JP2013230736A - Vehicle seat - Google Patents

Abstract

[PROBLEMS] To improve riding comfort performance in a difference in weight of passengers with a simple configuration.
In the vehicle seat, since a part of the pad (second pad portion 66) is configured to be removable, the pad in the initial state is compared with the spring constant of the pad in the detached state. The spring constant of 60 can be set high. That is, the spring constant of the pad 60 in the detached state can be set for a passenger with a set weight, and the spring constant of the pad 60 in the initial state can be set for a passenger with a weight heavier than the set weight. As a result, when an occupant with a weight heavier than the set weight uses the vehicle seat 10, the pad 60 remains in the initial state and the occupant with the set weight uses the vehicle seat 10. By making the pad 60 into the removed state, the spring constant of the pad 60 can be easily adapted to the weight of the occupant. Therefore, the riding comfort performance in the weight difference of the occupant can be improved with a simple configuration.
[Selection] Figure 1

Description

  The present invention relates to a vehicle seat provided with a pad that elastically supports a cushion shell.

  In the vehicle seat described in Patent Document 1 below, 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 the 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

  However, in this vehicle seat, since the cushion shell is supported by the elastic force of the cushion support pad, the ride comfort performance may deteriorate due to the weight difference of the occupant. That is, for example, since the spring constant of the cushion support pad is set with respect to a set weight (hereinafter referred to as “set weight”), if an occupant with a weight heavier than the set weight sits on the cushion shell, the cushion support pad The sinking amount of the pad becomes large. Conversely, if the cushion support pad spring constant is set for a weight that is heavier than the set weight, and the passenger with the set weight sits on the cushion shell, the cushion support pad will have the appropriate cushioning properties for the passenger with the set weight. It may not be possible.

  Therefore, for example, if a cushion support pad corresponding to the weight of the occupant is prepared in advance and the cushion support pad is replaced according to the weight of the occupant, a large work is required. Therefore, it is desirable to be able to cope with riding comfort performance with respect to the weight difference of the occupant with a simple configuration.

  In view of the above facts, an object of the present invention is to provide a vehicle seat that can improve riding comfort performance in a weight difference of an occupant with a simple configuration.

  The vehicle seat according to claim 1 includes a cushion shell on which an occupant is seated and a cushion pan disposed below the cushion shell, and the cushion shell is connected to the vehicle body so as to be movable in the vertical direction. And a pad that is provided between the cushion pan and the cushion shell, elastically supports the cushion shell, and is configured to be partly removable.

  In the vehicle seat according to the first aspect, a pad is provided between the cushion pan and the cushion shell, and the pad elastically supports the cushion shell. Thus, when the occupant sits on the cushion shell, the pad is elastically deformed, and the occupant and the cushion shell are supported by the elastic force of the pad.

  Here, a part of the pad is configured to be removable. For this reason, compared with the spring constant of the pad in a state in which a part of the pad has been removed (hereinafter referred to as “removed state”), the state before the part of the pad is removed (hereinafter referred to as this The spring constant of the pad of the state (referred to as “initial state”) can be set high. As a result, the spring constant of the pad in the detached state can be set for a passenger with a set weight, and the spring constant of the pad in the initial state can be set for a passenger with a weight heavier than the set weight. That is, when a passenger with a set weight uses the vehicle seat, a part of the pad is removed from the pad (with the pad removed), and a passenger with a weight heavier than the set weight uses the vehicle seat. When doing so, by leaving the pad in its initial state, the spring constant of the pad can easily correspond to the weight of the occupant. Therefore, the riding comfort performance in the weight difference of the occupant can be improved with a simple configuration.

  The vehicle seat according to claim 2 is the vehicle seat according to claim 1, wherein the pad is divided into a first pad portion and a second pad portion, and the cushion pan is the first pad portion. The first cushion pan is divided into a first cushion pan supporting the first pad portion and a second cushion pan supporting the second pad portion, and the second cushion pan is detachably attached to the first cushion pan. .

  In the vehicle seat according to claim 2, the pad is configured to be divided into a first pad portion and a second pad portion, and the cushion pan is a first cushion pan that supports the first pad portion; A second cushion pan that supports the second pad portion is divided and configured.

  Here, the second cushion pan is detachably attached to the first cushion pan. For this reason, by removing the second cushion pan from the first cushion pan, the second pad can be easily detached from the pad together with the second cushion pan.

