JP2017206123A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular seat that can effectively exert an impact absorbing function according to a height position of a seat main body at the time when an external load is inputted thereto.SOLUTION: A seat 1 comprises an inner side frame 21, an outer side frame 22, an inner link part 5 and an outer link part 6. The inner side frame 21 and the outer side frame 22 are configured to be able to adjust a height position of the seat main body 10 relative to a floor F side. The inner link part 5 is provided with a deformed part 53 and the outer link part 6 is provided with a step part 63. The deformed part 53 is configured to be more fragile than the step part 63. The deformed part 53 is configured to buckle more preferentially than the step part 63 when an external load is inputted thereto in a first projected state, and the step part 63 is configured to buckle more preferentially than the deformed part 53 when an external load is inputted thereto in a second projected state.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a vehicle seat.

  Conventionally, an automobile or the like provided with a pair of frame members constituting the skeleton of the seat body, and a plurality of link members having one end connected to the frame member and the other end rotatably connected to the vehicle floor side Vehicle seats used in are known. The vehicle seat is configured to be able to adjust the height position of the seat body with respect to the vehicle floor surface side by rotating around the other ends of the plurality of link members to undulate the plurality of link members.

  For example, Patent Document 1 discloses that when a frame member is deformed by receiving a load from an occupant side seated on the seat body during a rear collision of a vehicle (hereinafter referred to as a rear collision), the load Discloses a vehicle seat (vehicle seat height adjusting device) having an impact absorbing function, in which a deforming portion for deforming the link member is formed on the link member.

JP 2011-173497 A

  In the vehicle seat, the height position of the seat body differs depending on the occupant seated in the seat body. Therefore, the impact absorption function is effectively demonstrated in accordance with the height position of the seat body when a load is input from the outside to the vehicle seat, such as when the vehicle has a rear impact (hereinafter referred to as an external load input). It is hoped that it can be done.

  The present disclosure provides a vehicle seat that can effectively exhibit an impact absorbing function in accordance with the height position of the seat body when an external load is input.

  A vehicle seat according to one aspect of the present disclosure constitutes a skeleton of a seat body on which a passenger sits, and a pair of frame members disposed opposite to each other in the width direction of the vehicle seat, and one end of a pair of frame members One side link portion having at least one one side link member connected to one frame member side and the other end rotatably connected to the vehicle floor side, and one end of the other of the pair of frame members The other side link part which has the at least 1 other side link member connected to the frame member side of this, and the other end was rotatably connected to the vehicle floor surface side. One frame member and the other frame member are pivoted about the other end of the one side link member and the other end of the other side link member, and the one side link member and the other side link member undulate, thereby the seat body It is comprised so that adjustment of the height position with respect to the vehicle floor side is possible. The one side link member of the one side link portion is provided with one weak portion that can buckle when an external load is input, and the other side link member of the other side link portion is buckled when an external load is input. A fragile part is provided, and one fragile part is configured to be more fragile than the other fragile part. The one side link member and the other side link member are configured to buckle preferentially over the other side weak portion when the external load is input in the first undulation state of the one side link member and the other side link member. When the external load is input in the second undulation state where the member stands up from the first undulation state, the other side weak part is configured to buckle preferentially over the one side weak part.

  According to the vehicle seat, when the external load is input in the first undulation state (for example, at the time of rearward collision of the vehicle), the one weak portion is buckled preferentially over the other weak portion, and the second When the external load is input in the undulating state, the other side fragile portion can be buckled preferentially over the one side fragile portion. That is, the part which buckles preferentially at the time of external load input differs according to the undulation state of the one side link member and the other side link member. Therefore, the impact absorbing function can be effectively exhibited in accordance with the height position of the seat body at the time of external load input.

  In the vehicle seat, the first undulation state may be a downmost state in which the inner link member and the outer link member are most lying down. In this case, at the time of external load input in the down-most state where the inner link member and the outer link member are closest to the vehicle floor surface side, one of the inner fragile portion and the outer fragile portion has priority over the other. Can be buckled. As a result, the shock absorbing function can be reliably exhibited even in the down-most state.

