JP2015096403A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat securing holding properties in a seat width direction for the upper body of a seating occupant on a side support regardless of the physical size of the occupant.SOLUTION: A side support 20 swells out to the front side of a seat by activating a bladder 42. An edge part 20A of the side support 20 swells out to the inside in a seat width direction by activating a bladder 44 in a condition where the side support 20 swells out to the seat front side. The edge parts of elastic embers 48, 50 causing elastic deformation are held on a side surface skin 32 of the side support 20, and displacement of the inside part in the seat width direction of the side surface skin 32 and displacement of the outside part in the seat width direction are allowed. Accordingly, the side support can be closely attached to the upper body of a seating occupant Q, and as a result, the holding properties in the seat width direction to the upper body of the seating occupant on the side support can be secured.

Description

  The present invention relates to a vehicle seat.

  In the vehicle seat device described in the following Patent Document 1, a side pad that constitutes a side support can be displaced by inflating a bag provided inside the side support. Thereby, the position of the side pad can be adjusted according to the physique of the seated occupant, and the holdability for the upper body of the seated occupant can be improved. In addition, a part of the skin of the side pad can be expanded and contracted, and the resistance received by the side pad when the position of the side pad is adjusted can be reduced.

JP 2010-279488 A (FIG. 4)

  However, in the vehicle seat device disclosed in Patent Document 1, the displacement direction of the side pad is set to the front side of the seat. In the vehicle seat device, the outer side portion of the side pad in the seat width direction can be expanded and contracted, but the inner side in the seat width direction of the outer skin, that is, the seated occupant side portion, is not extendable. For this reason, the side pad cannot be sufficiently displaced inward in the seat width direction, and as a result, depending on the size of the seated occupant, sufficient holdability in the seat width direction with respect to the upper body of the seat occupant of the side support must be ensured. May be difficult.

  In view of the above facts, an object of the present invention is to provide a vehicle seat that can secure the holdability in the seat width direction with respect to the upper body of the seated occupant of the side support regardless of the size of the seated occupant.

  The vehicle seat according to the first aspect of the present invention includes a seat back frame that constitutes a skeleton of the seat back, and ends on the inner side in the seat width direction on both sides in the seat width direction of the backrest of the seat back. A side support provided in a separated state; a side skin covering the front side of the seat of the side support; a fixing plate provided inside the side support and fixed to the seat back frame; and the fixing plate to the fixing plate A movable plate pivotally supported around the inner side in the sheet width direction, and provided between the fixed plate and the movable plate. The movable plate and the fixed plate are rotated by rotating the movable plate. The side support is expanded to the front side of the seat by separating Provided between the first actuator, the side support and the movable plate, and in the state where the side support bulges to the front side of the seat, the end of the side support in the seat width direction is bulged inward in the seat width direction. A second actuator, a first elastic member having an end portion locked to an inner portion in the seat width direction of the side skin and elastically deforming to permit displacement of an end portion in the seat width direction of the side support; and the side And a second elastic member having an end portion locked to an outer portion in the seat width direction of the skin and elastically deforming to allow displacement of the end portion on the outer side in the seat width direction of the side support.

  According to the first aspect of the present invention, the seat back having the side supports provided on both sides in the seat width direction of the backrest is provided, and the upper body of the seated occupant can be supported. Further, a fixing plate is provided inside the side support, and the fixing plate is fixed to a seat back frame constituting a skeleton of the seat back. A movable plate is pivotally supported on the fixed plate so as to be rotatable about the inner side in the sheet width direction of the fixed plate. Further, a first actuator is provided between the fixed plate and the movable plate. For this reason, by operating the first actuator, the movable plate can be rotated to separate the movable plate and the fixed plate. As a result, the side support is bulged (protruded) to the front side of the seat. )be able to. Therefore, in the present invention, when the holdability for the upper body of the seated occupant is not sufficiently ensured, the holdability for the upper body of the seated occupant can be improved by the side support.

  Here, in the present invention, depending on the physique of the seated occupant, the side support may not be sufficiently brought into close contact with the upper body of the seated occupant simply by bulging the side support forward of the seat. In this case, the holdability in the seat width direction with respect to the upper body of the seat occupant of the side support becomes insufficient.