  A vehicle seat according to a third aspect is the vehicle seat according to the second aspect, wherein the second pad portion and the second cushion pan are arranged on the rear side of the cushion shell.

  In the vehicle seat according to claim 3, since the second pad portion and the second cushion pan are disposed on the rear side of the seat in the cushion shell, the seat portion of the seated occupant is mainly supported by the second pad portion. Can be made. That is, the spring constant of the pad can be changed at the rear portion of the cushion shell where the weight of the occupant mainly acts. Therefore, the riding comfort performance for the occupant can be improved efficiently.

  According to a fourth aspect of the present invention, in the vehicle seat according to the second or third aspect, the first pad portion has a concave portion opened to the rear side of the seat in a plan view. Two pad portions are disposed in the recess.

  In the vehicle seat according to the fourth aspect, for example, when the pad is formed in a rectangular shape in plan view, the four corners of the first pad portion support the cushion shell in both the initial state and the detached state. Therefore, even if the pad is divided into the first pad portion and the second pad portion, the cushion shell can be stably supported by the pad.

  According to the vehicle seat of the first aspect, it is possible to improve the riding comfort performance in the weight difference of the occupant with a simple configuration.

  According to the vehicle seat of the second aspect, the second pad can be easily detached from the pad.

  According to the vehicle seat of the third aspect, the riding comfort performance for the occupant can be improved efficiently.

  According to the vehicle seat of the fourth aspect, the cushion shell can be stably supported by the pad.

It is the schematic perspective view seen from the sheet | seat left diagonal back which shows the vehicle seat which concerns on this Embodiment. It is the schematic perspective view seen from the seat left diagonal back which shows the time of removing the 2nd pad part used for the vehicle seat shown by FIG. It is the schematic perspective view seen from the seat left diagonal back which shows the frame | skeleton of the vehicle seat shown by FIG. FIG. 4 is an exploded perspective view of a coupling mechanism and a seat cushion shown in FIG. 3. FIG. 5 is a schematic cross-sectional view (a cross-sectional view taken along line 5-5 in FIG. 3) showing a lower portion of the vehicle seat shown in FIG. 3. FIG. 6 is a schematic cross-sectional view (a cross-sectional view taken along line 6-6 in FIG. 3) showing a lower portion of the vehicle seat shown in FIG.

  FIG. 1 is a perspective view schematically showing a vehicle seat 10 according to an embodiment of the present invention. 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.

(About the entire vehicle seat 10)

  As shown in this figure, 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. 3, the seat cushion 50 includes a cushion shell 52, and the cushion shell 52 is coupled to the vehicle body floor F by the coupling mechanism 12 so as to be movable in the vertical direction.

  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 coupled via a hinge bracket 76, and a passenger seated on the cushion shell 52 is supported by a pad 60 disposed below the cushion shell 52. ing. Hereinafter, these configurations of the vehicle seat 10 will be described in detail.

(Regarding the configuration of the vehicle seat 10)

  The coupling mechanism 12 constitutes the lower part 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.

  As shown in FIG. 4, 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 (in FIG. 4, the link 20 is shown on the cushion shell 52 side), and the lower end of the link 20 The portion is rotatably supported by the seat cushion frame 18 with the axial direction being the seat width direction.

  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, the coupling mechanism 12 has a cushion pan 24. The cushion pan 24 includes a first cushion pan 26 and a second cushion pan 40 and is spanned between the pair of seat cushion frames 18.

  As shown in FIG. 5, the first cushion pan 26 is made of sheet metal and is arranged with the plate thickness direction being the vertical direction, and is bent into a substantially U shape opened upward in a side view. Yes. 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 first cushion pan 26, respectively. The front pipe 28 and the rear pipe 30 are arranged so that the axial direction is the seat width direction, and both ends of the front pipe 28 and the rear pipe 30 are projected from the first cushion pan 26 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 respectively connected to the pair of seat cushion frames 18 by welding or the like, whereby the first cushion pan 26 is fixed to the pair of seat cushion frames 18. Yes.

  Further, as shown in FIG. 4, a pair of fixing portions 32 are formed at both ends of the first cushion pan 26 in the seat width direction at positions on the rear side of the seat, and the fixing portions 32 are viewed from the rear of the seat. The first cushion pan 26 is bent outwardly in the seat width direction. The first cushion pan 26 is fixed to the pair of seat cushion frames 18 also at the fixing portion 32.

