JP6126959B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat in which a seat cushion pad is assembled to a seat cushion frame of a seat cushion portion.

  Patent Document 1 below discloses a vehicle seat in which an angle of a seat back portion with respect to a seat cushion portion can be adjusted by a reclining device. In the seat cushion portion of the vehicle seat, a seat cushion pad is assembled to a seat cushion frame, and the seat cushion pad is covered with a skin.

Japanese Patent Laid-Open No. 2001-70079

  In the vehicle seat described above, the seat width direction end of the seat cushion pad covers the outer walls of the side frames provided at both ends of the seat cushion frame in the seat width direction. As a result, when the occupant sits on the seat cushion portion, the end portion of the seat cushion pad is unlikely to drop down to the seat lower side. By the way, when the seat width direction end portion of the seat cushion pad and the rear side portion on the seat rear side are arranged so as to overlap with the upper end portion of the side frame and are not covered with the outer wall, the vehicle Slimming in the sheet width direction of the sheet for use can be realized. However, for example, when the passenger stands on the knee and rides on the rear part of the seat cushion part, a local load is generated on the rear part. For this reason, there is a concern that the rear side portion of the seat cushion pad sinks (drops) toward the lower side of the seat, and the rear side portion is caught by the edge of the upper end portion of the side frame and cannot be restored.

  On the other hand, the sinking of the seat cushion pad can be solved by stretching a wire that supports the seat cushion pad to the lower portion of the seat cushion pad on the seat cushion frame. However, since the wire bites into the seat cushion pad and the elastic force of the seat cushion pad decreases, there is a concern that the passenger's sitting comfort (riding comfort) may be impaired. Accordingly, there has been a demand for the development of a vehicle seat that can provide a good sitting comfort while improving the resilience of the seat cushion pad against the sinking at the rear side.

  In view of the above facts, an object of the present invention is to provide a vehicle seat that can improve the resilience of the seat cushion pad with respect to the sinking at the rear side portion and can obtain a good sitting comfort.

The vehicle seat according to the invention described in claim 1 is provided along the seat front-rear direction on the seat lower side of the seat width direction end portion of the seat cushion portion, and the upper end portion is bent inward in the seat width direction. A seat cushion frame having a side frame, a seat cushion pad supported by the seat cushion frame and arranged so that a rear side portion on the rear side of the seat overlaps with an upper end portion in the seat width direction, and an upper end part of the disposed between the seat upper side is formed in an inverted U-shape which is open in the sheet downward to cover from the upper end portion and a rear side, the cover inner wall located inside the seat width direction of the upper end sheet width and a, an inner cover which extends into the sheet over preparative lower side than the edge which is located inwardly.

  In the vehicle seat according to the first aspect, the seat cushion pad is supported by the seat cushion frame of the seat cushion portion. The rear side portion of the seat cushion pad is disposed so as to overlap the upper end portion of the side frame.

  Here, an inner cover is provided between the upper end portion of the side frame and the rear side portion of the seat cushion pad. The inner cover extends from the upper end to the inner side in the sheet width direction and the lower side of the sheet. For example, when the occupant stands with his knees and rides on the rear part of the seat cushion pad, a local load is generated in the rear part, and the rear side part sinks to the seat lower side than the upper end part of the side frame. The inner cover allows movement along the inner cover on the rear side without contacting the rear side and the upper end. For this reason, since there is no catch between the rear side portion and the upper end portion, for example, an edge, even if the rear side portion sinks, it can be restored. Further, since the rear side portion can be restored, it is not necessary to support the rear side portion with a wire or the like. For this reason, the elasticity at the rear side is not impaired.

Furthermore, according to the vehicle seat of the first aspect , the inner cover is formed in an inverted U shape that is open in the seat lower direction covering the upper end portion from the seat upper side. Furthermore, the cover inner wall of the inner cover extends to the lower side of the seat from the edge of the upper end portion. For this reason, it is possible to position the inner cover in the seat width direction with respect to the side frame only by overlapping the inner cover with the upper end portion.

In the vehicle seat according to the second aspect of the present invention, in the first aspect, the inner cover enables movement of the rear side portion in the vertical direction of the seat along the inner wall of the cover .