  However, in the present invention, the end portion of the side support in the seat width direction is separated from the backrest, and the second actuator is provided between the side support and the movable plate. For this reason, in the state where the side support bulges to the front side of the seat, by operating the second actuator, the end portion of the side support in the seat width direction can be bulged (swelled out) in the seat width direction. . Furthermore, the end portion of the first elastic member that is elastically deformed is locked to the inner side portion of the side skin covering the front side of the side support, and the outer side portion of the side skin is elastic to the outer side portion of the side skin. The edge part of the 2nd elastic member to deform | transform is latched. For this reason, the displacement of the end portion of the side support in the seat width direction is allowed by the first elastic member, and the displacement of the end portion of the side support in the seat width direction is allowed by the second elastic member. Therefore, in the present invention, the end portion of the side support in the seat width direction can be swelled inward in the seat width direction, and as a result, the end portion of the side support in the seat width direction is brought into close contact with the upper body of the seated occupant Can do.

  As described above, in the vehicle seat according to the first aspect of the present invention, the holdability in the seat width direction with respect to the upper body of the seat occupant of the side support can be ensured regardless of the physique of the seat occupant. Has an excellent effect.

It is an expanded sectional view (enlarged sectional view showing the state where it cut along line 1-1 of Drawing 3) showing the important section of the vehicular seat concerning this embodiment. (A) is an enlarged sectional view showing a main part in a state where only the first actuator is operated in the vehicle seat shown in FIG. 1, and (B) is the first actuator in the vehicle seat shown in FIG. FIG. 6 is an enlarged cross-sectional view showing a main part in a state where the second actuator is activated. It is the perspective view seen from the seat left diagonal front which shows the whole vehicle seat concerning this embodiment.

  Hereinafter, an embodiment of a vehicle seat according to the present invention will be described with reference to FIGS. Note that an arrow FR appropriately shown in the drawings indicates the front of the seat, an arrow UP indicates the upper portion of the seat, and an arrow LH indicates the left side of the seat. The front of the seat, the upper part of the seat, and the left side of the seat correspond to the front of the vehicle, the upper side of the vehicle, and the left side of the vehicle, respectively.

  First, an example of the configuration of the vehicle seat 10 according to the present embodiment will be described. As shown in FIG. 3, the vehicle seat 10 is a front seat mounted on the vehicle front side in the vehicle interior of the vehicle. The vehicle seat 10 includes a seat cushion 12 that supports the buttocks of a seated occupant, and a seat back 14 having a lower end connected to a seat rear side end of the seat cushion 12. The seat back 14 is disposed in a standing state with respect to the seat cushion 12, and the seat back 14 is connected to the seat cushion 12 so as to be tiltable. A headrest 16 is provided on the seatback 14 above the seat, and the headrest 16 is supported by the seatback 14. Thus, the upper body of the seated occupant is supported by the seat back 14 and the head of the seated occupant is supported by the headrest 16.

  As shown in FIG. 1, the seat back 14 includes a backrest 18 that supports the upper body of the seated occupant from behind the seat, a pair of left and right side supports 20 that support the upper body of the seated occupant from the side, a seatback frame 22, And a backboard 24. Although only the left side portion of the seat back 14 is illustrated in FIG. 1, the seat back 14 is basically configured symmetrically.

  The backrest 18 includes a main pad 26 formed in a rectangular parallelepiped shape using a foam material such as urethane, and a main skin 28 that covers the seat front side, the seat vertical direction both sides, and the seat width direction both sides of the main pad 26. It consists of

