion 52 and the connecting member 53 are made of metal.

  Each of the vertically extending frame portions 52 is a surface on the inner side of the seat in a lower portion of each side frame portion 24a (a portion constituted by only the plate member 26 of the pipe member 25 and the plate member 26 constituting the side frame portion 24a). Are provided respectively. As shown in FIG. 4, the upper end portions of the vertically extending frame portions 52 are rotatably supported by the plate-like member 26 by stepped bolts 55 serving as shaft support points. As a result, when the connecting member 53 receives a load from the front side of the seat, the lower portion of the pair of vertically extending frame portions 52 than the shaft fulcrum rotates around the shaft fulcrum toward the rear of the vehicle (seat rear). It will be. However, in the present embodiment, as will be described later, the vertically extending frame portion 52 is prevented from rotating unless the connecting member 53 receives a load of a predetermined value or more as in a rear collision of the vehicle. .

  As shown in FIG. 3, between the pipe members 25 in the pair of left and right side frame portions 24a, a seat that supports the load of the seated occupant (the backrest load on the upper side of the waist) and has a cushion function. First net members 43 and 44 for the back 3 are stretched. The left and right pipe members 25 are each provided with a plurality of hook members 29 similar to the hook members 28 arranged in the vertical direction, and the hook members 29 are inserted into the left and right ends of the first net member 43. A plurality of slits 43a similar to the slits 40a of the net member 40 are formed side by side in the vertical direction.

  Below the first net member 43, a second net member 44 for the seat back 3 that supports the load of the seated occupant (back load on the waist) and has a cushion function is the first net member 43. And is provided integrally. The second net member 44 is made of the same extensible fabric as the first net member 43 and is integrally formed with the first net member 43. The second net member 44 is stretched between a pair of left and right vertically extending frame portions 52. In other words, the vertically extending frame portion 52 is provided with a plurality of hook portions 52 a arranged in the vertical direction, and a plurality of slits 44 a through which the hook portions 52 a are inserted are provided at the left and right end portions of the second net member 44. It is formed side by side in the vertical direction. Note that the second net member 44 may be provided separately from the first net member 43, and the material of the second net member 44 may be different from that of the first net member 43.

  The second net member 44 is provided at a height position corresponding to the waist of the seated occupant. Further, the shaft fulcrum (stepped bolt 55) of the vertically extending frame portion 52 is provided at a position higher than the waist portion (in the present embodiment, a position near the upper side of the waist portion), and the vertically extending frame portion 52 is The shaft fulcrum extends downward to the vicinity of the lower end of the seat back 4. The connecting member 53 is a position below the shaft fulcrum, and in the present embodiment, is provided in the vicinity of the lower end of the vertically extending frame portion 52, that is, at a position corresponding to the buttocks of the seated occupant. As a result, the connecting member 53 is positioned at substantially the same height position as the lowest end of the extended position of the second net member 44 or at a lower height position than the extended position.

  The first and second net members 43 and 44 are covered with a skin material 45 for the seat back 3 (see FIG. 1). Thin urethane may be disposed between the skin material 45 and the first and second net members 43 and 44.

  At the time of rear-end collision of the vehicle, the upper body of the seated occupant of the seat device 1 moves rearward relative to the seatback 4, whereby the buttocks of the seated occupant press the connecting member 53 rearward. For this reason, the connecting member 53 serves as a pressure receiving portion that receives a load from the seated occupant during a rear-end collision of the vehicle. Here, since the connecting member 53 is made of metal, it has higher rigidity than the first and second net members 43 and 44. Thus, even if the rigidity of the connecting member 53 is high, the connecting member is in a position corresponding to the buttocks of the seated occupant (particularly at a height that does not affect the comfort of the occupant even without the net member). There is no deterioration in comfort.