  According to a third aspect of the present invention, in the vehicle seat according to the second aspect, the cover inner wall end portion that is bent outward in the seat width direction from the cover inner wall is provided at the lower end of the cover inner wall.

  According to the vehicle seat of the third aspect, the cover inner wall end is provided at the lower end of the cover inner wall in the inner cover, and the cover inner wall end is bent outward in the seat width direction from the cover inner wall. . For this reason, for example, the edge of the upper end portion of the side frame is covered by the end portion of the inner wall of the cover of the inner cover, so that even if the rear portion of the seat cushion pad sinks, the rear side portion of the seat cushion pad becomes the edge of the upper end portion. Even more difficult to catch.

  In the vehicle seat according to the invention described in claim 4, in any one of claims 1 to 3, the inner cover is manufactured by molding a resin material.

  According to the vehicle seat of the fourth aspect, since the inner cover is manufactured by molding the resin material, the inner cover does not require mechanical processing such as bending after molding.

  A vehicle seat according to a fifth aspect of the present invention is the vehicle seat according to any one of the first to fourth aspects, wherein the inner cover is formed integrally with a design cover that covers the inner wall of the side frame on the rear side of the seat. ing.

According to the vehicle seat of the fifth aspect, since the inner cover is formed integrally with the design cover of the side frame, the inner cover and the design cover are one component.
The vehicle seat according to the invention described in claim 6 is provided along the seat front-rear direction on the seat lower side of the seat cushion in the seat width direction, and the upper end is bent inward in the seat width direction. A seat cushion frame having a side frame, and supported by the seat cushion frame, covering the outer wall of the side frame from the front end portion and the middle portion of the seat front side of the upper end portion and hanging downward to the seat lower side The seat cushion pad is disposed between the upper end portion and the rear side portion so that the rear side portion on the rear side of the seat that does not have the pad hanging portion overlaps the upper end portion. And an inner cover extending from the upper end to the inner side in the sheet width direction and the lower side of the sheet.

The vehicle seat according to the invention described in claim 1 or claim 6 can improve the restoring force against the sinking at the rear side portion of the seat cushion pad and improve the sitting comfort of the passenger. It has an excellent effect of being able to.

  The vehicle seat according to the invention described in claim 2 has an excellent effect that the work of assembling the inner cover to the side frame can be simplified.

  The vehicle seat according to the invention described in claim 3 further eliminates the catch between the rear side portion of the seat cushion pad and the upper end portion of the side frame, and further improves the restoring force of the rear side portion. It has an excellent effect of being able to.

  The vehicle seat according to the invention described in claim 4 has an excellent effect that the inner cover can be manufactured easily and inexpensively.

  The vehicle seat according to the invention described in claim 5 has an excellent effect that the number of parts can be reduced.

It is the perspective view which looked at the vehicle seat which concerns on one embodiment of this invention from the seat front and the seat width direction outer side a little from the seat upper direction. It is the perspective view which looked at the flame | frame of the vehicle seat shown by FIG. 1 from the same direction. FIG. 2 is an enlarged perspective view of a main part of the vehicle seat shown in FIG. 1, in particular, an inner cover and a surrounding configuration as viewed from the front of the seat and slightly above the seat width direction. FIG. 2 is an enlarged perspective view of the inner cover of the vehicle seat shown in FIG. 1 and the surrounding structure as viewed from the front of the seat and slightly above the seat in the seat width direction. FIG. 2 is an enlarged perspective view of the inner cover of the vehicle seat shown in FIG. 1 and the surrounding structure when viewed from the front of the seat and slightly above the seat width direction outside. It is the schematic sectional drawing which looked at the side frame in the AA cross section shown by FIG. 3, a seat cushion pad, and the inner cover from the direction which an arrow points. FIG. 7 is a schematic cross-sectional view corresponding to FIG. 6 of a side frame, a seat cushion pad, and an inner cover when a load is generated on the seat cushion pad. FIG. 4 is an enlarged perspective view showing the main part of the vehicle seat shown in FIG. 3 as seen from slightly above the outside in the seat width direction.