  The side support 20 is provided on both sides of the backrest 18 in the seat width direction with the end portions 20 </ b> A on the inner side in the seat width direction being separated from the backrest 18. In other words, the side support 20 and the backrest 18 are configured separately. The side support 20 includes a side pad 30 and a side skin 32 and has a shape protruding to the front side of the seat. The side pad 30 is made of a foam material such as urethane, and is formed in a columnar shape having a V shape opened to the rear side of the seat in a cross sectional view. Specifically, the seat width direction outer side surface 30A of the side pad 30 is formed along the seat front-rear direction in a cross-sectional view. Further, the inner side surface 30B of the side pad 30 in the seat width direction is inclined toward the seat width direction inner side and the seat rear side from the seat width direction outer side and the seat front side in a cross-sectional view, and is curved at the seat front side end. Thus, the side pad 30 is connected to the outer side surface 30 </ b> A in the sheet width direction. Further, a groove portion 34 is formed on the side pad 30 on the seat rear side, and the groove portion 34 is opened to the seat rear side in a cross-sectional view. The surface on the inner side in the seat width direction of the groove 34 is inclined from the outer side in the seat width direction and the front side of the seat toward the inner side in the seat width direction and the rear side of the seat in a cross sectional view (hereinafter, this surface is referred to as “inclined surface 34A”). "). And the sheet width direction inner side surface 30B and the sheet width direction outer side surface 30A of the side pad 30 are covered by the side skin 32, and the sheet width direction outer side surface 30A is in contact with the backboard 24 via the side skin 32. It is said that. In other words, the end 20B on the outer side in the seat width direction of the side support 20 is in contact with the backboard 24. Further, the terminal portion 32A on the inner side in the seat width direction of the side skin 32 is connected to the seat back frame 22 via an elastic member 48 as a first elastic member to be described later, and is brought into contact with the main skin 28. Yes. Note that the terminal portion 32 </ b> A is in contact with the main skin 28, but is movable relative to the main skin 28. On the other hand, the terminal portion 32B on the outer side in the seat width direction of the side skin 32 is connected to the backboard 24 via an elastic member 50 as a second elastic member described later. The main skin 28 and the side skin 32 are formed of fabric, leather, synthetic leather, or the like.

  The seat back frame 22 is disposed on the seat rear side of the main pad 26 and the side pad 30 inside the seat back 14 and constitutes a skeleton of the seat back 14. On both sides of the seat back frame 22 in the seat width direction, side frames 36 are provided that are formed by a bent plate material extending in the seat vertical direction. Specifically, the side frame 36 includes a front surface portion 36A facing the front side of the seat, a side surface portion 36B facing the outer side in the seat width direction, and a back surface portion 36C facing the rear side of the seat. It is set to have a trapezoidal frame shape opened to the inside in the sheet width direction as viewed. The front surface portion 36A of the side frame 36 supports the side pad 30 via a side support adjusting mechanism 46 described later.

  The backboard 24 includes a rear wall portion 24A that forms the rear side of the seat and a side wall portion 24B that forms the outer side in the seat width direction. The backboard 24 extends in the vertical direction of the seat and is the front side of the seat in a cross-sectional view. It is formed to be a U-shape that is open to the top. The back board 24 is disposed on the seat rear side of the seat back frame 22 and covers and hides the seat rear side of the seat back 14.

  Here, in the present embodiment, as an example, the side support adjusting mechanism 46 includes a resin fixed plate 38, a resin movable plate 40, a bladder 42 as a first actuator, and a bladder 44 as a second actuator. ing. As described above, the terminal portion 32A of the side skin 32 is fixed to the seat back frame 22 by the elastic member 48 as the first elastic member. Furthermore, the terminal portion 32 </ b> B of the side skin 32 is fixed to the backboard 24 by an elastic member 50 as a second elastic member. Hereinafter, the structures of the side support adjusting mechanism 46, the elastic member 48, and the elastic member 50, which are the main parts of the present invention, will be described in detail.

  First, the configuration of the side support adjusting mechanism 46 will be described. As shown in FIGS. 1 and 2, the fixing plate 38 includes a main body portion 38A formed in a rectangular plate shape in which the vertical direction of the seat is a longitudinal direction, and a pair of bearing portions 38B provided in the main body portion 38A. And is composed of. The bearing portion 38B is erected toward the seat front side at the inner end portion in the seat width direction of the main body portion 38A and at both end portions in the seat vertical direction, and includes a through hole 38C. The fixing plate 38 is fixed to the front surface portion 36A of the side frame portion 36 by a fixing means such as a screw (not shown) in a state where the main body portion 38A extends a predetermined length outward in the seat width direction.

