JP6096038B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat.

  In the vehicle seat described in Patent Document 1, a cushion shell is provided above the cushion frame. The cushion shell is configured to be movable in the vertical direction with respect to the vehicle body, and is elastically supported by a cushion support pad. When the occupant sits on the cushion shell, the cushion support pad is elastically deformed, so that an elastic force acts on the cushion shell from the cushion support pad, and vibrations input from the vehicle body to the cushion shell are cushion support. Absorbed by the pad.

Special table 2008-526425

By the way, depending on the shape of the cushion support pad and the shape of the portion of the cushion shell and the cushion frame that contact the cushion support pad, the compression rate of the cushion support pad when the occupant is seated differs for each part (as a whole) May not be uniform). In this case, the spring constant of the cushion support pad is different for each part, and the part having a high compression ratio has a high spring constant, so there is still room for improvement in ride comfort performance.
In the above-mentioned Patent Document 1, there is no disclosure about the shape of the cushion support pad and the shapes of the portions of the cushion shell and the cushion frame that contact the cushion support pad.

  An object of the present invention is to provide a vehicle seat with improved riding comfort performance in consideration of the above facts.

A vehicle seat according to claim 1 is held by a cushion pan connected to a vehicle body, a pad placed on the cushion pan, a holding member elastically supported by the pad, and the holding member. A holding surface formed on the upper surface of the pad and the bottom of the holding member, wherein the mounting surface formed on the upper surface of the cushion pan and the lower surface of the pad are in close contact with each other And the distance between the mounting surface and the holding surface is constant over the entire surface .

In the vehicle seat according to claim 1, since the cushion shell is elastically supported by the pad placed on the cushion pan, when the occupant sits on the cushion shell, the pad is elastically deformed, and the pad The occupant is supported together with the cushion shell by the elastic force.
Here, in the above vehicle seat, since the distance between the holding surface of the holding member and the mounting surface of the cushion pan is constant over the entire surface, the compression rate of the pad when the occupant sits on the cushion shell is uniform as a whole. You can get closer. For this reason, the spring constant of the pad can be lowered as a whole. As a result, the vibration input from the vehicle body to the cushion shell is absorbed at an early stage by the pad, so that the vibration characteristics of the vehicle seat are improved and the riding comfort performance is improved.

  A vehicle seat according to a second aspect is the vehicle seat according to the first aspect, wherein the holding surface and the mounting surface are flat.

In the vehicle seat according to the second aspect, since the holding surface and the mounting surface are flat, the holding surface and the upper surface of the pad, and the mounting surface and the lower surface of the pad are in close contact with each other. For this reason, when the pad thickness changes due to vibration, air is released only from the side surfaces (four surfaces) of the pad, so that the damping performance is improved. For example, the attenuation performance is higher because the upper and lower surfaces of the pad are sealed than the air that is released from the upper and lower surfaces of the pad.
The vehicle seat according to a third aspect is the vehicle seat according to the second aspect, wherein the holding surface and the mounting surface are substantially parallel to a horizontal plane.
According to a fourth aspect of the present invention, in the vehicle seat according to the first aspect, the holding surface and the mounting surface are each formed in a sine wave shape, a zigzag shape, a crank shape, or an arc shape in a side view. ing.

The vehicle seat according to claim 5 is the vehicle seat according to any one of claims 1 to 4 , wherein the cushion shell is movable in a vertical direction to the cushion pan via a link mechanism. It is connected to.

In the vehicle seat according to the fifth aspect , when the occupant sits on the cushion shell, the cushion shell moves downward via the link mechanism. At this time, since the cushion shell moves toward the cushion pan located below with the distance between the holding surface and the mounting surface being constant over the entire surface, the compression ratio of the pad can be made more uniform as a whole.

The vehicle seat according to claim 6 is the vehicle seat according to any one of claims 1 to 5 , wherein the holding member rises from the holding surface and extends in the seat front-rear direction of the cushion shell. A support plate portion that receives the load of the part is provided.

In the vehicle seat according to claim 6 , the load when the occupant is seated on the cushion shell is provided by providing the support member with a support plate portion that rises from the holding surface and receives the load in the front-rear direction of the cushion shell. Can be uniformly transmitted (acted) from the support plate portion to the pad via the holding surface.
The vehicle seat according to claim 7 is the vehicle seat according to claim 6, wherein the holding member is made of sheet metal and is disposed with the plate thickness direction in the vertical direction, and is upward in a side view. It has an open substantially U shape, and the bottom bottom surface is the holding surface.

