JP2017210126A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out necessary reinforcement while controlling the bending moment resulting from the load from the seat belt of a seat back in a vehicle seat having a fixed seat belt and equipped with a forward-collapsible seat back, and further to achieve downsizing of the reinforced seat back by holding off the reinforcement member from a pad position for securing comfortable ride.SOLUTION: In an objective vehicle seat, a lock mechanism 15 is fixed below the side of a fixed position of the retractor 14 for seat belt in a panel frame 10 configuring the structural member of a seat back. The beads 11 are provided on the panel frame 10 extending in a vertical direction. Further in the upper part of the panel frame 10, the beads 11 are provided along the direction connecting the fixed positions of the retractor 14 and lock mechanism 15. Besides, the beads 11 are not provided at the sites corresponding to the back and hip of an occupant, but are provided at the sites separating from the specific sites.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a passenger seat for mounting on a vehicle such as an automobile, an airplane, a ship, and a train.

  In vehicles, miniaturization and weight reduction are demanded as social needs. The same applies to the rear seat of the sedan type vehicle. There is a rear seat of a sedan type vehicle in which an end portion of a seat belt is fixed to a seat back (see Patent Document 1).

JP 2006-247066 A

  In the case of the rear seat having such a structure, the seat back receives a load applied to the seat belt at the time of a vehicle collision, so that the seat back must be reinforced. In particular, when the seat back can be moved forward and the locking mechanism of the seat back with respect to the vehicle body is separated from the seat belt fixing position, a load is applied from the seat belt with the seat back locked. And the bending moment with respect to the seat back accompanying the load becomes large, and a stronger reinforcement is required. For this reason, the seat back is increased in size and weight and cannot meet social needs.

  In view of such a problem, an object of the present invention is to perform necessary reinforcement while controlling a bending moment due to a load from a seat belt of a seat back in a seat having a seat back to which a seat belt is fixed and can be moved forward. At the same time, it is to reduce the size of the reinforced seat back by moving the reinforcing member away from the pad position for ensuring riding comfort.

  A first invention is a panel frame made of a plate material that forms a structural member of a seat back that is a backrest, a belt fixing member that is fixed to an upper portion of the panel frame and fixes an end of a seat belt for restraining passengers, and the panel A vehicle seat comprising a lock mechanism that is fixed to a frame and that selectively fixes a seat back to and from a vehicle body, and a bead that is provided on the surface of the panel frame and increases the bending rigidity of the panel frame. The fixing position of the locking mechanism is set to the lower side with respect to the fixing position of the belt fixing member, and the bead is provided to extend in the vertical direction, and at the upper part of the panel frame, the fixing position of the belt fixing member is It is provided along the direction connecting the fixed position of the lock mechanism. Furthermore, the bead is not provided in a specific part important for ensuring riding comfort, but is provided in a part separated from the specific part.

  In the first invention, the fixing position of the locking mechanism relative to the fixing position of the belt fixing member may be provided on either side of the seat back in the width direction. The number of beads may be singular or plural.

  When the seat belt receives a load accompanying a vehicle collision, the panel frame receives a bending moment from the fixed position of the lock mechanism as a result of the load. According to the first invention, the bead is provided along a direction connecting the fixing position of the belt fixing member and the fixing position of the lock mechanism. Therefore, the bending rigidity of the panel frame can be increased by the bead with respect to the bending moment. In addition, the bead is provided away from a specific part that is important for ensuring the ride comfort. Therefore, it does not give occupants a sense of foreign matter due to beads at specific parts that are important to ensure riding comfort, avoids the thickening of the pad required when such foreign matter occurs, and provides good riding comfort All of the reinforcement of the panel frame and the thinning of the seat back can be realized.

  In a second aspect based on the first aspect, specific parts important for ensuring the riding comfort are parts corresponding to the waist and back of the seated occupant.

