JP6035354B2 - Vehicle seat support structure - Google Patents

Description

  The present invention relates to a vehicle seat support structure.

Most vehicle seats are rigidly supported on the vehicle floor. Although vibrations in various frequency ranges occur in vehicles, if vibrations such as engine idling vibrations and running vibrations close to the natural frequency of the vehicle seat are input to the floor of the vehicle body, the seats are likely to vibrate. .
For this reason, as a support structure for a vehicle seat that copes with this, a structure in which a vibration absorber including a rubber-like elastic member is interposed between a floor portion in a vehicle interior and a seat body has been devised (for example, Patent Document 1).

In the seat support structure described in Patent Document 1, a seat body side member is attached to a movable rail side member that is slidably supported by a fixed rail in a vehicle compartment via a vibration absorber. In the vibration absorber, a columnar rubber-like elastic member is attached between the inner cylinder and the outer cylinder, the outer cylinder is fitted and fixed in the mounting hole of the seat body side member, and the inner cylinder is fastened to the movable rail side member. It is fixed by bolts and nuts which are members.
In the inner cylinder, the shaft portion of the bolt is inserted from the end surface on the other end side in the axial direction in a state where the end surface on one side in the axial direction is in contact with the movable rail side member. A nut is fastened to the shaft portion of the bolt that penetrates the movable rail side member. At this time, the flange portion provided on the head side of the bolt contacts the end surface on the other end side in the axial direction of the inner cylinder and the end portion on the other end side in the axial direction of the rubber-like elastic member, and the axial direction of the inner cylinder The one end face of the rubber-like elastic member and the end portion on the one end side in the axial direction of the rubber-like elastic member are in contact with the movable rail side member.

  In the case of the seat support structure described in Patent Document 1, when the movable rail side member vibrates in response to vehicle vibration, the rubber-like elastic member interposed between the inner cylinder and the outer cylinder of the vibration absorber becomes input vibration. Accordingly, it is elastically deformed, thereby absorbing the vibration transmitted to the seat body side. Further, each end in the axial direction of the rubber-like elastic member of the vibration absorber is in contact with the end surface of the movable rail side member and the flange portion on the head side of the bolt, and the vertical movement of the seat body side member ( The impact load in the vertical direction) can be elastically absorbed.

International Publication No. 2014/007011

  However, in the conventional seat support structure described above, since the end portions on both sides in the axial direction of the rubber-like elastic member are in contact with the end surface of the movable rail side member and the flange portion of the bolt head, It is difficult to sufficiently reduce the spring constant of the member in the axial direction. For this reason, it is desired to set the spring constant in the axial direction of the rubber-like elastic member to be smaller and to improve the vibration absorption performance of the seat.

  Accordingly, the present invention is intended to provide a vehicle seat support structure that can further improve the vibration absorption performance of the seat.

In order to solve the above-described problems, the vehicle seat support structure according to the present invention is a fixed rail (for example, the fixed rail of the embodiment) that is fixedly installed on a floor portion (for example, the floor portion 3 of the embodiment) in the vehicle interior. 15), a movable rail side member (for example, the lower frame block 13L of the embodiment) that is slidably held by the fixed rail, and a seat body side member (for example, the upper portion of the embodiment) attached to the movable rail side member A vehicle seat support structure including a frame block 13U) and a vibration absorber (for example, the vibration isolation block 14 of the embodiment) interposed between the movable rail side member and the seat main body side member. The vibration absorber is a first member (for example, the upper frame block of the embodiment) which is one of the movable rail side member and the seat body side member. The inner cylinder (for example, the inner cylinder 24 of the embodiment, the displacement regulating flange 30) and the outer peripheral portion of the movable rail side member and the seat main body side member. A rubber-like elastic member (for example, the rubber shape of the embodiment) that is attached to the second member (for example, the lower frame block 13L of the embodiment) that is the other member and whose inner peripheral portion is fixed to the inner cylinder. A fastening member (for example, the bolt 27 and weld nut of the embodiment) that penetrates through the inner cylinder and attaches the inner cylinder to the main body of the first member. 29, a displacement regulating flange 30), and the fastening member abuts on the end surface of the inner cylinder opposite to the main body portion of the first member, and is separated from the movable rail side member of the seat main body side member. direction Flange adjacent to the movable rail side member according to the displacement (e.g., the displacement restriction flange 30 of the embodiment) has an end portion in the axial direction on both sides of the rubber-like elastic member, said first member The main body portion and the flange portion face each other with an axial gap that can be contacted (for example, the gaps d1 and d2 in the embodiment) , and the end portions on both sides in the axial direction of the rubber-like elastic member are the rubber. A protrusion projecting outward in the axial direction with respect to the other part of the axial end surface of the elastic member (for example, the protrusions 31 and 31A of the embodiment), and abutting against the flange portion of the rubber elastic member The projecting portion that is in contact is disposed radially outside the projecting portion that is in contact with the main body portion of the first member of the rubber-like elastic member, and is in contact with the main body portion of the first member. It is formed with a larger volume than the protrusion. I did it.