  The movable plate 40 has a main body portion 40A formed in a rectangular plate shape whose longitudinal direction is the vertical direction of the sheet, and is provided on the inner side in the sheet width direction of the main body portion 40A and at both ends in the vertical direction of the sheet. It is comprised by the column-shaped axial part 40B made into the axial direction. The movable plate 40 is pivotally supported so as to be relatively rotatable around the shaft portion 40B with respect to the fixed plate 38 by inserting the shaft portion 40B of the movable plate 40 into the through hole 38C of the fixed plate 38. Yes. Hereinafter, the direction in which the movable plate 40 moves away from the fixed plate 38 (the direction of arrow A in FIG. 2A) when the movable plate 40 rotates with respect to the fixed plate 38 is referred to as an opening direction. The direction in which the movable plate 40 approaches the fixed plate 38 (the arrow B direction in FIG. 2A) is referred to as the closing direction.

  As an example, the bladder 42 is formed in a bag shape by welding the peripheral portions of two cloths, and is disposed between the fixed plate 38 and the movable plate 40. The bladder 42 is set to expand when compressed air is supplied into the bladder 42. Note that the bladder 42 is in contact with or fixed to the fixed plate 38 and the movable plate 40, and the shape of the bladder 42 at the time of expansion is set to be an isosceles triangle in a cross-sectional view. On the other hand, the bladder 44 is in contact with or fixed to the movable plate 40 and the inclined surface 34 </ b> A of the side pad 30. In other words, the bladder 42 is provided on the surface of the movable plate 40 on the fixed plate 38 side, and the bladder 44 is provided on the surface of the movable plate 40 on the side pad 30 side. The bladder 44 is basically configured in the same manner as the bladder 42, but the shape of the bladder 44 at the time of expansion is set to be elliptical when viewed in cross section. FIG. 1 shows a state in which a predetermined amount of compressed air is supplied to the bladders 42 and 44 so that the configuration of the side support adjusting mechanism 46 can be easily understood.

  In addition, an air pump (not shown) is connected to the bladders 42 and 44 via an air tube (not shown) so that compressed air can be supplied into the bladders 42 and 44. The air tube is provided with a valve (not shown), and the opening degree of the valve can be controlled by a control means (not shown) mounted on the vehicle. For this reason, it is possible to independently adjust the amount of compressed air supplied to the bladders 42 and 44.

  In the side support adjusting mechanism 46 configured as described above, the movable plate 40 is set to be pressed by the bladder 42 when compressed air is supplied into the bladder 42. As a result, the movable plate 40 is rotated in the opening direction side, and the side support 20 is bulged (protruded) to the front side of the seat (the state shown in FIG. 2A). The state is referred to as “first operating state”). Further, when compressed air is supplied into the bladder 44, the inclined surface 34 </ b> A of the side pad 30 is set to be pressed by the bladder 44. Accordingly, when compressed air is supplied into the bladder 44 in the first operating state, the movable plate 40 and the inclined surface 34A are separated from each other, and the end portion 20A of the side support 20 is located on the inner side in the seat width direction (seat occupant side). It is designed to bulge out. In other words, the end 20A of the side support 20 is brought close to the upper body of the seated occupant. On the other hand, when the compressed air is supplied into the bladder 44, the end portion 20B of the side support 20 bulges to the front side of the seat (the state shown in FIG. 2B). The state is referred to as “second operating state”). In the second operating state, when the compressed air in the bladder 44 is discharged, the bladder 44 is crushed and the movable plate 40 and the inclined surface 34A approach each other. As a result, the end portion 20A of the side support 20 contracts outward in the seat width direction, and the end portion 20B of the side support 20 contracts toward the seat rear side. Further, when the compressed air in the bladder 42 is discharged, the bladder 42 is crushed, the movable plate 40 is rotated in the closing direction, and the side support 20 contracts toward the seat rear side. When the compressed air is not supplied to the bladders 42 and 44, that is, when the bladders 42 and 44 are crushed, the side support adjusting mechanism 46 is housed in the groove 34 of the side pad 30 (hereinafter, this state is referred to as “ Referred to as “inoperative”). In this embodiment, a bladder is used as the actuator of the side support adjusting mechanism 46, but a driving mechanism such as a motor and a gear may be used. Further, it is not always necessary to provide two actuators on both sides in the seat width direction, and it is sufficient that an actuator for bulging at least the end portion 20A of the side support 20 to the inside in the seat width direction (seat occupant side) is provided.