  Hereinafter, a vehicle seat according to an embodiment to which the present invention is applied will be described with reference to FIGS. In the drawings, an arrow FR appropriately shown indicates the front direction of the vehicle seat, an arrow IN indicates the seat width direction inner side, and an arrow UP indicates the seat upward direction. In the description of the present embodiment, the front direction of the seat, the inner side of the seat width direction, and the upper direction of the seat are respectively the front direction of the vehicle, the inner side of the vehicle width direction, and the upper direction of the vehicle. Have been matched.

(Overall configuration of vehicle seat)
As shown in FIG. 1, the vehicle seat 10 according to the present embodiment is configured as a driver seat or a passenger seat of a vehicle such as an automobile. The vehicle seat 10 includes a seat cushion portion 12 on which a passenger sits, and a seat back portion 14 as a backrest provided at a rear end portion of the seat cushion portion 12 via a reclining device 16.

  A pair of seat rails 24 that extend along the seat front-rear direction and are arranged in parallel with the seat width direction are fixed to the interior floor of the vehicle (not shown). A pair of slide rails 20 provided at both ends of the seat width direction at the lower portion of the seat cushion portion 12 are attached to the seat rail 24 so as to be movable in the seat front-rear direction. A front / rear adjustment lever 22 is installed between the pair of slide rails 20. By operating the front / rear adjustment lever 22, the vehicle seat 10 can be moved in the front / rear direction of the seat along the seat rail 24, and can be fixed to the seat rail 24 at an arbitrary position on the seat rail 24. .

(Overall configuration of seat frame)
As shown in FIG. 2, the vehicle seat 10 includes a seat cushion frame 30 constituting the seat cushion portion 12 and a seat back frame 42 constituting the seat back portion 14. The seat cushion frame 30 includes a pair of side frames 32.

  One of the pair of side frames 32 extends in the longitudinal direction of the seat and has the longitudinal direction of the seat as the short direction. The other of the pair of side frames 32 has the same configuration as that of the one side frame 32, and is spaced apart from and substantially parallel to the one side frame 32 in the seat width direction. As shown in FIGS. 2 to 8, the upper end portions 32H of the pair of side frames 32 are both frame outer walls (frame upper outer wall portions) 32A extending along the seat upper direction, and frame outer walls 32A. A frame upper wall 32B that is bent inward in the seat width direction from the upper end, and a frame inner wall 32C that is bent in the seat lower direction from the seat width direction inner end of the frame upper wall 32B and that has a sheet lower end as an edge 32E. I have. That is, the upper end portion 32H is formed in an inverted U shape that is opened downward in the seat when viewed from the front of the seat. The pair of side frames 32 is manufactured by, for example, press forming of a steel plate material. The pair of side frames 32 may be manufactured by injection molding of a resin material. The cross-sectional shape of the upper end portion 32H of the pair of side frames 32 is not limited to an inverted U shape when viewed from the front of the seat, and may be, for example, an inverted L shape or an inverted J shape.

(Pad configuration)
As shown in FIGS. 3 and 6 to 8, the seat cushion portion 12 includes a seat cushion frame 30, a seat cushion pad 60 supported by the seat cushion frame 30, and at least an upper surface and a side surface of the seat cushion pad 60. A trim cover (seat cushion skin) 62 is provided. The seat cushion pad 60 includes at least a pad main body 60A, a pad hanging portion 60B, and a rear side portion 60C as a pad non-hanging portion. For the trim cover 62, for example, a cloth material, a vinyl material, a leather material, a synthetic leather material, or the like is used.

  As shown in FIGS. 3 and 8, the pad main body 60 </ b> A is provided in a region overlapping with the seat cushion frame 30 in plan view. The pad hanging portion 60B covers the frame outer wall 32A from the front end portion 32X (see FIG. 2) on the front side of the seat of the side frame 32 and the upper end portion 32H of the intermediate portion 32Y, and is suspended downward from the seat. . The pad hanging part 60B has a function of preventing the pad main body 60A from entering (dropping) into the inside of the side frame 32 due to the pad body 60A sinking downward in the seat downward direction when the passenger sits on the seat cushion part 12. Yes.