  As shown in FIG. 5, an opening 34 is formed through the rear side portion of the first cushion pan 26 at the center portion in the seat width direction, and the opening portion 34 has a substantially rectangular shape. The first cushion pan 26 is formed from the bottom wall to the rear wall. As shown in FIGS. 4 and 6, a pair of engaged holes for attaching a second cushion pan 40 to be described later to the rear wall of the first cushion pan 26 on both sides of the opening 34 in the seat width direction, as shown in FIGS. 4 and 6. 36 is formed through, and the engaged hole 36 has a substantially rectangular shape.

  The second cushion pan 40 is made of sheet metal and has a substantially trapezoidal shape in plan view. Further, the second cushion pan 40 is disposed so as to be in contact with the bottom wall of the first cushion pan 26 below the opening 34 and cover the opening 34.

  As shown in FIG. 5, three engagement pieces 42 are formed at the front end portion of the second cushion pan 40, and the engagement pieces 42 are formed in a substantially crank shape in a side view and are second cushions. It protrudes from the pan 40 to the upper side and the front side of the seat. The engagement piece 42 is disposed on the upper side of the front edge of the seat in the opening 34 of the first cushion pan 26 and is engaged with the edge in the vertical direction. Thereby, the downward movement of the second cushion pan 40 is restricted.

  The rear part of the second cushion pan 40 is bent upward, and the tip part is formed in an annular shape (curl shape). As shown in FIG. 6, an engagement claw portion 44 is formed on the rear wall of the second cushion pan 40 at a position corresponding to the pair of engaged holes 36 of the first cushion pan 26 described above. The engagement claw portion 44 is cut and raised from the rear wall of the second cushion pan 40 toward the seat front side. The engaging claw 44 is inserted into the engaged hole 36, and the engaging claw 44 is engaged with the edge of the engaged hole 36. Thereby, the 2nd cushion pan 40 is attached to the 1st cushion pan 26 so that removal is possible.

  As shown in FIG. 3, 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. 5).

  The lower end of the cushion shell 52 is coupled to the upper ends of the links 20 described above on both sides in the seat width direction so as to be rotatable with the axial direction as the seat width direction. It is configured to be movable in the seat vertical direction and the seat front-rear direction with respect to (vehicle body floor F).

  Further, as shown in FIG. 5, a substantially plate-like contact panel 54 is fixed to the lower part of the cushion shell 52, and the contact panel 54 is bent into a substantially U shape opened upward in a side view. Has been. The bottom wall of the contact panel 54 is disposed in parallel with the bottom wall of the first cushion pan 26 and the bottom wall of the second cushion pan 40.

  As shown in FIGS. 4 and 5, the pad 60 is provided between the cushion pan 24 and the cushion shell 52 (contact panel 54). The pad 60 includes a first pad portion 62 and a second pad portion 66, and is formed in a substantially rectangular parallelepiped shape as a whole.

  The first pad portion 62 is made of a soft foam synthetic resin or the like. Further, the first pad portion 62 is formed in a block shape having a concave shape opened to the rear side of the seat in a plan view, and the portion opened to the rear side of the seat accommodates the pad as a “concave portion”. Part 64. The upper surface of the first pad portion 62 is in contact with the bottom wall of the contact panel 54 of the cushion shell 52, and the lower surface of the first pad portion 62 is in contact with the bottom wall of the first cushion pan 26. ing.

  The second pad portion 66 is made of a soft foam synthetic resin or the like made of the same material as the first pad portion 62. Further, the second pad portion 66 is formed in a substantially rectangular parallelepiped shape and is disposed in the pad accommodating portion 64 of the first pad portion 62 and is disposed below the seat rear side portion in the cushion shell 52. . The upper surface of the second pad portion 66 is in contact with the bottom wall of the contact panel 54 of the cushion shell 52, and the lower surface of the second pad portion 66 is in contact with the bottom wall of the second cushion pan 40. ing.

  Thereby, the cushion shell 52 is elastically supported by the first pad portion 62 and the second pad portion 66 (the state shown in FIG. 1, this state is hereinafter referred to as “initial state”). When an occupant sits on the shell 52, the cushion shell 52 presses the first pad portion 62 and the second pad portion 66 downward, so that the first pad portion 62 and the second pad portion 66 are elastically deformed. ing.