  Next, the configuration of the elastic member 48 as the first elastic member and the elastic member 50 as the second elastic member will be described. The elastic member 48 is formed in a band shape or a sheet shape by an elastic member such as rubber, and one end thereof is connected to the terminal portion 32A of the side skin 32 by sewing or the like. On the other hand, on the inner side in the seat width direction of the back surface portion 36C of the side frame 36, a terminal portion 36D extends from the outer side in the seat width direction and from the rear side of the seat toward the inner side in the seat width direction and toward the front side of the seat. Is engaged with the terminal portion 36D. The other end of the elastic member 48 may be locked to the locking portion by providing the backboard 24 with a locking portion. The elastic member 48 is set so that sufficient slack is secured in the non-operating state, and slack is eliminated in the second operating state and tension is applied to the terminal portion 32A of the side skin 32. Yes.

  Similarly to the elastic member 48, the elastic member 50 is also formed in a band shape or a sheet shape by an elastic member such as rubber, and one end portion thereof is connected to the terminal portion 32B of the side skin 32 by sewing or the like. On the other hand, a locking portion 52 is provided on the seat rear side of the inner surface of the side wall portion 24 </ b> B of the backboard 24. The engaging portion 52 includes a flange portion 52A formed in a rectangular plate shape and a shaft portion 52B, and extends from the seat width direction outer side and the seat rear side to the seat width direction inner side and the seat front side. It is erected. The other end portion of the elastic member 50 is locked to the locking portion 52. Note that the other end of the elastic member 50 may be locked to the seat back frame 22. Further, the elastic member 50 is set such that sufficient slack is ensured in the non-operating state, and slack is eliminated in the second operating state, and tension is applied to the terminal portion 32B of the side skin 32. Yes.

  Next, functions and effects of this embodiment will be described.

  In the present embodiment, as shown in FIG. 1, the seat back 14 provided with the side supports 20 on both sides in the seat width direction is provided, and the upper body of the seated occupant P indicated by the solid line can be supported. Further, a fixed plate 38 is provided inside the side support 20, and a movable plate 40 is rotatably supported by a bearing portion 38 </ b> B provided at an inner end in the seat width direction of the fixed plate 38. Yes. Further, a bladder 42 is provided between the fixed plate 38 and the movable plate 40. For this reason, by operating the bladder 42, the movable plate 40 can be rotated to separate the movable plate 40 and the fixed plate 38, and as a result, the side support 20 can be expanded to the front side of the seat. .

  Specifically, referring to FIG. 2 (A), when the seated occupant P is seated on the vehicle seat 10, if the holdability for the upper body of the seated occupant P is not sufficiently secured, the air pump is operated. The compressed air is supplied to the bladder 42. Thereby, the bladder 42 expand | swells, the movable plate 40 is pressed by the bladder 42, and the said movable plate 40 rotates to the opening direction side. As a result, the side support 20 bulges to the front side of the seat and enters the first operating state, whereby the holdability of the seated occupant P with respect to the upper body can be improved.

  By the way, as shown by the phantom lines, when a seated occupant Q having a smaller physique than the seated occupant P is seated on the vehicle seat 10, the side support 20 is simply bulged toward the front of the seat. Q may not be able to sufficiently adhere to the upper body. In this case, the holdability in the seat width direction with respect to the upper body of the seated occupant Q of the side support 20 becomes insufficient.

  Here, in the present embodiment, the end 20 </ b> A on the inner side in the seat width direction of the side support 20 is separated from the backrest 18, and the bladder 44 is provided between the side support 20 and the movable plate 40. Yes. For this reason, the end part 20A of the side support 20 can be bulged inward in the seat width direction by operating the bladder 44 in a state where the side support 20 bulges to the front side of the seat. Furthermore, the end portion of the elastic member 48 that is elastically deformed is engaged with the terminal portion 32A of the side skin 32 that covers the seat front side of the side support 20, and the terminal portion 32B of the side skin 32 is elastically deformed. The end of the elastic member 50 is locked. Therefore, the displacement of the side skin 32 in the sheet width direction is allowed by the elastic member 48, and the displacement of the side skin 32 in the sheet width direction outside is allowed by the elastic member 50.