  As shown in FIG. 4, a tension coil spring 58 is bridged between the lower end portion of the vertically extending frame portion 52 and the plate-like member 26 of the seat back frame 24. The tension coil spring 58 is a hard spring capable of preventing the rearward rotation of the lower portion of the vertically extending frame portion 52 around the shaft fulcrum around the shaft fulcrum when the seated occupant is normally seated. It is. As a result, even if the seated occupant falls on the seat back 4, the second net member 44 only extends, and the vertically extending frame portion 52 does not rotate via the second net member 44. On the other hand, at the time of a rear collision of the vehicle, the connecting member 53 receives a load of a predetermined value or more from the seated occupant, so that the lower portion of the vertically extending frame portion 52 from the shaft fulcrum is around the shaft fulcrum. At this time, the tension coil spring 58 can be extended, and the vertically extending frame portion 52 is rotated around the pivot point while the tension coil spring 58 is extended. Accordingly, when the seated occupant is normally seated, the tension coil spring 58 prevents the rearward rotation of the vehicle around the shaft fulcrum of the lower portion of the vertically extending frame portion 52 around the shaft fulcrum. At the time of a collision, the connecting member 53 (pressure receiving portion) receives a load from the seated occupant, so that the lower portion of the vertically extending frame portion 52 is pivoted to the rear of the vehicle around the shaft fulcrum. An allowable rotation preventing means is configured. Note that the tension coil spring 58 may be configured to be elastically deformed at the time of the rear collision of the vehicle. For example, the tension coil spring 58 may be configured to be plastically deformed by reducing the number of turns of the spring.

  FIG. 5 shows a rear outline line L1 of the body and a vertically extending frame portion 52 when the seated occupant of the seat device 1 normally sits, and FIG. 6 shows the rear side of the seated occupant in the early stage of the rear impact of the vehicle. The outline line L1 and the vertically extending frame portion 52 are shown, and FIG. 8 shows the rear outline line L1 and the vertically extending frame portion 5 of the body of the seated occupant in the late stage of the rear impact of the vehicle. The line L2 indicated by the alternate long and short dash line is a line at the position of the end portion in the sheet width direction of the first and second net members 43, 44, but the position of the intermediate portion in the sheet width direction of the first and second net members 43, 44. Is located on the rear side of the seat with respect to the line L2 by the first and second net members 43 and 44 extending to the rear side of the seat in response to the backrest load from the seated occupant, and the rearmost line is Thus, it coincides with the rear outline line L1 of the seated occupant.

  When the seated occupant is normally seated by the tension coil spring 58, the second net member 44 only extends, and the vertically extending frame portion 52 rotates around the shaft fulcrum via the second net member 44. Absent. Further, the connecting member 53 is provided at a height position corresponding to the buttocks of the seated occupant, and at this height position, the seated occupant is not in contact with the second net member 44, and the connecting member 53 and the seated seat There is a gap with the passenger (see FIG. 5). As a result, the connecting member 53 with high rigidity does not hit the body of the seated occupant and the sitting comfort does not deteriorate.

  At the time of rear-end collision of the vehicle, an impact load on the seat occupant side (for example, a load of 10 times or more of the backrest load at the time of normal seating) acts on the seat occupant, and the seat occupant is relative to the seat back 4 Is displaced backwards. As a result, the first and second net members 43 and 44 extend to the rear side of the seat larger than in normal seating, and the buttocks of the seated occupant abut against the connecting member 53 (see FIG. 6). When the seat occupant's buttocks further displace to the rear side of the seat, the connecting member 53 receives a load from the seated occupant, and the lower part of the vertically extending frame portion 52 is below the shaft fulcrum through the connecting member 53. Tries to rotate backward about the shaft fulcrum. At this time, the tension coil spring 58 extends, and the vertically extending frame portion 52 rotates around the shaft fulcrum (see FIG. 7). Here, since the extended position of the second net member 44 is closer to the pivot point than the connecting member 53, the vertically extending frame portion 52 is rotated via the second net member 44 at the time of rear collision of the vehicle. Even if it tries to make it, since a bigger load is required than when rotating the vertically extending frame portion 52 via the connecting member 53, the vertically extending frame portion 52 via the second net member 44 having a cushion function. As a result, the vertically extending frame portion 52 is rotated when the connecting member 53 receives a load from the seated occupant. As a result, the tension of the second net member 44 can be set by focusing only on the normal seating without considering the elongation at the time of the rear impact of the vehicle, and this also reduces the passenger's sitting comfort. Can be suppressed. Further, by the rotation of the vertically extending frame part 52, the waist part of the seated occupant that is desired to move most rearward at the time of a rear collision can be stably moved rearward.

  Accordingly, in this embodiment, the upper body (especially the waist) of the seated occupant is stably moved rearward at the rear impact of the vehicle without sacrificing the sitting comfort of the seated occupant of the seat device 1 during normal seating. It is possible to prevent the neck of the seated occupant from whipping.