  The one-side link portion includes a one-side front link member and a one-side rear link member that are one-side link members connected to the front side and the rear side of the seat body on one frame member side, The side link portion includes the other side front link member and the other side rear link member which are the other side link members connected to the front side and the rear side of the seat body on the other frame member side, and the one side rear link. The member may be provided with one weak portion, and the other rear link member may be provided with the other weak portion. In this case, by providing the one side fragile portion and the other side fragile portion on the one side rear link member and the other side rear link member arranged on the rear side of the seat main body that are likely to receive an external input load, The shock absorbing function can be exhibited more effectively at the time of load input.

  Further, the one-side fragile portion has a hole provided in a rear edge portion of the one-side link member, and is deformed by a deforming portion that abuts on the vehicle floor surface and deforms when an external load is input in the first undulation state It may be configured. In this case, it is suitable as a structure of the one side weak part. In addition, the rear side edge part of the one side link member is a rear side edge part of the one side link member in the standing state.

  The other weak portion is provided at the front edge of the other link member, and is a notch that is bent when an external load is input in the second undulation state, and an extension that connects both ends of the other link member. You may be comprised including at least one among the level | step-difference parts which are formed in the direction which cross | intersects a direction and become a base point bent at the time of the external load input in a 2nd undulation state. In this case, it is suitable as a structure of the other side weak part. In addition, the front side edge part of the other side link member is a front side edge part in the other side link member in the standing state.

  Moreover, the position where the other end of the other side link member is connected to the vehicle floor side may be at a position offset in the width direction of the vehicle seat with respect to one end of the other side link member. In this case, for example, the other weak portion is set in the bent portion provided to offset the one end and the other end of the other link member in the width direction of the vehicle seat, and the other weak portion The stress at the time of external load input can be concentrated and the shock absorbing function can be promoted.

It is a perspective view which shows a sheet | seat. It is a perspective view which shows a cushion frame etc. FIG. 3 is a cross-sectional explanatory view taken along the line III-III in FIG. 1. It is a side view which shows an inner link. It is a perspective view which shows an outer rear link. It is a side view which shows the inner link part of a 1st state (downmost state). It is a side view which shows the outer link part of a 1st state (downmost state). It is a side view which shows the inner link part of a 2nd state (neutral state). It is a side view which shows the outer link part of a 2nd state (neutral state). It is a side view which shows an outer rear link.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
In the present embodiment, the vehicle seat of the present disclosure is applied to a vehicle seat used in an automobile or the like.

  In the present embodiment, the arrows indicating the up, down, front, back, left, and right directions attached to the drawings are described for easy understanding of the relationship between the drawings. The present disclosure is not limited to the directions given in the drawings.

  As shown in FIGS. 1 to 3, the seat (vehicle seat) 1 includes a seat body 10. The seat body 10 is provided on the upper portion of the back frame 3, the cushion frame 2 constituting the seat cushion skeleton serving as a seating portion of the occupant, the back frame 3 constituting the seat back skeleton serving as the backrest portion of the occupant, A headrest frame (not shown) constituting a skeleton of a headrest that supports the head of the occupant.

  The cushion frame 2 includes an inner side frame (frame member, one frame member) 21 disposed on the left side of the seat cushion, and an outer side frame (frame member, other frame member) disposed on the right side of the seat cushion. 22. The inner side frame 21 and the outer side frame 22 are arranged facing each other in the left-right direction. Each of the inner side frame 21 and the outer side frame 22 is formed to extend in the longitudinal direction in the front-rear direction. In the seat 1, the left-right direction is the width direction of the seat 1, the left side is the vehicle inner side, and the right side is the vehicle outer side.

  The cushion frame 2 includes a cylindrical front rod 23 disposed at the front portion of the seat cushion, and a cylindrical rear rod 24 disposed at the rear portion of the seat cushion. The front rod 23 is installed in the left-right direction between the front end portion of the inner side frame 21 and the front end portion of the outer side frame 22. The rear rod 24 is installed in the left-right direction between the rear end portion of the inner side frame 21 and the rear end portion of the outer side frame 22.