  On the seating surface of the seat back, the parts corresponding to the waist and back of the seated occupant are pushed more strongly than the other parts. According to the second invention, no bead is provided at this portion. Therefore, it is possible to ensure a good riding comfort without giving a foreign body feeling due to the beads to the waist and back of the seated occupant and without particularly increasing the thickness of the pad with respect to other parts.

  According to a third invention, in the first or second invention, the seat back includes an armrest that is embedded and stored inside the seat back when not in use and is moved to a use position on the surface of the seat back when in use. The armrest is provided corresponding to a portion where the bead is provided. The lock mechanism is provided corresponding to the upper part of the armrest.

  When the armrest is unused and the occupant is seated, the occupant may be seated at a position corresponding to the stored armrest. According to the third invention, the armrest is provided corresponding to the portion where the bead is provided. Therefore, an armrest is interposed between the seated occupant and the bead, and a good ride comfort can be ensured without giving a foreign body feeling due to the bead to the waist and back of the seated occupant. The lock mechanism is provided corresponding to the upper part of the armrest. The upper part of the armrest is a part that hardly affects the ride comfort of the seated occupant. For this reason, the lock mechanism does not give the seated occupant a foreign object feeling.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, a portion corresponding to the belt fixing member and the locking mechanism is a closed cross-sectional structure at an upper portion of the panel frame. The closed cross-sectional space is formed to extend in the width direction of the seat back.

  According to the 4th invention, the site | part corresponding to the belt fixing member and locking mechanism of a panel frame is made into the closed cross-section structure. Therefore, the panel frame is reinforced by the bead and the closed cross-sectional structure against the bending moment of the panel frame due to the vehicle collision.

  According to a fifth invention, in any one of the first to fourth inventions, on the seating surface side of the panel frame, a pad for securing riding comfort and a skin for fixing the pad to the panel frame are sequentially provided. It is covered in layers. At least a central portion of the panel frame on the side opposite to the seating surface is provided with a concavo-convex pattern having a plurality of protrusions that is not covered with the pad and the skin.

  According to the fifth aspect of the present invention, the pad and the skin are not covered on at least the central portion of the panel frame on the side opposite to the seating surface. Therefore, the seat back can be made thinner by the amount that there is no pad and skin. Moreover, an uneven pattern is provided on the side of the panel frame opposite to the seating surface. Therefore, the surface rigidity of the panel frame can be increased. Further, when the seat back is brought forward, deterioration of appearance due to the pad and the skin not being covered can be suppressed. Furthermore, when the luggage is moved on the anti-sitting surface side of the seat back that is brought forward, the contact area between the anti-seating surface side of the seat back and the luggage is reduced by the uneven pattern. Therefore, the frictional resistance is suppressed, and the movement of the load can be facilitated.

It is a front view of one embodiment of the present invention. FIG. 2 is a front view similar to FIG. 1, showing a state in which a part of the seat back is tilted forward. It is a partial cross section side view of the said embodiment. It is a partially broken front view of a part of panel frame in the above-mentioned embodiment. It is a partial fracture perspective view of a part of seat back in the above-mentioned embodiment. It is the VI-VI sectional view arrow enlarged view of FIG. It is a partially broken rear perspective view of the seat back of the embodiment. It is the VIII-VIII line cross-sectional enlarged view of FIG.

  Each figure shows an embodiment of the present invention. This embodiment shows an example in which the present invention is applied to a three-seat rear seat (hereinafter simply referred to as a seat) of a sedan type automobile. In each figure, the direction of each part in the state which mounted the sheet | seat in the motor vehicle by the arrow is shown. In the following description, the description regarding the direction is made based on this direction.