  The present invention can provide a vehicle seat with improved riding comfort performance.

It is the perspective view which looked at the vehicle seat of 1st Embodiment from the seat diagonally backward rear. It is the perspective view which looked at the frame of the vehicular seat of a 1st embodiment from the seat left slanting back. It is the disassembled perspective view which decomposed | disassembled the lower part of the vehicle seat of 1st Embodiment. It is sectional drawing (5-5 sectional view taken on the line of FIG. 2) which shows the lower part of the vehicle seat of 1st Embodiment. FIG. 5 is a cross-sectional view (cross-sectional view taken along line 5-5 in FIG. 2) showing a state in which an occupant is seated on the vehicle seat of FIG.

Next, the vehicle seat according to the first embodiment of the present invention will be described.
FIG. 1 is a schematic perspective view of a vehicle seat 10 according to the first embodiment. Note that an arrow FR appropriately shown in the drawings indicates the front of the seat, an arrow RH indicates the right side of the seat (one side in the seat width direction), and an arrow UP indicates the upper side.

  As shown in FIG. 1, the vehicle seat 10 includes a seat cushion 50 on which an occupant is seated and a seat back 70 that supports the back of the occupant.

  As shown in FIG. 2, the seat cushion 50 includes a cushion shell 52, and the cushion shell 52 is connected to the vehicle body floor F so as to be movable in the vertical direction by a connection mechanism 12 described later.

  In addition, a seat back frame 72 that constitutes a skeleton of the seat back 70 is supported at a rear end portion of the coupling mechanism 12 so as to be tiltable, and a back shell 74 can be moved relative to the seat back frame 72 in the vertical direction. It is connected.

  The cushion shell 52 and the back shell 74 are connected via a hinge bracket 76, and the occupant seated on the cushion shell 52 is elastically supported by the pad 60 disposed below the cushion shell 52. It is like that.

  As shown in FIG. 2, the coupling mechanism 12 constitutes a lower portion of the vehicle seat 10. The coupling mechanism 12 has a pair of long guide rails 14, and the guide rails 14 are arranged in parallel with the longitudinal direction being the front-rear direction of the seat. Further, both ends in the longitudinal direction of the guide rail 14 are fixed to the vehicle body floor F of the vehicle via a pair of leg brackets 15.

  Each of the pair of guide rails 14 is provided with a long upper rail 16, and the upper rail 16 is configured to be slidable in the seat front-rear direction with respect to the guide rail 14.

  A pair of seat cushion frames 18 are provided above the upper rail 16. The seat cushion frame 18 is made of sheet metal, and the lower portion of the seat cushion frame 18 is fixed to the upper rail 16 by fastening members such as bolts and nuts (not shown). Thereby, the seat cushion frame 18 is configured to be movable in the seat front-rear direction integrally with the upper rail 16.

  The seat cushion frame 18 is provided with a pair of links 20 for connecting a cushion shell 52 to be described later, and the lower end portion of the link 20 is rotatable to the seat cushion frame 18 with the axial direction being the seat width direction. It is supported by. The link 20 is an example of a link mechanism.

  Further, the seat cushion frame 18 on the left side of the seat is provided with a connection bracket 22 for connecting a seat back frame 72, which will be described later, at the rear side of the seat. The connection bracket 22 is made of sheet metal, The thickness direction is arranged with the sheet width direction.

  Further, as shown in FIGS. 3 and 4, the coupling mechanism 12 includes a cushion pan 24 disposed below a holding member 54 described later. The cushion pan 24 is bridged between a pair of seat cushion frames 18. As a result, the cushion shell 52 described above is connected to the seat cushion frame 18 and the cushion pan 24 via the link 20. A pad 60 is placed on the cushion pan 24. The mounting surface 24A on which the pad 60 is mounted is flat. Note that “flat” here refers to a flat surface having no holes (no holes are formed).

  Specifically, the cushion pan 24 is made of sheet metal, and is arranged with the plate thickness direction being the vertical direction, and has a substantially U shape opened upward in a side view, and the upper surface of the bottom portion is a mounting surface. 24A. Further, a front pipe 28 and a rear pipe 30 made of a pipe material are integrally provided at the front end portion and the rear end portion of the cushion pan 24, respectively. The front pipe 28 and the rear pipe 30 are arranged such that the axial direction is the seat width direction, and both end portions in the seat width direction of the front pipe 28 and the rear pipe 30 protrude from the cushion pan 24 to the outside in the seat width direction.