  The rear rod 24 includes a central rod portion 241, and a left rod portion 242 and a right rod portion 243 that are larger in diameter than the central rod portion 241. The left end portion of the central rod portion 241 is inserted into the left rod portion 242, and the right end portion of the central rod portion 241 is inserted into the right rod portion 243. The center rod portion 241, the left rod portion 242, and the right rod portion 243 are welded to each other.

  A front panel 25 is attached to the front end portion of the inner side frame 21 and the front end portion of the outer side frame 22. A pair of reclining plates 26 are attached to the rear end portion of the inner side frame 21 and the rear end portion of the outer side frame 22. The back frame 3 is attached to the reclining plate 26 via a recliner (not shown). The angle of the back frame 3 with respect to the cushion frame 2 can be adjusted by operating the recliner.

  A pair of left and right slide rails 4 a and 4 b are disposed on the lower side of the inner side frame 21 and the lower side of the outer side frame 22. Each of the slide rails 4a and 4b includes a lower rail 41 attached to a vehicle floor (vehicle floor surface) F and an upper rail 42 attached to the lower rail 41 so as to be slidable in the front-rear direction.

  An inner link portion (one side link portion) 5 is provided between the inner side frame 21 and the left slide rail 4a. The inner link part 5 is an inner front link (one side) which is two inner link members (one side link member) having one end connected to the inner side frame 21 side and the other end rotatably connected to the floor F side. It has a front link member 51 and an inner rear link (one side rear link member) 52. Here, one end of the inner link member may be directly connected to the inner side frame 21 or may be indirectly connected to the inner side frame 21 via another member. Moreover, the other end of the inner link member may be directly connected to the floor F, or may be indirectly connected to the floor F via another member.

  Specifically, the inner front link 51 has one end rotatably connected to the front end of the inner side frame 21, and the other end fixed to the front bracket 43 fixed to the front end of the upper rail 42 of the slide rail 4a. It is connected via a member 431 so as to be rotatable. One end of the inner rear link 52 is rotatably connected to the rear end portion of the inner side frame 21 via the left rod portion 242 of the rear rod 24, and the other end is fixed to the rear end portion of the upper rail 42 of the slide rail 4a. The rear bracket 44 is pivotally connected via a rotating shaft member 441.

  An outer link portion (other side link portion) 6 is provided between the outer side frame 22 and the right slide rail 4b. The outer link part 6 has an outer front link (the other side) which is two outer link members (the other side link member) having one end connected to the outer side frame 22 side and the other end rotatably connected to the floor F side. It has a front link member 61 and an outer rear link (the other side rear link member) 62. Here, one end of the outer link member may be directly connected to the outer side frame 22, or may be indirectly connected to the outer side frame 22 via another member. Moreover, the other end of the outer link member may be directly connected to the floor F, or may be indirectly connected to the floor F via another member.

  Specifically, one end of the outer front link 61 is rotatably connected to the front end portion of the outer side frame 22 via the front rod 23, and the other end is fixed to the front end portion of the upper rail 42 of the slide rail 4b. It is connected to the front bracket 45 through a rotary shaft member 451 so as to be rotatable. One end of the outer rear link 62 is rotatably connected to the rear end portion of the outer side frame 22 via the right rod portion 243 of the rear rod 24, and the other end is fixed to the rear end portion of the upper rail 42 of the slide rail 4b. Further, the rear bracket 46 is rotatably connected via a rotary shaft member 461.

  The position where the other end of the inner link 52 is connected to the floor F side, that is, the position where the other end of the inner link 52 is connected to the slide rail 4a via the rear bracket 44 is substantially the same as one end of the inner link 52. Located directly below.