As a result, when the movable rail side member vibrates in response to vehicle vibration, the rubber-like elastic member interposed between the inner cylinder and the second member is elastically deformed, and the vibration transmitted to the seat body side member is absorbed. Is done. At this time, the rubber elastic member absorbs vibration by receiving a shear load mainly along the axial direction, but the end portions on both sides in the axial direction of the rubber-like elastic member are spaced from the first member. Therefore, the spring constant in the axial direction of the rubber-like elastic member is sufficiently small. For this reason, the vibration of the sheet can be sufficiently absorbed. Further, when the seat main body side member is to be largely displaced with respect to the movable frame side member by the input of an impact, the end portion in the axial direction of the rubber-like elastic member comes into contact with the first member. At this time, the end portion of the rubber-like elastic member is elastically deformed in the axial direction, and excessive relative displacement between the first member and the second member is restricted while absorbing the load.
In addition, when an impact is input, the axial end of the rubber-like elastic member opposite to the main body of the first member abuts on the flange portion, so that the first member and the second member are excessively relative to each other. Displacement is regulated elastically.
In addition, when an impact is input, the protrusion provided at the end in the axial direction of the rubber-like elastic member comes into contact with the first member, so that the contact of the end in the axial direction of the rubber-like elastic member with respect to the first member The area becomes smaller. For this reason, the impact when the axial end of the rubber-like elastic member comes into contact with the first member is alleviated.

The surface of the first member against which the end surface of the inner cylinder is abutted (for example, the lower surface 13U-a and the upper surface 30a of the embodiment) is continuous with the surface where the axial end of the rubber-like elastic member faces. It may be a flat surface, and the axial end of the rubber-like elastic member may be disposed at a position recessed in the axial direction with respect to the end surface of the inner cylinder.
In this case, at the time of normal vehicle vibration input, the end portion in the axial direction of the rubber-like elastic member is in a non-contact state with respect to the plane of the first member facing, so that the spring constant of the rubber-like elastic member is sufficient. The vibration of the sheet is sufficiently absorbed. On the other hand, when an impact is input, the end portion in the axial direction of the rubber-like elastic member arranged at a position recessed in the axial direction with respect to the end surface of the inner cylinder comes into contact with the plane of the first member, thereby An excessive relative displacement between the first member and the second member is elastically restricted.

The vibration absorber includes an outer cylinder (for example, the outer cylinder 23 of the embodiment) that holds the outer peripheral portion of the rubber-like elastic member and is fixed to the second member. The rubber-like elastic member may be provided so as to support an inner region in the axial direction with respect to the protruding portion that can contact the first member .
In this case, since the axially inner region of the protrusion of the rubber-like elastic member is supported by a part of the outer cylinder, the rubber when the protrusion of the rubber-like elastic member comes into contact with the first member when an impact is input It is possible to achieve stable deformation in the axial direction of the elastic member and reliable regulation of the relative displacement between the first member and the second member.

According to this invention, the end portions on both sides in the axial direction of the rubber-like elastic member are opposed to each other with an axial gap that can come into contact with the first member. In addition, vibration can be sufficiently absorbed by the small spring constant of the rubber-like elastic member, and when the impact is input, the axial end of the rubber-like elastic member abuts on the first member, so that the first member An excessive relative displacement between the member and the second member can be elastically restricted. Therefore, according to the present invention, the vibration absorption performance of the seat can be further enhanced.