  The both ends of the front pipe 28 and the rear pipe 30 in the seat width direction are coupled to the pair of seat cushion frames 18 by welding or the like, and the cushion pan 24 is fixed to the pair of seat cushion frames 18.

  As shown in FIGS. 2 and 3, a pair of fixing portions 32 are formed at both ends of the cushion pan 24 in the seat width direction at positions on the rear side of the seat. It is bent in a substantially crank shape as seen and protrudes outward from the cushion pan 24 in the seat width direction. The cushion pan 24 is fixed to the pair of seat cushion frames 18 also at the fixing portion 32. For this reason, the cushion pan 24 is connected to the vehicle body floor F via the seat cushion frame 18, the upper rail 16, the guide rail 14, and the like.

  As shown in FIG. 2, the cushion shell 52 is provided above the coupling mechanism 12. The cushion shell 52 is formed in a substantially plate shape, and is disposed with the plate thickness direction in the vertical direction, and is curved so that the rear side portion of the seat is depressed downward (see FIG. 4).

  The upper end portion of the link 20 described above is coupled to the lower portion of the cushion shell 52 at both sides in the seat width direction so as to be rotatable with the axial direction as the seat width direction. Accordingly, the cushion shell 52 is connected to the cushion pan 24 via the link 20 so as to be movable in the vertical direction and the seat front-rear direction with respect to the vehicle body floor F.

  As shown in FIG. 4, a holding member 54 that holds the cushion shell 52 is provided below the cushion shell 52. The holding member 54 has a flat holding surface 54A with which the pad 60 contacts and a pair of front and rear members that rise from the end of the holding surface 54A in the front-rear direction of the seat to the upper side of the seat and receive the load of the cushion shell 52 in the front-rear direction of the seat. Support plate part 54B. The holding member 54 of the present embodiment is made of sheet metal and is arranged with the plate thickness direction being the vertical direction, and has a substantially U shape opened upward in a side view. It is a holding surface 54A.

  A pad 60 that is placed on the cushion pan 24 and elastically supports the holding member 54 is disposed between the cushion pan 24 and the cushion shell 52. The pad 60 is made of a soft foamed synthetic resin (for example, urethane) formed in a substantially rectangular parallelepiped shape. The upper surface 60A is in contact with the holding surface 54A of the holding member 54, and the lower surface 60B is the mounting surface of the cushion pan 24. 24A is in contact. The pad 60 has a constant thickness (distance between the upper surface 60A and the lower surface 60B) in an uncompressed state.

As shown in FIG. 4, the distance T between the holding surface 54 </ b> A of the holding member 54 and the mounting surface 24 </ b> A of the cushion pan 24 is constant over the entire surface when the occupant is not seated (the occupant is not seated on the seat). It is said that. The “constant” includes about ± 10% of the interval T as a sheet manufacturing error.
In the present embodiment, the holding surface 54A and the mounting surface 24A are substantially parallel to the horizontal plane.

  As shown in FIG. 2, the seat back frame 72 is made of a pipe material, and is bent into a substantially inverted U shape that is opened downward as viewed from the front of the seat. The left end of the seat back frame 72 is rotatably supported by the connecting bracket 22 with the axial direction being the seat width direction. On the other hand, the right end of the seat back frame 72 is rotatably connected to the seat cushion frame 18 via a conventionally known reclining mechanism (not shown).

  The back shell 74 is formed in a substantially plate shape. The back shell 74 is disposed inside the seat back frame 72 when viewed from the front of the seat, with the plate thickness direction being the front-rear direction of the seat. A pair of hinge brackets 76 is fixed to the lower end of the back shell 74 in the seat, and the outer end of the hinge bracket 76 in the seat width direction rotates to the cushion shell 52 with the axial direction as the seat width. Supported as possible.

  A guide mechanism 78 is provided on the back surface of the back shell 74, and the back shell 74 is connected to the seat back frame 72 so as to be movable in the vertical direction by the guide mechanism 78.

Next, the operation and effect of this embodiment will be described.
In the vehicle seat 10, as shown in FIG. 5, since the cushion shell 52 is elastically supported by the pad 60 placed on the cushion pan 24, when the occupant sits on the cushion shell 52, the pad 60 is Due to elastic deformation, the occupant is supported together with the cushion shell 52 by the elastic force of the pad 60.