  On the other hand, the position where the other end of the outer rear link 62 is connected to the floor F side, that is, the position where the other end of the outer rear link 62 is connected to the slide rail 4b via the rear bracket 46 is one end of the outer rear link 62. Is offset to the outside (right side) of the vehicle.

  The left rod portion 242 of the rear rod 24 is disposed so as to penetrate the inner side frame 21 and the inner rear link 52, and is welded to the inner side frame 21. A spacer 244 is disposed between the inner side frame 21 and the inner rear link 52 so as to cover the outer periphery of the left rod portion 242 of the rear rod 24.

  A substantially sector-shaped sector gear 27 is fixed to the right rod portion 243 of the rear rod 24. A plurality of teeth are provided on the arcuate end edge of the sector gear 27. The plurality of teeth of the sector gear 27 are configured to mesh with the plurality of teeth of a pinion gear (not shown) attached to the outer side frame 22. A guide member 28 that restricts movement of the sector gear 27 in the left-right direction is attached to the outer side frame 22. The guide member 28 is connected to the pinion gear. The pinion gear rotates by operating an operation lever 29 attached to the outer side frame 22 in the vertical direction.

  The right rod portion 243 of the rear rod 24 is disposed so as to penetrate the outer side frame 22, the outer rear link 62 and the sector gear 27, and is welded to the outer side frame 22. Spacers 245 and 246 are respectively arranged between the outer side frame 22 and the outer rear link 62 and between the outer side frame 22 and the sector gear 27 so as to cover the outer periphery of the right rod portion 243 of the rear rod 24.

  The inner side frame 21 and the outer side frame 22 are rotated around the other end of each of the inner front link 51, the inner rear link 52, the outer front link 61, and the outer rear link 62. When the link 52, the outer front link 61, and the outer rear link 62 are raised and lowered, the height position of the seat body 10 with respect to the floor F side can be adjusted.

  Specifically, by operating the operation lever 29 to rotate the pinion gear, the rear rod 24 is rotated via the sector gear 27, and the inner rear link 52 and the outer rear link 62 are respectively connected to the rotary shaft member 441 and the rotary shaft member. It rotates around 461. Further, the inner front link 51 and the outer front link 61 together with the inner rear link 52 and the outer rear link 62 rotate around the rotating shaft member 431 and the rotating shaft member 451, respectively. Thereby, the inner front link 51, the inner rear link 52, the outer front link 61, and the outer rear link 62 are raised and lowered, and the height positions of the inner side frame 21 and the outer side frame 22 with respect to the floor F can be adjusted.

  As shown in FIG. 4, the inner link 52 of the inner link portion 5 buckles when an external load is input (for example, when a load is input from the occupant to the seat 1 due to a rear collision of the vehicle). A possible deformation portion (one-side weak portion) 53 is provided. The deformable portion 53 is configured to be more fragile (with lower strength) than other portions of the inner link 52. The deformable portion 53 has a hole portion 531 provided at a rear edge portion of the inner rear link 52, specifically, a rear edge portion of the inner rear link 52 in a standing state.

  As shown in FIG. 5, the outer link 62 of the outer link portion 6 is provided with a stepped portion (the other weak portion) 63 that can buckle when an external load is input. The step portion 63 is configured to be weaker (low in strength) than other portions of the outer rear link 62. The step portion 63 is formed in a direction intersecting the extending direction connecting both ends of the outer rear link 62.

  The deformed portion 53 of the inner rear link 52 is configured to be more fragile than the stepped portion 63 of the outer rear link 62. The inner link 52 has a lower strength (for example, bending strength) than the outer rear link 62 and is configured to buckle more easily than the outer rear link 62 when an external load is input.

  As shown in FIGS. 6 and 7, the seat 1 having the above-described configuration includes first inner link members (inner front links 51 and inner rear links 52) and outer link members (outer front links 61 and outer rear links 62). The deformed portion 53 of the inner rear link 52 is configured to buckle preferentially over the stepped portion 63 of the outer rear link 62 when an external load is input in the undulating state. Here, the first undulation state is a downmost state in which the inner link portion 5 and the outer link portion 6 are most prone. Further, the fact that the deformed portion 53 buckles preferentially over the stepped portion 63 means that the deformed portion 53 buckles before the stepped portion 63 when an external load is input, and depends on the magnitude of the input external load. Only the deformable portion 53 may buckle, or the stepped portion 63 may buckle after the deformable portion 53 buckles.