  As shown in FIGS. 1 to 3, the rear seat includes a seat back 1 that forms a backrest and a seat cushion 2 that forms a seat. Both the seat back 1 and the seat cushion 2 are fixed to the vehicle body of the automobile. The seat back 1 is a division type divided in a ratio of 6 to 4 in the width (left and right) direction, the right side is 6 side (referred to as the large side) 1R, and the left side is defined as the 4 side (referred to as the small side) 1L. ing. The seat back 1 can be moved forward independently, except for both sides in the width direction. FIG. 2 shows a state in which the large-side seat back 1R is tilted forward. FIG. 3 shows a state in which the large seat back 1R is tilted forward from the normal seating position as indicated by an arrow. In a state in which the seat back 1 is moved forward, the trunk room 33 and the vehicle interior are connected, and the trunk room floor 32 of the trunk room 33 and the back surface of the seat back 1 have substantially the same height, and are long over both spaces. Luggage can be loaded.

  The lock mechanism 15 for fixing the large-side seat back 1 </ b> R to the normal seating position is provided between the upper portion of the large-side seat back 1 </ b> R and the upper back 31 constituting the upper surface wall of the trunk room 33. . The lock mechanism 15 is a known mechanism and includes a latch mechanism 15a and a striker 15b. The latch mechanism 15a is fixed to the upper portion of the large seat back 1R, and the striker 15b is fixed to the upper back 31. Although not shown, a similar locking mechanism is provided between the upper back 31 and the seat back 1L on the small side.

  The large-side seat back 1R is equipped with two headrests 3, and the small-side seat back 1L is equipped with one headrest 3. An armrest 5 is provided below the left headrest 3 in the large seat back 1R. The armrest 5 is embedded and stored inside the large seat back 1R when not in use, and is moved to a use position on the surface of the large seat back 1R when in use.

  The seat back 1 is equipped with three seat belts 4 in the width direction, and can restrain three seated passengers at the time of a collision. The seat belts 4 arranged on both sides are provided corresponding to both sides of the seat back 1, and the seat belt 4 arranged in the center corresponds to the space between the two headrests 3 in the large seat back 1R. Equipped. Each seat belt 4 has a lower end fixed to the vehicle body and an upper end wound around a retractor (corresponding to a belt fixing member of the present invention) 14. The retractors (not shown) of the seat belts 4 arranged on both sides are fixed to the vehicle body, and the retractors 14 of the seat belt 4 arranged in the center are fixed to the upper part of the large seat back 1R (FIG. 4 to FIG. 4). 6). Although not shown, a tongue plate is inserted through each seat belt 4, and the occupant can be restrained by engaging the tongue plate with a belt anchor fixed to the vehicle body.

  4 to 6 show the internal structure of the large seat back 1R. The large seat back 1R includes a panel frame 10 made of an aluminum plate as a structural member. Around the panel frame 10, a bead 12 protruding in the front side is formed in an annular shape. Further, three beads 11 are formed to protrude from the front side of the panel frame 10 so as to connect the upper side and the lower side of the annular bead 12. These beads 11 and 12 are formed by press molding. Each bead 11 extends along the vertical direction at a height of about one third from the bottom, and the upper side is bent and inclined to the right. The inclination angle is slightly changed for each bead 11, and the inclination angle is increased toward the right side. By forming the plurality of beads 11 and 12 in this way, the panel frame 10 has increased bending rigidity.

  On the front side of the panel frame 10 and above the beads 11, 12, a closed cross-section structure is formed by a closed cross-section structure member 17. In FIG. 4, the illustration of the closed cross-section structural member 17 is omitted so that the internal structure covered by the closed cross-section structural member 17 can be seen. The closed cross-section structure is provided with a closed cross-section structure member 17 extending above the panel frame 10, and the closed cross-section structure member 17 forms a closed cross-section space extending in the width direction on the front side of the panel frame 10. It is formed in a ring shape. The front end of the closed cross-section structural member 17 is coupled to the front side of the panel frame 10. The coupling is performed by a plurality of rivets 18.