  On the other hand, the 2nd pad part 66 can be removed from the opening part 34 of the 1st cushion pan 26 by removing the 2nd cushion pan 40 mentioned above from the 1st cushion pan 26 (refer FIG. 2). That is, in this state, the cushion shell 52 is supported only by the first pad portion 62 (hereinafter, this state is referred to as a “detached state”).

  Here, the area of the second pad portion 66 in plan view is set to 1/3 of the area of the first pad portion 62. For this reason, the spring constant of the pad 60 in the initial state is set larger than the spring constant of the pad 60 in the detached state. The spring constant of the pad 60 in the removed state is set with respect to the weight of the set weight (set weight), and the spring constant of the pad 60 in the initial state is set to a weight of weight heavier than the set weight. Is set. As a result, when an occupant having a set weight uses the vehicle seat 10, the pad 60 is removed and the vehicle seat 10 is used. When the vehicle seat 10 is used, the vehicle seat 10 is used with the pad 60 in the initial state.

  As shown in FIG. 3, 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 the present embodiment will be described.

  First, when an occupant whose weight is heavier than the set weight uses the vehicle seat 10, the pad 60 is in an initial state. In this state, the first pad portion 62 and the second pad portion 66 are disposed below the cushion shell 52, and the cushion shell 52 is elastically supported by the first pad portion 62 and the second pad portion 66. Yes.

  When an occupant with a weight heavier than the set weight is seated on the cushion shell 52, the occupant is seated so that the butt portion of the occupant is almost directly above the second pad portion 66, and the cushion shell 52 is changed depending on the occupant's weight. The first pad portion 62 and the second pad portion 66 are pressed downward. Accordingly, the first pad portion 62 and the second pad portion 66 are elastically deformed, and the cushion shell 52 is moved downward while following the elastic deformation of the first pad portion 62 and the second pad portion 66. An upward elastic force acts on the cushion shell 52 from the first pad portion 62 and the second pad portion 66 (see the two-dot chain line in FIG. 5). Therefore, since the cushion shell 52 and the occupant are supported by the elastic force of the first pad portion 62 and the second pad portion 66, the amount of sinking to the lower side of the cushion shell 52 is suppressed, and the occupant is suppressed. Riding comfort performance is secured.

  On the other hand, when an occupant having a set weight uses the vehicle seat 10, the pad 60 is removed. That is, the rear end portion of the second cushion pan 40 is elastically deformed so as to rotate downward, and the engaging claw portion 44 of the second cushion pan 40 is detached from the engaged hole 36 of the first cushion pan 26. Let As a result, the second cushion pan 40 is removed from the first cushion pan 26 so as to rotate downward about the engagement piece 42 (see the two-dot chain line in FIG. 5), and the second pad portion. 66 is removed from the opening 34 of the first cushion pan 26. Therefore, only the first pad portion 62 is disposed below the cushion shell 52, and the cushion shell 52 is supported only by the first pad portion 62.

  When an occupant having a set weight sits on the cushion shell 52, the occupant is seated so that the butt portion of the occupant is substantially directly above the pad accommodating portion 64 of the first pad portion 62, and the cushion shell 52 depends on the occupant's weight. Presses the first pad portion 62 downward. As a result, the first pad portion 62 is elastically deformed, the cushion shell 52 is moved downward following the elastic deformation of the first pad portion 62, and upward from the first pad portion 62 to the cushion shell 52. The elastic force of acts. Accordingly, since the cushion shell 52 and the occupant are supported by the elastic force of only the first pad portion 62, an appropriate cushioning property is given to the occupant having the set weight.

  As described above, in the vehicle seat 10, a part of the pad 60 (second pad portion 66) is configured to be removable, so that it is in an initial state as compared with the spring constant of the pad 60 in the detached state. The spring constant of the pad 60 can be set high. That is, as described above, the spring constant of the pad 60 in the detached state can be set for a passenger with a set weight, and the spring constant of the pad 60 in the initial state can be set for a passenger with a weight heavier than the set weight. Thus, when an occupant with a weight heavier than the set weight uses the vehicle seat 10, the pad 60 is left in the initial state, and when the occupant with the set weight uses the vehicle seat 10, By removing 60, the spring constant of the pad 60 can easily correspond to the weight of the occupant. Therefore, the riding comfort performance in the weight difference of the occupant can be improved with a simple configuration.