  As shown in FIGS. 3, 6, and 8, the rear side portion 60 </ b> C is a portion that is the seat width direction end portion of the seat cushion pad 60 and does not have the pad hanging portion 60 </ b> B on the seat rear end side. In other words, the rear side portion 60 </ b> C has a shape in which a portion of the pad hanging portion 60 </ b> B formed in advance in the entire front-rear direction of the seat cushion pad 60 is cut off. In particular, as shown in FIG. 6, the rear side portion 60 </ b> C is a rear end portion 32 </ b> Z of the side frame 32 on the rear side of the seat, and vertically extends with an upper end portion 32 </ b> H bent inward in the seat width direction of the side frame 32. It arrange | positions so that it may superpose | polymerize. By providing the rear side portion 60C on the seat cushion pad 60, the vehicle seat 10 can be slimmed in the seat width direction. In the present embodiment, the seat cushion pad 60 is formed of, for example, a foamed urethane foam material, a fiber material, or the like having elasticity.

  Although a part of the configuration is omitted, the seat back portion 14, like the seat cushion portion 12, is illustrated as being supported by the seat back frame 42 shown in FIG. 2 and the seat front side of the seat back frame 42. The seat back pad that is omitted, and a trim cover (seat back skin) 64 shown in FIG. 1 that covers at least the upper and side surfaces of the seat back pad are provided.

(Configuration of inner cover)
As shown in FIGS. 3 to 7, in the vehicle seat 10 according to the present embodiment, an inner cover 52 is provided between the upper end portion 32 </ b> H of the side frame 32 and the rear side portion 60 </ b> C of the seat cushion pad 60. ing. The present embodiment is not particularly limited to this configuration, but has a function as a design cover as will be described later. For this reason, the inner cover 52 has a diverging shape (triangular shape) in which the dimension in the seat vertical direction gradually increases from the front end portion 52X on the front side of the seat along the rear end portion 52Z on the rear side of the seat via the intermediate portion 52Y. Shape).

  The front end portion 52X of the inner cover 52 is just disposed between the upper end portion 32H of the side frame 32 and the rear side portion 60C of the seat cushion pad 60. In the present embodiment, the front end portion 52X is formed in an inverted U shape that is open in the sheet lower direction that covers the upper end portion 32H from the upper side of the sheet. Further, at the front end portion 52X, a cover inner wall 52C positioned on the inner side in the sheet width direction extends from the edge 32E of the upper end portion 32H toward the inner side in the sheet width direction and below the sheet. That is, at the front end portion 52X, a cover inner wall 52C that covers at least the edge 32E is required. In the present embodiment, the front end portion 52X includes a cover outer wall 52A provided on the outer side in the seat width direction along the frame outer wall 32A and the frame upper wall 32B from the upper end of the cover outer wall 52A. A cover upper wall 52B provided on the inner side in the seat width direction, and a cover inner wall 52C extending from the inner edge of the cover upper wall 52B in the seat width direction along the frame inner wall 32C toward the seat lower side than the edge 32E. It is configured. A cover inner wall end 52E extending further downward in the seat is provided at the lower end of the cover inner wall 52C, as shown in particular by the solid line in FIGS. The cover inner wall end portion 52E is configured to prevent the side surface 60E of the rear side portion 60C from being caught on the edge 32E even when the rear side portion 60C is deeply sunk downward in the seat. In the present embodiment, as shown by a broken line in FIG. 6, the cover inner wall end 52E is further bent outward in the sheet width direction from the cover inner wall 52C, and covers the edge 32E. preferable.

  A portion of the inner cover 52 extending from the intermediate portion 52Y to the rear end portion 52Z has a main function as a design cover that blinds the inner wall side of the side frame 32 around the reclining device 16. In the intermediate portion 52Y, as particularly shown in FIGS. 4 and 5, the cover upper wall 52D provided along the frame upper wall 32B of the side frame 32, and the seat bottom from the inner edge in the seat width direction of the cover upper wall 52D. A cover inner wall 52F extending in the direction is provided. As shown in FIG. 4 in particular, the rear end 52Z is provided with a cover inner wall 52H that is integrally formed with the cover inner wall 52F and covers the seat rear side along the frame inner wall 32C of the side frame 32. The cover inner walls 52F and 52H have a function as a design cover that blinds the inner wall side of the side frame 32.