  The closed cross-section structural member 17 is provided with two inverted U-shaped headrest frames 13 with both ends fixed. A retractor 14 and a lock mechanism 15 are fixed to the panel frame 10 in the closed cross-section space. The retractor 14 is disposed between the two headrest frames 13, and the lock mechanism 15 is disposed on the left side of the retractor 14.

  Since the headrest frame 13, the retractor 14, and the lock mechanism 15 are fixed to the upper part of the panel frame 10, higher strength is required compared to other parts, but the required strength is ensured by the closed cross-sectional structure. Yes.

  As shown in FIGS. 4 and 5, below the left headrest frame 13, an armrest bracket 16 is fixed to the panel frame 10 so as to be rotatable about the lower end portion of the panel frame 10 as a hinge center. The armrest 5 is fixed to the armrest bracket 16 and is rotatable between a use position and a storage position. In a state where the armrest 5 is in the retracted position, the occupant seated at the center of the three occupants seated is seated at a position corresponding to the armrest 5. A bead 11 is provided at this position. However, the armrest 5 is interposed between the seated occupant and the bead 11, and a good riding comfort can be ensured without giving a foreign body sensation due to the bead 11 to the waist and back of the seated occupant. The lock mechanism 15 is provided corresponding to the upper part of the armrest 5. The upper part of the armrest 5 is a part that hardly affects the ride comfort of the seated occupant. For this reason, the lock mechanism 15 does not give the seated occupant a foreign object feeling.

  When the seat belt 4 restraining the occupant receives a collision load, the upper part of the retractor 14 is pulled forward by the panel frame 10 via the retractor 14. The reason is that the seat belt 4 is wound up by the retractor 14 through the upper side of the retractor 14. At that time, the lock mechanism 15 is in a locked state, and the panel frame 10 is fixed to the upper back 31 via the lock mechanism 15. Therefore, a bending moment is applied to the panel frame 10 so that the upper part of the retractor 14 is moved forward with the fixing position of the lock mechanism 15 as a base point. The fixing position of the lock mechanism 15 with respect to the upper part of the retractor 14 is located on the lower left side, and the bead 11 is formed in a direction to increase the bending rigidity of the panel frame 10 against this bending moment. Therefore, the deformation of the panel frame 10 when the seat belt 4 receives a collision load can be suppressed. Moreover, the retractor 14 and the lock mechanism 15 are disposed adjacent to each other, and the distance between them is shortened. Therefore, the bending moment can be reduced.

  As shown in FIGS. 5 and 7, the surface of the panel frame 10 is covered with a cover material 20. The cover material 20 includes three layers of a relatively hard fiber pad 21, a relatively soft urethane pad 22, and a skin 23. The fiber pad 21 is placed in contact with the front side of the panel frame 10, covered with a urethane pad 22, and further covered with a skin 23 to be fixed around the back side of the panel frame 10. In this way, by fixing the end portion of the skin 23 around the panel frame 10, the cover material 20 is integrated with the surface of the panel frame 10 with the fiber pad 21 and the urethane pad 22 sandwiched between the front surface of the panel frame 10. It is fixed to. In addition, the center portion excluding the periphery of the back side of the panel frame 10 (corresponding to the anti-sitting surface side of the present invention) is not covered by the cover material 20, and when the large-side seat back 1R is tilted forward, the panel frame 10 The back surface of is exposed to the surface. Thus, since the back side of the panel frame 10 is not covered with the cover material 20, the seat back 1 can be thinned.

  In FIG. 4, a region A is a region corresponding to the waist and back of an occupant seated at the right end when three people are seated. As described above, as a result of the bead 11 being formed to be inclined, the bead 11 is not provided in the region A, and the bead 11 is provided in a portion separated from the region A. Therefore, the waist and back of the seated occupant are not given a foreign body feeling due to the beads 11, the pad thickness required when such a foreign object is generated is avoided, and the ride comfort and the seat back are reduced. Can be realized simultaneously. The region A corresponds to a specific part that is important for securing the ride comfort in the present invention.