  Specifically, in the first undulation state, the deformed portion 53 of the inner rear link 52 is positioned close to the rear bracket 44 disposed on the floor F side of the inner rear link 52. Therefore, when the external load is input in the first undulation state, the deformed portion 53 of the inner rear link 52 is deformed by coming into contact with the floor F side of the vehicle, that is, the rear bracket 44. Thereby, the deformation | transformation part 53 of the inner rear link 52 buckles, and the impact with respect to the sheet | seat 1 can be absorbed.

  As shown in FIGS. 8 and 9, the seat 1 configured as described above includes the second inner link member (the inner front link 51 and the inner rear link 52) and the outer link member (the outer front link 61 and the outer rear link 62). The stepped portion 63 of the outer rear link 62 is configured to buckle preferentially over the deformed portion 53 of the inner rear link 52 when an external load is input in the undulating state. Here, the second undulation state is a neutral state that stands up more than a state other than the first state, for example, the first undulation state (downmost state) of the inner link portion 5 and the outer link portion 6. Further, the stepped portion 63 buckling preferentially over the deformed portion 53 means that the stepped portion 63 buckles before the deformed portion 53 when an external load is input, and depends on the magnitude of the input external load. Only the stepped portion 63 may buckle, or the deformed portion 53 may buckle after the stepped portion 63 buckles.

  Specifically, in the second undulation state, the outer rear link 62 is erected more than the first undulation state. Therefore, when the external load is input in the second undulation state, the outer rear link 62 bends with the stepped portion 63 of the outer rear link 62 as a base point. That is, the stepped portion 63 of the outer rear link 62 serves as a base point for bending the outer rear link 62. Thereby, the step part 63 of the outer rear link 62 is buckled, and the impact on the seat 1 can be absorbed.

Next, the effect in the sheet | seat 1 of this embodiment is demonstrated.
According to the seat 1 of this embodiment, the deformed portion 53 of the inner rear link 52 buckles preferentially over the stepped portion 63 of the outer rear link 62 when an external load is input in the first undulating state (downmost state). The stepped portion 63 of the outer rear link 62 can be buckled preferentially over the deformed portion 53 of the inner rear link 52 when an external load is input in the second undulating state (neutral state).

  That is, there is a portion that preferentially buckles when an external load is input, depending on the undulation state of the inner link member (inner front link 51, inner rear link 52) and outer link member (outer front link 61, outer rear link 62). Different. Therefore, it is possible to effectively exhibit an impact absorbing function that matches the height position of the seat body 10 when an external load is input.

  In the seat 1, the first undulation state is a down-most state in which the inner link member (the inner front link 51, the inner rear link 52) and the outer link member (the outer front link 61, the outer rear link 62) are most inclined. is there. For this reason, the deformed portion 53 of the inner rear link 52 is more than the stepped portion 63 of the outer rear link 62 when an external load is input in a down-most state where the inner link portion 5 and the outer link portion 6 are closest to the floor F side. Can also be preferentially buckled. As a result, the shock absorbing function can be reliably exhibited even in the down-most state.

  Further, the inner link part 5 has an inner front link 51 and an inner rear link 52, the outer link part 6 has an outer front link 61 and an outer rear link 62, and the deforming part 53 has an inner rear link. The stepped portion 63 is provided in the outer rear link 62. Therefore, the deformed portion 53 and the stepped portion 63 that are weak portions (low strength portions) are provided on the inner rear link 52 and the outer rear link 62 that are disposed on the rear side of the seat 1 that is likely to receive an input load from the outside. Thus, the shock absorbing function can be more effectively exhibited when an external load is input.