  Specifically, referring to FIG. 2B, when the side support 20 cannot be sufficiently adhered to the upper body of the seated occupant Q in the first operating state, the air pump is operated and compressed air is supplied to the bladder 44. Supply. As a result, the bladder 44 expands and the inclined surface 34 </ b> A of the side pad 30 is pressed by the bladder 44. As a result, the end portion 20A of the side support 20 bulges inward in the seat width direction, and the end portion 20B of the side support 20 bulges to the front side of the seat, resulting in the second operating state. In other words, the inner side portion of the side support 20 in the seat width direction approaches the upper body of the seated occupant Q. At this time, as the end portion 20A of the side support 20 bulges inward in the seat width direction, the elastic member 48 is pulled through the end portion 32A of the side skin 32 and extends while the slack is eliminated. On the other hand, as the end portion 20B of the side support 20 bulges toward the front side of the seat, the elastic member 50 is pulled through the end portion 32B of the side skin 32 and extends while the slack is eliminated. For this reason, it can suppress or prevent that the bulging of the edge parts 20A and 20B of the side support 20 is inhibited, and as a result, the edge part 20A of the side support 20 can be bulged inward in the seat width direction. In the present embodiment, the elastic members 48 and 50 are provided on the side skin 32, but the bulging of the end portion 20A of the side support 20 is inhibited even when only the elastic member 48 is provided on the side skin 32. This can be suppressed or prevented. Further, even when the elastic members 48 and 50 are connected or the elastic members 48 and 50 are configured as a single member, the bulging of the end portions 20A and 20B of the side support 20 is inhibited. Or it can be prevented.

  As described above, in the present embodiment, the end 20A of the side support 20 is separated from the backrest 18, and the side support adjusting mechanism 46 and the side including the fixed plate 38, the movable plate 40, the bladder 42, and the bladder 44 are included. An elastic member 48 and an elastic member 50 provided on the skin 32 are provided. For this reason, the side support can be brought into close contact with the upper body of the seated occupants P and Q, and as a result, it is possible to ensure the holdability in the seat width direction with respect to the upper body of the seated occupant of the side support. it can.

  In the present embodiment, the elastic member 48 and the elastic member 50 are formed of elastic members. Thereby, in the state in which the slack of the elastic member 48 and the elastic member 50 is eliminated, the tension toward the seat rear side is applied to the inner side in the seat width direction and the outer side in the seat width direction of the side support 20. As a result, the generation of wrinkles on the side skin 32 due to the displacement of the side support 20 can be suppressed or prevented.

  In the present embodiment, the side support adjustment mechanism 46 is applied to the side support 20 of the seat back 14, but may be applied to the side support of the seat cushion 12.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 14 Seat back 20 Side support 20A End part (end part inside seat width direction)
20B end (end of sheet width direction outside)
22 Seat back frame 32 Side skin 38 Fixed plate 40 Movable plate 42 Bladder (first actuator)
44 Bladder (second actuator)
48 Elastic member (first elastic member)
50 Elastic member (second elastic member)

Claims (1)

A seat back frame constituting the skeleton of the seat back;
Side support provided in a state in which the end portion on the inner side in the seat width direction is separated from the backrest on both sides in the seat width direction in the backrest of the seat back,
A side skin covering the seat front side of the side support;
A fixing plate provided inside the side support and fixed to the seat back frame;
A movable plate that is pivotally supported by the fixed plate so as to be rotatable around an inner portion in the sheet width direction of the fixed plate;
A first actuator that is provided between the fixed plate and the movable plate, and rotates the movable plate to separate the movable plate and the fixed plate;
A second actuator provided between the side support and the movable plate, and in a state in which the side support bulges to the front side of the seat, a second actuator that bulges the end portion on the inner side in the seat width direction of the side support;
A first elastic member that allows a displacement of an inner edge portion of the side support in the side support by being elastically deformed by an end portion being locked to the inner side portion of the side skin.
A second elastic member that allows a displacement of an outer end portion of the side support in the side width direction by being elastically deformed by an end portion being locked to an outer portion in the seat width direction of the side skin;
A vehicle seat having:

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