  Although not shown, the small seat back 1L is configured in the same manner as the large seat back 1R. However, the retractor 14, the armrest 5, and the closed cross-section structural member 17 are not provided in the small seat back 1L. In the small seat back 1L, the beads are formed symmetrically with respect to the beads 11 of the large seat back 1R. Therefore, no bead is provided in the portion corresponding to the waist and back of the occupant seated at the left end when three people are seated.

  In the panel frame 10, a concavo-convex pattern by emboss molding is applied to a part other than the part where the beads 11 and 12 are formed. Specifically, as shown in FIG. 8, the protrusion 19 formed by embossing is formed so as to protrude to the back side of the panel frame 10. For this reason, when the seat backs 1L and 1R are brought forward, it is possible to suppress deterioration in appearance due to the cover material 20 not being covered. Further, when the luggage is moved on the back side of the seat backs 1L and 1R that are brought forward, the contact area between the back side of the seat backs 1L and 1R and the luggage is reduced. Therefore, the frictional resistance is suppressed, and the movement of the load can be facilitated. In addition, the shape of the surface edge part of the protrusion 19 may be circular or may be other shapes. In the case of another shape, the frictional resistance with the load can be reduced when the load is moved in the front-rear direction, and can be increased when the load is moved in the left-right direction. In that case, it is easy to move when loading and unloading, and lateral movement in the loaded state can be suppressed.

  As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example, in the above embodiment, the present invention is applied to an automobile seat, but may be applied to a seat mounted on an airplane, a ship, a train or the like.

DESCRIPTION OF SYMBOLS 1 Seat back 1L Small side seat back 1R Large side seat back 2 Seat cushion 3 Headrest 4 Seat belt 5 Armrest 10 Panel frame 11 Bead 12 Bead 13 Headrest frame 14 Retractor (belt fixing member)
15 lock mechanism 15a latch mechanism 15b striker 16 armrest bracket 17 closed cross-section structural member 18 rivet 19 protrusion 20 cover material 21 fiber pad 22 urethane pad 23 skin 31 upper back 32 trunk room floor 33 trunk room

Claims (5)

A panel frame made of plate material that forms the structural member of the seat back that is the backrest;
A belt fixing member fixed to an upper portion of the panel frame and fixing an end portion of an occupant restraint seat belt;
A locking mechanism that is fixed to the panel frame and selectively fixes a seat back with the vehicle body;
A vehicle seat provided on a surface of the panel frame, and a bead that increases the bending rigidity of the panel frame,
With respect to the fixing position of the belt fixing member, the fixing position of the locking mechanism is a lower side,
The bead extends in the vertical direction, and is provided along the direction connecting the fixing position of the belt fixing member and the fixing position of the lock mechanism at the upper part of the panel frame. A vehicle seat that is not provided at a specific part that is important for securing the vehicle, but is provided at a part away from the specific part. In claim 1,
A specific part important for securing the ride comfort is a vehicle seat which is a part corresponding to the waist and back of a seated occupant. In claim 1 or 2,
The seat back is equipped with an armrest that is embedded and stored inside the seat back when not in use, and is moved to a use position on the seat back surface when in use.
The armrest is provided corresponding to the part where the bead is provided,
The locking mechanism is a vehicle seat provided corresponding to an upper portion of the armrest. In any of claims 1 to 3,
In the upper part of the panel frame, a portion corresponding to the belt fixing member and the lock mechanism has a closed cross-sectional structure, and the closed cross-sectional structure is formed so that the closed cross-sectional space extends in the width direction of the seat back. Vehicle seat. In any of claims 1 to 4,
On the seating surface side of the panel frame, a pad for securing riding comfort and a skin for fixing the pad to the panel frame are sequentially covered in layers,
A vehicle seat in which at least a central portion of the panel frame on the side opposite to the seating surface is provided with a concavo-convex pattern having a plurality of protrusions without being covered with the pad and the skin.

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