  The present invention is not limited to the embodiment described above, and can be substituted without departing from the spirit of the claims.

  For example, in the above-described embodiment, the rotation preventing means of the present invention is configured by the tension coil spring 58, but is not limited thereto, and may be configured by, for example, a plate spring member 59 as shown in FIG. . The leaf spring member 59 extends in the front-rear direction of the seat, and intersects the vertically extending frame portion 52 through the plate-like member 26 side. The rear end portion of the leaf spring member 59 is fixed to the plate member 26 by caulking with a rivet 60. In this leaf spring member 59, a protrusion that is bent in a substantially triangular shape when viewed from above on the front side of the rear end portion fixed to the plate-like member 26 and on the rear side of the seat of the vertically extending frame portion 52 and protrudes to the inside of the seat. A portion 59a is formed. When the seated occupant of the seat device 1 is normally seated, the leaf spring member 59 is rotated around the shaft fulcrum at a lower portion than the shaft fulcrum (stepped bolt 55) in the vertically extending frame portion 52 by the protrusion 59a. Prevents the vehicle from turning backwards. On the other hand, at the time of rear collision of the vehicle, the connecting member 53 receives a load of a predetermined value or more from the seated occupant, so that it can get over while deforming the protruding portion 59a, and the vertically extending frame portion 52 protrudes. It rotates around the pivot point while getting over the portion 59a.

  Alternatively, instead of the tension coil spring 58, a wire member is stretched between the vertically extending frame portion 52 and the plate-like member 26, and the vertically extending frame portion 52 of the wire member is placed on the wire member at the time of rear collision of the vehicle. The U-shaped end portion (the same shape as the end portion hooked on the vertically extending frame portion 52 in the tension coil spring 58) to be hooked and the U-shaped end portion (in the tension coil spring 58 in the wire member 26) to be hooked on the plate-like member 26. At least one of the same shape as the end hooked on the plate member 26 may be deformed and removed.

  The above-described embodiments are merely examples, and the scope of the present invention should not be interpreted in a limited manner. The scope of the present invention is defined by the scope of the claims, and all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  The present invention is useful for a vehicle seat apparatus using a net member for a seat back.

DESCRIPTION OF SYMBOLS 1 Vehicle seat apparatus 4 Seat back 5 Headrest 24 Seat back frame 24a Side frame part 43 1st net member 44 2nd net member 51 Movable member 52 Vertically extending frame part 53 Connection member (pressure receiving part)
58 Tensile coil spring (turning prevention means)
59 Leaf spring member (rotation prevention means)

Claims (2)

A vehicle seat device comprising: a seat back provided with a seat back frame having a pair of left and right side frame portions extending in a vertical direction; and a headrest fixed to an upper portion of the seat back,
A movable member having a pair of left and right vertically extending frame parts that extend in the vertical direction and are pivotally supported around the pivot points with respect to the pair of left and right side frame parts;
A first net member that is stretched between the pair of left and right side frame portions, supports a load of a seated occupant of the vehicle seat device, and has a cushion function;
In a state of being stretched between the pair of left and right vertically extending frame portions, the first net member is provided integrally or separately on the lower side of the first net member to support the load of the seated occupant. And a second net member having a cushion function,
The movable member is provided below the shaft fulcrum and receives a load from the seated occupant during a rear-end collision of the vehicle, and moves a portion below the shaft fulcrum in the vertically extending frame portion around the shaft fulcrum. Further includes a pressure receiving portion for rotating the vehicle rearward,
The pressure receiving portion has higher rigidity than the first and second net members, and is substantially the same height position as the lowest end of the tension position of the second net member, or a height below the tension position. Located in position
When the seated occupant is normally seated between the vertically extending frame portion and the seat back frame, the vehicle is rotated around the shaft fulcrum in the lower portion of the vertically extending frame portion around the shaft fulcrum. While preventing the movement, the rear side of the vehicle around the pivot point in the lower portion of the vertical fulcrum in the vertically extending frame portion receives the load from the seated occupant during the rear impact of the vehicle. A vehicular seat device characterized in that it is provided with a rotation preventing means for allowing rotation to the vehicle. The vehicle seat device according to claim 1,
The vertically extending frame portion extends downward from the pivot point to near the lower end of the seat back,
The vehicle seat device according to claim 1, wherein the pressure receiving portion is provided in the vicinity of a lower end of the vertically extending frame portion.

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