It is a perspective view which shows the vehicle interior of the vehicle which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view of the sheet | seat support part which concerns on one Embodiment of this invention. It is an enlarged view of the III part of FIG. 2 of the sheet | seat support part which concerns on one Embodiment of this invention. 1 is a perspective view of a vibration absorber (anti-vibration block) according to an embodiment of the present invention. 1 is a perspective view of a vibration absorber (anti-vibration block) according to an embodiment of the present invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the arrow FR indicates the front of the vehicle 1, the arrow UP indicates the upper side of the vehicle 1, and the arrow LH indicates the left side of the vehicle 1. In the following description, unless otherwise specified, front, rear, upper, lower, left, and right mean front, rear, upper, lower, left, and right with respect to the vehicle 1. To do.

FIG. 1 is a view showing a vehicle seat 10 (hereinafter referred to as “seat 10”) installed in the passenger compartment 1a and a support portion thereof.
The vehicle 1 according to this embodiment is a minivan type vehicle including a plurality of rows of seats in the front-rear direction on the floor portion 3 in the passenger compartment 1a. FIG. 1 shows only the second row of sheets 10. The second row of seats 10 is installed on the floor portion 3 with a predetermined distance between the right and left sides in the vehicle width direction. A passage 50 through which an occupant can pass is provided between the ends of the pair of seats 10 on the floor portion 3 on the inner side in the vehicle width direction.
The pair of seats 10 and 10 are formed symmetrically with respect to the left and right of the vehicle body, but the basic structure is the same. Therefore, in the following, the right sheet 10 and its support structure will be described in detail, and detailed description of the left sheet 10 and its support structure will be omitted.

FIG. 2 is a view showing a longitudinal section of the sheet 10 and its supporting portion.
The seat 10 is connected to a rear end portion of a seat cushion 11 that supports the occupant's buttocks and thighs so that a seat back 12 that supports the occupant's waist and back can be tilted. The seat cushion 11 has a pair of left and right side frame portions 13 and 13 extending along the longitudinal direction of the vehicle body.

The side frame portion 13 includes an upper frame block 13U that supports a seat pan (not shown) and a seat back 12, and a lower frame block 13L that is positioned below the upper frame block 13U. The frame block 13L is connected to each other via a pair of front and rear anti-vibration blocks 14, 14 (vibration absorber).
In this embodiment, the upper frame block 13U of the seat 10 and the members positioned above the upper frame block 13U constitute the seat body 10-a. The upper frame block 13U constitutes a seat body side member, and the lower frame block 13L constitutes a movable rail side member.

  A pair of fixed rails 15 and 15 are fixedly installed on the floor 3 in the passenger compartment 1a along the longitudinal direction of the vehicle body. The fixed rail 15 is formed with a guide groove 16 that opens upward along the longitudinal direction of the vehicle body, and the movable rail 17 is slidable in the longitudinal direction of the vehicle body and is prevented from coming off vertically. Is retained.

  The movable rail 17 is disposed inside the corresponding fixed rail 15 and is slidably engaged with the inside of the fixed rail 15, and above the fixed rail 15 through the guide groove 16 from the rail main body 17 a. And a pedestal portion 17b that protrudes toward the center. Although not described in detail here, a slide lock (not shown) for locking the front / rear operation position of the seat 10 (seat body 10-a) is provided between the rail body portion 17a and the corresponding fixed rail 15. A mechanism is provided.

  The lower ends of the left and right side frame portions 13 of the seat main body 10-a are fastened and fixed to the upper portion of the pedestal portion 17 b of each movable rail 17. Specifically, the lower frame block 13L of the corresponding side frame portion 13 is overlaid on the pedestal portion 17b of each movable rail 17, and the front and rear of each lower frame block 13L are bolts 18 with respect to the movable rail 17. It is concluded by

FIG. 3 is an enlarged view of a portion III in FIG. 2, and FIGS. 4 and 5 are perspective views of the vibration isolation block 14. 4 is a perspective view of the anti-vibration block 14 as viewed from above, and FIG. 5 is a perspective view of the anti-vibration block 14 as viewed from below.
As shown in FIG. 3, the anti-vibration block 14 includes a metal outer cylinder 23 fitted and fixed in the mounting hole 26 on the upper wall of the lower frame block 13L, and a metal fixed to the lower wall of the upper frame block 13U. And an annular rubber elastic member 25 having an outer peripheral portion vulcanized and bonded to the outer tube 23 and an inner peripheral portion vulcanized and bonded to the inner tube 24.