  The deformed portion 53 of the inner link 52 has a hole 531 provided at the rear edge of the inner link 52, and the floor F side (specifically, when an external load is input in the first undulation state). The rear bracket 44 is in contact with the rear bracket 44) to be deformed. Therefore, it is suitable as a structure of the weak part (one side weak part) of the inner link part 5. FIG.

  Further, the stepped portion 63 of the outer rear link 62 is formed in a direction intersecting with the extending direction connecting both ends of the outer rear link 62 so as to be a base point that is bent when an external load is input in the second undulation state. It is configured. Therefore, it is suitable as a structure of the weak part (other side weak part) of the outer link part 6.

  Further, the position where the other end of the outer rear link 62 is connected to the floor F side, that is, the position where the other end of the outer rear link 62 is connected to the slide rail 4b via the rear bracket 46 is one end of the outer rear link 62. Is offset to the outside (right side) of the vehicle. Therefore, the step part 63 is set at a part where the outer rear link 62 is offset to the vehicle outer side (right side), and stress at the time of external load input can be concentrated on the step part 63 to promote the shock absorbing function.

(Other embodiments)
Needless to say, the present disclosure is not limited to the above-described embodiment, and can be implemented in various forms without departing from the present disclosure.

  (1) In the above embodiment, the “vehicle seat” of the present disclosure is applied to a vehicle seat (seat 1) that constitutes a driver seat of an automobile. For example, other seats in the vehicle other than the driver seat are configured. You may apply to the vehicle seat to do.

  (2) In the above-described embodiment, the “vehicle seat” of the present disclosure is applied to a vehicle seat (seat 1) used in an automobile, but for example, applied to a vehicle seat used in a railway other than an automobile. Alternatively, the present invention may be applied to a sheet used for other vehicles such as an aircraft and a ship.

  (3) In the above embodiment, the “one frame member” of the present disclosure is the inner side frame 21, and the “other frame member” of the present disclosure is the outer side frame 22. ”May be the outer side frame 22, and“ the other frame member ”may be the inner side frame 21. Further, the “one side link portion” of the present disclosure is the inner link portion 5, and the “other side link portion” of the present disclosure is the outer link portion 6. For example, the “one side link portion” is the outer link portion 6. The “other side link portion” may be the inner link portion 5. In addition, the “one side link member” of the present disclosure is the inner front link 51 and the inner rear link 52, and the “other side link portion” of the present disclosure is the outer front link 61 and the outer rear link 62. The “one side link member” may be the outer front link 61 and the outer rear link 62, and the “other side link member” may be the inner front link 51 and the inner rear link 52.

  (4) In the above embodiment, the “first undulation state” of the present disclosure is the down-most state, and the “second undulation state” is the neutral state, but the first undulation state and the second undulation state May be in states other than those described above.

  (5) In the above embodiment, the “one side link member” of the present disclosure is the two of the inner front link 51 and the inner rear link 52. For example, the number of the one side link member may be one, There may be three or more. Moreover, although the “other side link member” of the present disclosure is the two of the outer front link 61 and the outer rear link 62, for example, the number of the other side link member may be one, or three or more. Also good.

  (6) In the above embodiment, the “one-side vulnerable portion” of the present disclosure is the deformed portion 53 of the inner link 52, but the configuration of the one-side vulnerable portion is not limited to this, and may be other configurations. There may be.

  (7) In the above embodiment, the “other-side weakened portion” of the present disclosure is the stepped portion 63 of the outer rear link 62, but the configuration of the other-side weakened portion is not limited to this, and other configurations are possible. There may be. For example, as shown in FIG. 10, the other weak portion is provided at the front edge of the outer rear link 62, specifically, the front edge of the outer rear link 62 in the upright state, and is in the second undulating state. It may be a notch 64 serving as a base point bent when an external load is input. Moreover, you may provide both the level | step-difference part 63 and the notch part 64. FIG.