  In the present embodiment, the front end portion 52X, the intermediate portion 52Y, and the rear end portion 52Z are integrally formed by, for example, injection molding of a resin material, and the inner cover 52 is one assembly for assembling the vehicle seat 10. It is manufactured as a part. In the present embodiment, the material is not particularly limited, but a resin material such as polypropylene (PP) can be used.

(Operation and effect of the present embodiment)
In the vehicle seat 10 according to the present embodiment, the seat cushion pad 60 is supported by the seat cushion frame 30 having the side frames 32. In particular, as shown in FIG. 6, the rear side portion 60 </ b> C of the seat cushion pad 60 in the seat width direction and on the rear side of the seat is arranged to overlap the upper end portion 32 </ b> H of the side frame 32. .

  Here, the inner cover 52 is provided between the upper end portion 32H of the side frame 32 and the rear side portion (pad non-hanging portion) 60C of the seat cushion pad 60. The inner cover 52 extends from the upper end portion 32H to the inner side in the sheet width direction and to the lower side of the sheet from the upper end portion 32H and the edge 32E. For example, when the occupant stands with his knees and rides on the rear part of the seat cushion pad 60, as shown in FIG. 7, a load F acting locally on the lower side of the seat is generated at the rear part, and the rear side part 60C or its The side portion 60E sinks to the edge 32E of the side frame 32 or below the seat. In FIG. 7, the contour shape of the seat cushion pad 60 before the load F is generated is indicated by a broken line, and the contour shape of the seat cushion pad 60 after the load F is generated is indicated by a solid line. In the inner cover 52, the rear side portion 60C can be moved in the seat vertical direction without contacting the rear side portion 60C and the edge 32E. For this reason, since the catch between the rear side part 60C and the edge 32E is eliminated, the shape of the rear side part 60C can be restored. Further, since the rear side portion 60C can be restored, it is not necessary to support the rear side portion 60C with a wire or the like. For this reason, the elasticity at the rear side portion 60C is not impaired.

  Therefore, according to the vehicle seat 10 according to the present embodiment, it is possible to improve the restoring force against the depression at the rear side portion 60C of the seat cushion pad 60, and to improve the sitting comfort of the passenger. it can.

  Further, in the vehicle seat 10 according to the present embodiment, as shown in FIG. 6 in particular, the inner cover 52 is formed in an inverted U shape that is open in the seat lower direction covering the upper end portion 32H from the seat upper side. ing. Furthermore, the cover inner wall 52C of the inner cover 52 extends from the edge 32E of the upper end portion 32H to the seat lower side. Therefore, the inner cover 52 can be positioned with respect to the side frame 32 in the sheet width direction only by overlapping the inner cover 52 with the upper end portion 32H of the side frame 32.

  Therefore, according to the vehicle seat 10 according to the present embodiment, the work of assembling the inner cover 52 to the side frame 32 can be simplified.

  Furthermore, in the vehicle seat 10 according to the present embodiment, as shown in FIG. 6 in particular, a cover inner wall end 52E is provided at the lower end of the cover inner wall 52C of the inner cover 52. The cover inner wall end 52E is bent outward in the sheet width direction from the cover inner wall 52C, as indicated by a broken line. For this reason, since the edge 32E of the upper end portion 32H of the side frame 32 is covered by the cover inner wall end portion 52E of the inner cover 52, even if the rear portion of the seat cushion pad 60 sinks, the rear side portion 60C becomes the edge 32E. It becomes even more difficult to get caught.

  Therefore, according to the vehicle seat 10 according to the present embodiment, the seat cushion pad 60 is further prevented from being caught by the rear side portion 60C of the seat cushion pad 60 and the edge 32E of the upper end portion 32H of the side frame 32. The restoring force of the rear side portion 60C can be further improved.

  Moreover, according to the vehicle seat 10 according to the present embodiment, since the inner cover 52 is manufactured by molding a resin material, the inner cover 52 does not require mechanical processing such as bending after molding. Therefore, according to the vehicle seat 10 according to the present embodiment, the inner cover 52 can be easily and inexpensively manufactured.