The inner cylinder 24 is inserted into the shaft portion 27a of the bolt 27 from below, and is fastened and fixed to the lower wall of the upper frame block 13U by the bolt 27. More specifically, a mounting hole 28 through which the shaft portion 27a of the bolt 27 is inserted and a weld nut 29 into which the shaft portion 27a of the bolt 27 is screwed are provided on the lower wall of the upper frame block 13U. The tip of the shaft portion 27 a of the bolt 27 inserted into the inner cylinder 24 from the lower side passes through the attachment hole 28 and is fastened to the weld nut 29. Further, a disc-shaped displacement restriction flange 30 (flange part) is preliminarily fitted on the shaft part 27a of the bolt 27, and when the inner cylinder 24 is attached to the lower wall of the upper frame block 13U by the bolt 27, the displacement restriction is performed. The flange 30 is sandwiched between the head portion 27 b of the bolt 27 and the end surface of the inner cylinder 24. Therefore, when the bolt 27 is tightened, one end surface in the axial direction of the inner cylinder 24 comes into contact with the lower surface 13U-a of the upper frame block 13U, and the other end surface in the axial direction of the inner cylinder 24 is the upper surface of the displacement regulating flange 30. It abuts on 30a.
In this embodiment, the bolt 27, the weld nut 29, and the displacement restricting flange 30 constitute a fastening member. The displacement regulating flange 30 may be formed integrally with the head portion 27b of the bolt 27. In this embodiment, the upper frame block 13U and a member that is displaced integrally with the upper frame block 13U constitute a first member, and the lower frame block 13L and the lower frame block 13L are displaced integrally. The member constitutes a second member.

At one end of the rubber-like elastic member 25 in the axial direction (the end on the upper side when the anti-vibration block 14 is installed), four protrusions 31 having a substantially rectangular shape in front view are circumferential. They are provided at regular intervals in the direction. The protrusion 31 protrudes outward in the axial direction with respect to the other portion 25 a in the axial end surface of the rubber-like elastic member 25, and is recessed in the axial direction with respect to the axial end surface on the same side of the inner cylinder 24. Placed in position. Therefore, in a state where the inner cylinder 24 is attached to the upper frame block 13U with the bolts 27, the projecting portion 31 faces the lower surface 13U-a of the upper frame block 13U with an axial gap d1 that can contact. .
However, the protrusion 31 may be set so as to slightly contact the lower surface 13U-a of the upper frame block 13U by the weight of the seat body 10-a in a state where the seat 10 is installed on the floor portion 3.

  In addition, the other end portion in the axial direction of the rubber-like elastic member 25 (the end portion on the lower side when the anti-vibration block 14 is installed) has four protrusions 31A that are substantially rectangular in front view. Are provided at equal intervals in the circumferential direction. The protrusion 31A protrudes outward in the axial direction with respect to the other part 25b in the axial end surface of the rubber-like elastic member 25, and is recessed in the axial direction with respect to the axial end surface on the same side of the inner cylinder 24. Placed in position. The protrusion 31 </ b> A is disposed so as to face the upper surface 30 a of the displacement regulating flange 30. Therefore, in a state where the inner cylinder 24 is attached to the upper frame block 13U by the bolt 27, the protrusion 31A faces the upper surface 30a of the displacement regulating flange 30 with an axial gap d2 that can be contacted.

The outer cylinder 23 has an annular inward flange 23a extending on one end side in the axial direction, and an annular outward flange 23b extending on the other end side in the axial direction. The inward flange 23 a is embedded near one end in the axial direction of the rubber-like elastic member 25, and supports an inner region in the axial direction from the protrusion 31 of the rubber-like elastic member 25. The outward flange 23b is disposed near the other end in the axial direction of the rubber-like elastic member 25, and is vulcanized and bonded to the back side of the protrusion 31A of the rubber-like elastic member 25. The outward flange 23b supports an inner region in the axial direction from the protrusion 31A of the rubber-like elastic member 25.
The protrusion 31A on the other end side in the axial direction of the rubber-like elastic member 25 is disposed radially outside the protrusion 31 on one end side in the axial direction of the rubber-like elastic member 25, and on the one end side in the axial direction. It has a larger volume than the protrusion 31. However, the protrusion 31 on one end side in the axial direction and the protrusion 31A on the other end side are arranged at substantially the same position in the circumferential direction.