  (8) In the above embodiment, the deformed portion 53 that is the “one-side fragile portion” of the present disclosure is provided on the inner rear link 52, but may also be provided on the inner front link 51. Moreover, although the step part 63 which is the “other side weak part” of the present disclosure is provided in the outer rear link 62, it may be configured to be provided also in the outer front link 61.

  (9) In the above embodiment, the position where the other end of the outer rear link 62 is connected to the floor F side, that is, the position where the other end of the outer rear link 62 is connected to the slide rail 4b via the rear bracket 46 is Although it is in a position offset to the vehicle outer side (right side) with respect to one end of the outer rear link 62, for example, like the other end of the inner rear link 52, it is a position almost directly below one end of the outer rear link 62. Also good.

  (10) The functions of one component in the above embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified from the wording described in the claims are embodiments of the present disclosure.

  DESCRIPTION OF SYMBOLS 1 ... Seat (vehicle seat), 10 ... Seat main body, 21 ... Inner frame (frame member, one frame member), 22 ... Outer frame (frame member, other frame member), 5 ... Inner link part (one side) Link part) 51 ... Inner front link (one side link member, one side front link member), 52 ... Inner rear link (one side link member, one side rear link member), 53 ... Deformation part (one side weak part), 6 ... outer link part (other side link part), 61 ... outer front link (other side link member, other side front link member), 62 ... outer rear link (other side link member, other side rear link member), 63 ... Step part (other side weak part), 64 ... Notch part (other side weak part), F ... Floor (vehicle floor)

Claims (6)

A vehicle seat,
Constituting a skeleton of a seat body on which an occupant is seated, and a pair of frame members disposed to face each other in the width direction of the vehicle seat;
One side link part having at least one one side link member, one end connected to one frame member side of the pair of frame members and the other end rotatably connected to the vehicle floor surface side,
The other side link portion having at least one other side link member, one end of which is connected to the other frame member side of the pair of frame members and the other end of which is rotatably connected to the vehicle floor surface side; With
The one frame member and the other frame member are rotated around the other end of the one side link member and the other end of the other side link member to rotate the one side link member and the other side link member. Is configured so that the height position of the seat body with respect to the vehicle floor side can be adjusted,
The one side link member of the one side link part is provided with a one side weak part capable of buckling when an external load is input,
The other side link member of the other side link part is provided with the other side weak part capable of buckling when an external load is input,
The one side weak part is configured to be weaker than the other side weak part,
At the time of external load input in the first undulation state of the one side link member and the other side link member, the one side weak part is configured to buckle preferentially over the other side weak part,
When the external load is input in the second undulation state in which the one side link member and the other side link member are erected from the first undulation state, the other side weak part is preferentially seated over the one side weak part. A vehicle seat configured to bend.   2. The vehicle seat according to claim 1, wherein the first undulation state is a downmost state in which the one side link member and the other side link member are most lying down.   The one-side link portion includes a one-side front link member and a one-side rear link member that are the one-side link members connected to the front and rear sides of the seat body on the one frame member side. The other side link portion has the other side front link member and the other side rear link member, which are the other side link members connected to the front side and the rear side of the seat body on the other frame member side in the front-rear direction. The vehicle according to claim 1, wherein the one-side rear link member is provided with the one-side fragile portion, and the other-side rear link member is provided with the other-side fragile portion. Sheet.   The one-side fragile portion has a hole provided in a rear edge portion of the one-side link member, and deforms in contact with the vehicle floor surface side when an external load is input in the first undulation state. The vehicle seat according to any one of claims 1 to 3, comprising a portion.   The other fragile portion is provided at a front edge of the other side link member, and connects the both ends of the cutout portion serving as a base point that is bent when an external load is input in the second undulation state, and the other side link member. 5. The structure according to claim 1, comprising at least one of stepped portions formed in a direction intersecting with the extending direction and serving as a base point bent when an external load is input in the second undulation state. The vehicle seat according to any one of claims.   The position where the other end of the other side link member is connected to the vehicle floor surface side is a position offset in the width direction of the vehicle seat with respect to the one end of the other side link member. 5. The vehicle seat according to 5.