  Furthermore, in the vehicle seat 10 according to the present embodiment, as shown in FIGS. 4 and 5, a design cover (in which the inner cover 52 covers the inner wall side of the intermediate portion 52Y and the rear end portion 52Z of the side frame 32). The cover inner wall 52F and the cover inner wall 52H) are integrally formed. For this reason, the inner cover 52 is configured as one part together with the design cover. Therefore, according to the vehicle seat 10 according to the present embodiment, the number of parts can be reduced.

[Supplementary explanation of the above embodiment]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, an example in which the present invention is applied to a reclining type vehicle seat that can move in the front-rear direction of the seat has been described, but the front-rear direction of the seat cannot be moved or the angle of the seat back portion is fixed. The present invention may be applied to a vehicle seat of the type.

  In the present invention, the inner cover may be made of a metal material such as steel or aluminum, an alloy material such as an aluminum alloy, a carbon fiber material, or the like. Furthermore, in this invention, an inner cover may be comprised only by the front-end part which remove | eliminated the site | part of the design cover of an intermediate part and a rear-end part. In the present invention, the inner cover (particularly the front end portion) may be configured only to correspond to the inner wall of the cover. In this case, when the inner cover and the side frame are made of, for example, a steel plate, the inner cover is fixed to the side frame by welding. The inner cover may be fixed to the side frame with screws or clips. Further, in the inner cover made of a resin material, an engaging portion such as a claw may be integrally manufactured, and the inner cover may be attached to the side frame via the claw.

  Further, in the above embodiment, the rear side portion (pad non-hanging portion) is provided at both ends of the seat cushion pad, and the inner cover is provided on both sides corresponding to the rear side portion. The inner cover may be provided in either one. For example, in a vehicle seat used as a driver seat of a right-hand drive vehicle, the right side end portion of the seat cushion pad and the rear side portion on the rear side of the seat are viewed from the driver seated in the vehicle seat. The pad may be a non-hanging portion, and an inner cover may be provided at this portion. That is, the pad hanging portion is provided on the left side of the rear side portion of the seat cushion pad, and the inner cover is not provided at this portion. The arrangement of the inner cover is reversed in a vehicle seat used as a passenger seat.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 12 Seat cushion part 30 Seat cushion frame 32 Side frame 32E Edge 32H Upper end part 52 Inner cover 52A Cover outer wall 52B Cover upper wall 52C Cover inner wall 52E Cover inner wall edge part 60 Seat cushion pad 60B Pad hanging part 60C Back side part (Non-padded part)

Claims (6)

A seat cushion frame having a side frame which is provided along the seat front-rear direction on the seat lower side of the seat width direction end portion of the seat cushion portion and whose upper end portion is bent inward in the seat width direction;
A seat cushion pad supported by the seat cushion frame and disposed so that the rear side portion on the seat rear side in the seat width direction overlaps the upper end portion;
A cover inner wall is formed between the upper end portion and the rear side portion, which is formed in an inverted U shape that opens in the seat lower direction and covers the upper end portion from the upper side of the seat. an inner cover which extends into the sheet over preparative lower side than the edge which is located in the seat width direction inside of the upper end portion,
Vehicle seat equipped with The inner cover for a vehicle seat according to claim 1 which before along asked bar inner wall is set to allow movement of the seat up-down direction of the rear side.   The vehicle seat according to claim 2, wherein a cover inner wall end portion that is bent outward in the seat width direction from the cover inner wall is provided at a lower end of the cover inner wall.   The vehicle seat according to any one of claims 1 to 3, wherein the inner cover is manufactured by molding a resin material.   The vehicle seat according to any one of claims 1 to 4, wherein the inner cover is formed integrally with a design cover that covers an inner wall of the side frame on the seat rear side.   A seat cushion frame having a side frame which is provided along the seat front-rear direction on the seat lower side of the seat width direction end portion of the seat cushion portion and whose upper end portion is bent inward in the seat width direction;
  A pad hanging portion that is supported by the seat cushion frame and covers an outer wall of the side frame from a front end portion and an intermediate portion on the seat front side of the upper end portion and is hung down to the seat lower side at the seat width direction end portion. A seat cushion pad disposed so that a rear side portion of the seat rear side not having the pad hanging portion overlaps the upper end portion;
  An inner cover provided between the upper end portion and the rear side portion, and extending from the upper end portion toward the seat width direction inner side and the seat lower side;
  Vehicle seat equipped with

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