  The rubber-like elastic member 25 is interposed between the upper frame block 13U and the lower frame block 13L, and reduces vibration in a predetermined frequency range input to the floor portion 3 in the passenger compartment 1a. In the case of this embodiment, among idling vibrations input to the floor portion 3, engine idling vibration (vibration in the vibration frequency region of 20 to 25 Hz), running vibration (vibration in the vibration frequency region of 15 to 20 Hz), etc. As a result, the vibration absorption characteristics of the rubber-like elastic member 25 are tuned.

  In the vehicle employing the seat support structure according to this embodiment, when vibrations such as engine vibration and running vibration are input to the lower frame block 13L of the seat 10 via the movable rail 17, the lower frame block 13L and the upper frame block The rubber-like elastic member 25 of the anti-vibration block 14 interposed between 13U is elastically deformed according to the input vibration and absorbs vibration transmitted to the upper frame block 13U side.

  At this time, the rubber-like elastic member 25 receives a vibration component in the vertical direction and undergoes shear deformation mainly along the axial direction. However, in the seat support structure according to this embodiment, the end of the rubber-like elastic member 25 in the axial direction. Since the portions (projections 31, 31A) are opposed to the upper frame block 13U and the displacement regulating flange 30 with axial gaps d1, d2, the spring constant in the axial direction of the rubber-like elastic member 25 is sufficient. It is getting smaller. Even when one end (projection 31) in the axial direction of the rubber-like elastic member 25 is set to slightly contact the lower surface 13U-a of the upper frame block 13U when the seat 10 is installed, the rubber-like elastic member 25 is rubbery. Since the other end (projection 31A) in the axial direction of the elastic member 25 faces the upper surface 30a of the displacement regulating flange 30 with an axial gap, the spring in the axial direction of the rubber-like elastic member 25 The constant is small enough. Therefore, normal vehicle vibration can be sufficiently absorbed by the rubber-like elastic member 25.

  Further, when a large impact is input to the vehicle 1 such as riding on a protrusion on the road surface during traveling, if the seat body 10-a is about to be displaced greatly up and down with respect to the lower frame block 13L, rubber-like elasticity The protrusions 31 and 31A of the member 25 abut against the lower surface 13U-a of the upper frame block 13U and the upper surface 30a of the displacement restricting flange 30, and at this time, excessive displacement in the vertical direction of the seat body 10-a is elastically restricted. Is done.

  Further, in the seat support structure according to this embodiment, the lower surface 13U-a of the upper frame block 13U against which the end surfaces of the inner cylinder 24 in the axial direction are abutted and the upper surface 30a of the displacement regulating flange 30 are rubber-like elastic. The protrusions 31, 31 </ b> A of the member 25 are flat surfaces that are contiguous with the opposing surface, and the protrusions 31, 31 </ b> A of the rubber-like elastic member 25 are disposed at positions that are recessed in the axial direction with respect to the end surface of the inner cylinder 24. Yes. For this reason, unlike the case where the upper frame block 13U and the displacement restricting flange 30 are bent and deformed, and the protrusions 31 and 31A of the rubber-like elastic member 25 are separated from the facing surfaces, the above-described structure can be easily manufactured. An effect can be obtained.

  Further, it is not always necessary to provide the protrusions 31 and 31A at the axial end of the rubber-like elastic member 25. However, as in the seat support structure according to this embodiment, the axial direction of the rubber-like elastic member 25 is not limited. When the protrusions 31 and 31A are provided at the end portions and separated from the surface where the protrusions 31 and 31A face each other with a predetermined gap d1 and d2, the contact area with the facing surface when an impact is input is Can be small. For this reason, it is possible to mitigate the impact when the axial end of the rubber-like elastic member 25 abuts against the opposing surface when the impact is input.

  Further, in the seat support portion structure according to this embodiment, a displacement regulating flange 30 that abuts the end surface of the inner cylinder 24 opposite to the upper frame block 13U when the inner cylinder 24 is fastened and fixed is provided, and a rubber-like elastic member The 25 protrusions 31 </ b> A are opposed to the upper surface 30 a of the displacement restricting flange 30 with an axial gap d <b> 2 that can come into contact therewith. For this reason, when the impact is input, the upper surface 30a of the displacement regulating flange 30 abuts against the protrusion 31A of the rubber-like elastic member 25, thereby elastically regulating the displacement of the sheet body 10-a that is about to jump upward. be able to.