  As described above, the second cushion pan 40 is detachably attached to the first cushion pan 26. Therefore, by removing the second cushion pan 40 from the first cushion pan 26, the second pad 60 can be easily removed from the opening 34 of the first cushion pan 26 together with the second cushion pan 40.

  Further, the second pad portion 66 and the second cushion pan 40 are disposed on the rear side of the seat in the cushion shell 52. For this reason, the 2nd pad part 66 is arrange | positioned substantially under the seat passenger's buttocks, and mainly supports the seat passenger's buttocks. Thereby, since the spring constant of the pad 60 can be changed at the seat rear portion of the cushion shell 52 where the weight of the occupant mainly acts, the riding comfort performance for the occupant can be improved efficiently.

  Further, the first pad portion 62 is formed in a block shape having a concave shape opened to the rear side of the seat in plan view. The second pad 60 is disposed in the pad housing portion 64 of the first pad portion 62. Therefore, the four corners of the first pad portion 62 support the cushion shell 52 in both the initial state and the removed state. Therefore, even if the pad 60 is divided into the first pad portion 62 and the second pad portion 66, the cushion shell 52 can be stably supported by the pad 60.

  In the present embodiment, the pad 60 is divided into a first pad portion 62 and a second pad portion 66. Instead, the first pad portion 62 and the second pad portion 66 are integrally formed, and a slit or the like is formed in the integrated pad 60 so that the pad 60 is replaced with the first pad portion 62 and the second pad portion. It may be configured to be divided into 66. Accordingly, the first pad portion 62 and the second pad portion 66 may be separated from the slit as a starting point, and the second pad portion 66 may be removed from the vehicle seat 10.

  Further, in the present embodiment, the first pad portion 62 is formed in a block shape having a concave shape opened to the rear side of the seat in plan view, and the second pad portion 66 is formed in a substantially rectangular parallelepiped shape. The shapes of the first pad portion 62 and the second pad portion 66 are not limited to this. For example, the second pad portion 66 may be formed in a triangular prism shape. In this case, the pad accommodating portion 64 may have a triangular cross section corresponding to the shape of the second pad portion 66.

  Furthermore, in the present embodiment, the area of the second pad portion 66 is set to 1/3 of the area of the first pad portion 62 in plan view, but the first pad portion of the second pad portion 66 is The area ratio for 62 can be arbitrarily set. Thereby, the spring constant of the pad 60 in an initial state and a removal state can be easily changed.

  In the present embodiment, the first pad portion 62 and the second pad portion 66 are made of the same material, such as soft foam synthetic resin. That is, the first pad portion 62 and the second pad portion 66 are set to the same hardness. Instead, the first pad portion 62 and the second pad portion 66 may be set to different hardnesses. Thereby, also in this case, the spring constant of the pad 60 in the initial state and the detached state can be easily changed. Furthermore, by combining the area ratio setting of the second pad portion 66 with respect to the first pad portion 62 and the hardness setting of the first pad portion 62 and the second pad portion 66, the pad 60 in the initial state and the removed state is combined. The design freedom for the spring constant can be expanded.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 12 Connection mechanism 24 Cushion pan 26 1st cushion pan 40 2nd cushion pan 52 Cushion shell 60 Pad 62 1st pad part 64 Pad accommodating part (recessed part)
66 Second Pad Part

Claims (4)

A cushion shell on which an occupant sits;
A coupling mechanism that has a cushion pan disposed on the lower side of the cushion shell, and that couples the cushion shell movably in the vertical direction with respect to the vehicle body;
A pad that is provided between the cushion pan and the cushion shell, elastically supports the cushion shell, and partly configured to be removable;
Vehicle seat equipped with The pad is divided into a first pad portion and a second pad portion,
The cushion pan is divided into a first cushion pan that supports the first pad portion and a second cushion pan that supports the second pad portion.
The vehicle seat according to claim 1, wherein the second cushion pan is detachably attached to the first cushion pan. The vehicle seat according to claim 2, wherein the second pad portion and the second cushion pan are disposed on a seat rear side of the cushion shell. The first pad portion has a recess opened to the back side of the seat in plan view,
The vehicle seat according to claim 2 or 3, wherein the second pad portion is disposed in the recess.