  Here, the vehicle seat 10 is configured such that the interval T between the holding surface 54A of the holding member 54 and the mounting surface 24A of the cushion pan 24 is constant over the entire surface in the non-sitting state of the occupant. The compression rate of the pad 60 when the occupant is seated on the cushion shell 52 can be made uniform as a whole. In particular, when an occupant sits on the cushion shell 52, the cushion 20 moves toward the lower cushion pan 24 with the distance T between the holding surface 54A and the mounting surface 24A constant over the entire surface by the link 20. Therefore, the compression ratio of the pad can be made more uniform as a whole. For this reason, the spring constant of the pad 60 can be lowered as a whole. Thereby, since the vibration input from the vehicle body to the cushion shell 52 is absorbed at an early stage by the pad 60, the vibration characteristics of the vehicle seat 10 are improved, and the riding comfort performance is improved.

  In the vehicle seat 10, the holding surface 54 </ b> A and the placement surface 24 </ b> A are each flat (a flat surface having no holes), so the holding surface 54 </ b> A and the upper surface 60 </ b> A of the pad 60, and the placement surface 24 </ b> A and the pad 60. The lower surfaces 60B of the two are in close contact with each other. For this reason, when the pad thickness changes due to vibration, air is released only from the side surfaces (four surfaces) of the pad 60, so that the damping performance is improved. For example, the attenuation performance is higher because the upper surface 60A and the lower surface 60B of the pad 60 are sealed than the air that is released from the upper surface 60A and the lower surface 60B of the pad 60.

  Furthermore, in the vehicle seat 10, when the occupant is seated on the cushion shell 52, the holding member 54 is provided with the support plate portion 54 </ b> B that rises from the holding surface 54 </ b> A and receives the load in the front-rear direction of the cushion shell 52. Can be uniformly transmitted (acted) from the support plate portion 54B to the pad 60 via the holding surface 54A.

  In the first embodiment, as shown in FIG. 4, the holding surface 54A and the mounting surface 24A are formed flat, but the present invention is not limited to this configuration, and the holding surface 54A and the mounting surface 24A If the interval T is constant, for example, the holding surface 54A and the mounting surface 24A may be formed in a sine wave shape, a zigzag shape, a crank shape, an arc shape, or the like in a side view (viewed from the sheet width direction). . Further, the holding surface 54A and the mounting surface 24A may be inclined at a slight angle with respect to the horizontal plane in a side view.

  Further, in the first embodiment, the holding surface 54A and the placement surface 24A are flat (a flat surface having no holes), but the present invention is not limited to this configuration, and the holding surface 54A and the placement surface 24A are provided. Each may have a flat surface with holes (having holes formed).

  The embodiments of the present invention have been described above with reference to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to these embodiments.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 24 Cushion pan 24A Mounting surface 52 Cushion shell 54 Holding member 54A Holding surface 54B Support plate part 60 Pad 60A Upper surface 60B Lower surface T Space | interval

Claims (7)

A cushion pan connected to the car body,
  A pad placed on the cushion pan;
  A holding member elastically supported by the pad;
  A cushion shell held by the holding member and seated by an occupant;
  The mounting surface formed on the upper surface of the cushion pan and the lower surface of the pad are in close contact, and the upper surface of the pad and the holding surface formed on the bottom of the holding member are in close contact, A vehicle seat in which a distance between the holding surface and the holding surface is constant over the entire surface.   The vehicle seat according to claim 1, wherein the holding surface and the mounting surface are flat. The vehicle seat according to claim 2, wherein the holding surface and the mounting surface are substantially parallel to a horizontal plane. The vehicle seat according to claim 1, wherein the holding surface and the placement surface are each formed in a sine wave shape, a zigzag shape, a crank shape, or an arc shape in a side view. The vehicle seat according to any one of claims 1 to 4, wherein the cushion shell is connected to the cushion pan so as to be movable in a vertical direction via a link mechanism. The vehicle seat according to any one of claims 1 to 5 , wherein the holding member includes a support plate portion that rises from the holding surface and receives a load of a portion of the cushion shell in the front-rear direction of the seat. The holding member is made of sheet metal, is disposed with the plate thickness direction being the vertical direction, and has a substantially U shape opened upward in a side view, and the bottom lower surface serves as the holding surface. The vehicle seat according to claim 6.