In the seat support structure according to this embodiment, the outer cylinder 23 that holds the outer peripheral portion of the rubber-like elastic member 25 is provided, and the inward flange 23a and the outward flange 23b of the outer cylinder 23 are projected portions 31 and 31A. The rubber-like elastic member 25 is vulcanized and bonded so as to support the inner region in the axial direction. Therefore, when the impact is input, when the lower surface 13U-a of the upper frame block 13U and the upper surface 30a of the displacement regulating flange 30 abut against the protrusions 31 and 31A, the protrusions 31 and 31A are stably deformed in the axial direction. In addition, the relative displacement of the upper frame block 13U and the displacement regulating flange 30 with respect to the lower frame block 13L can be reliably regulated.

In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary. For example, in the above embodiment, the outer peripheral portion of the rubber-like elastic member 25 is fixed to the movable rail side member (lower frame block 13L), and the inner side of the rubber-like elastic member 25 is fixed to the seat body side member (upper frame block 13U). The inner cylinder 24 of the rubber-like elastic member 25 is fixed to the seat body side member, and the inner cylinder 24 inside the rubber-like elastic member 25 is fixed to the movable rail side member. Also good. Further, the installation site of the vibration absorber (anti-vibration block 14) is not limited to between the upper frame block 13U and the lower frame block 13L, and for example, is interposed between the lower frame block 13L and the movable rail 17. Also good.
In the above embodiment, the second row seat of the vehicle has been described as an example, but the seat to which the support structure is applied may be a third row seat or a first row seat.

DESCRIPTION OF SYMBOLS 3 ... Floor part 10 ... Seat 10-a ... Seat main body 13U ... Upper frame block (Seat main body side member, 1st member)
13L ... Lower frame block (movable rail side member, second member)
14 ... Anti-vibration block (vibration absorber)
DESCRIPTION OF SYMBOLS 15 ... Fixed rail 17 ... Movable rail 23 ... Outer cylinder 24 ... Inner cylinder 25 ... Rubber-like elastic member 27 ... Bolt (fastening member)
29 ... Weld nut (fastening member)
30 ... Displacement restriction flange (flange, fastening member, first member)
31, 31A ... Projection d1, d2 ... Gap

Claims (3)

A fixed rail that is fixedly installed on the floor of the vehicle interior;
A movable rail side member slidably held on the fixed rail;
A sheet body side member attached to the movable rail side member;
A vehicle seat support structure comprising: a vibration absorber interposed between the movable rail side member and the seat body side member;
The vibration absorber is
An inner cylinder that is attached to the first member that is one of the movable rail side member and the seat body side member by abutting the end face in the axial direction;
A rubber-like elastic member whose outer peripheral portion is attached to a second member which is the other member of the movable rail side member and the seat main body side member, and whose inner peripheral portion is fixed to the inner cylinder; Prepared,
The first member includes a fastening member that penetrates the inner cylinder and attaches the inner cylinder to the main body of the first member;
The fastening member is in contact with the end surface of the inner cylinder opposite to the main body portion of the first member, and the movable rail side according to a displacement of the seat main body side member in a direction away from the movable rail side member. Having a flange portion close to the member,
Ends on both sides in the axial direction of the rubber-like elastic member face each other with an axial gap that can come into contact with the main body portion and the flange portion of the first member ,
The end portions on both sides in the axial direction of the rubber-like elastic member are constituted by protrusions protruding outward in the axial direction with respect to other portions of the end surface in the axial direction of the rubber-like elastic member,
The protrusion that contacts the flange portion of the rubber-like elastic member is disposed radially outside the protrusion that contacts the main body portion of the first member of the rubber-like elastic member, and A seat support structure for a vehicle, wherein the structure is formed to have a larger volume than the protrusion that contacts the main body of the first member .   The surface of the first member against which the end surface of the inner cylinder is abutted is a flat surface that is continuous with the surface facing the end of the rubber-like elastic member in the axial direction, and the end of the rubber-like elastic member in the axial direction. The vehicle seat support structure according to claim 1, wherein the portion is disposed at a position recessed in an axial direction with respect to an end surface of the inner cylinder. The vibration absorber has an outer cylinder that holds an outer peripheral portion of the rubber-like elastic member and is fixed to the second member;
The outer cylinder, according to claim 1, characterized in that is provided so as to support the axially inner region than the contact possible the projection relative to the first member of the rubber-like elastic member or seat support structure for a vehicle according to 2.

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