Vehicular seat

Abstract

To obtain a vehicular seat which can preferably regulate seat longitudinal positions of a seat back pad and preferably displace a side support pad part to a seat front side.SOLUTION: A pad side part 34 of a seat back pad 30 is provided continuously on a seat front side to a side frame 22, on an outside in a seat width direction, and on a seat rear side, and arranged so as to embrace the side frame 22 and a side support adjustment mechanism 40. A protrusion amount of a side port pad part 34A in the pad side part 34 to the seat front side is adjusted by the side support adjustment mechanism 40. Here, a rear end part 34B of the pad side part 34 has a projection portion 34C projecting inside of the seat width direction, so that a front face 34C1 of the projection portion 34C inclines to the seat rear side toward inside of the seat width direction and is in contact with a rear face 22A of the side frame 22.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a vehicle seat provided with a side support adjustment mechanism.

Background Art

[0002] The following Patent Document 1 discloses a vehicle seat capable of changing the position of the side support of the seat back.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the above prior art, the side portions of the pad of the seat back are not provided on the outside in the seat width direction and on the rear side of the seat with respect to the side frame, but the side portions of the pad of the seat back may be continuously provided on the front side of the seat, on the outside in the seat width direction, and on the rear side of the seat with respect to the side frame so as to embrace the side frame or the like. In such a configuration, the position of the pad of the seat back in the front-rear direction of the seat can be regulated by the side frame or the like, but there is room for improvement in terms of displacing the pad portion for side support well to the front side of the seat because of such a regulating function.

[0005] In consideration of the above facts, an object of the present invention is to obtain a vehicle seat capable of regulating the position of the seat back pad in the front-rear direction of the seat well and displacing the pad portion for side support well to the front side of the seat.

Means for Solving the Problems

[0006] The vehicle seat according to the first aspect includes a seat back frame that constitutes the skeleton of the seat back and has a pair of left and right side frames extending in the seat vertical direction on both sides in the seat width direction of the seat back, a pad main body portion supported by the seat back frame and disposed at an intermediate portion in the seat width direction of the seat back, and a pair of left and right pad side portions disposed outside the pad main body portion in the seat width direction. The seat back pad has a side support pad portion in which the pad side portion protrudes forward of the seat with respect to the pad main body portion, and a side support adjustment mechanism attached to the side frame for adjusting the amount of protrusion of the side support pad portion forward of the seat. The pad side portion is continuously provided on the front side, outer side in the seat width direction, and rear side of the seat with respect to the side frame so as to hold the side frame and the side support adjustment mechanism. The rear end portion of the pad side portion has a protruding portion protruding inward in the seat width direction, and the front surface of the protruding portion is inclined rearward in the seat with respect to the inner side in the seat width direction and is in contact with the rear surface side of the side frame.

[0007] In the vehicle seat according to the first aspect, the pad side portion of the seat back pad is continuously provided on the front side, outer side in the seat width direction, and rear side of the seat with respect to the side frame so as to hold the side frame and the side support adjustment mechanism. As a result, the position of the seat back pad including the pad side portion in the front-rear direction of the seat is regulated by the side frame and the side support adjustment mechanism.

[0008] On one hand, the amount of protrusion of the side support pad portion in the pad side portion toward the front side of the seat is adjusted by the side support adjustment mechanism. Here, the rear end portion of the pad side portion has a protruding portion that protrudes inward in the seat width direction, and the front surface of the protruding portion is inclined toward the rear side of the seat inward in the seat width direction and is in contact with the rear surface side of the side frame. Therefore, when the amount of protrusion of the side support pad portion toward the front side of the seat is adjusted to increase by the side support adjustment mechanism, when the side support pad portion tries to move toward the front side of the seat, the pad side portion can move obliquely outward in the seat width direction toward the front of the seat while the front surface of the protruding portion at its rear end portion is in contact with the rear surface side of the side frame. Thereby, even if a protruding portion that contacts the rear surface side of the side frame is provided on the pad side portion, the side support pad portion can be favorably displaced toward the front side of the seat by effectively using the operating force of the side support adjustment mechanism.

[0009] In the vehicle seat according to the second aspect, in the first aspect, the angle formed by the front surface of the protruding portion with respect to the seat width direction in the non-operating state of the side support adjustment mechanism is 40° or more and 60° or less.

[0010] In the vehicle seat according to the second aspect, since the front surface of the protruding portion is in contact with the rear surface side of the side frame and the angle formed by the front surface of the protruding portion with respect to the seat width direction in the non-operating state of the side support adjustment mechanism is 40° or more and 60° or less, while enabling position regulation in the seat front-rear direction of the seat back pad including the pad side portion, it is possible to suppress the reaction force when the side support adjustment mechanism operates and the front surface of the protruding portion moves obliquely outward in the seat width direction toward the front of the seat while contacting the rear surface side of the side frame.

Advantages of the Invention

[0011] As described above, according to the present invention, there is an excellent effect that the position of the seat back pad in the seat front-rear direction can be favorably regulated and the side support pad portion can be favorably displaced toward the front side of the seat.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0013] Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. In these figures, the arrow FR appropriately shown indicates the front side of the seat, the arrow UP indicates the upper side of the seat, and the arrow W indicates the seat width direction (left-right direction of the seat). Hereinafter, when simply explaining the directions of front and rear, up and down, and left and right, unless otherwise specified, it shall indicate the front and rear in the seat front-rear direction, the up and down in the seat up-down direction, and the left and right in the seat left-right direction. Also, in each figure, some reference numerals may be omitted for ease of viewing the drawing.

[0014] (Configuration of the Embodiment) In FIG. 1, a front view of the vehicle seat 10 according to the present embodiment as viewed from the front side is schematically shown. Further, in FIG. 2, a plan view of the vehicle seat 10 as viewed from above the seat is schematically shown. As shown in FIGS. 1 and 2, the vehicle seat 10 has a seat cushion 12 that supports the thighs and buttocks of the seated occupant, a seat back 14 that supports the back of the seated occupant, and a headrest 16 that supports the head of the seated occupant. This vehicle seat 10 is, for example, a front seat of a vehicle.

[0015] FIG. 3 schematically shows a cross-sectional view of the seat back 14 taken along the line 3-3 of FIG. 1. Since the seat back 14 is generally symmetrically configured, the illustration of the cross-section on the left side of the seat of the seat back 14 is omitted in FIG. 3 (the same applies to FIG. 4). As shown in FIG. 3, the seat back 14 includes a seat back frame 20 that constitutes the framework of the seat back 14. The seat back frame 20 includes a pair of left and right side frames 22 that extend in the seat vertical direction on both sides in the seat width direction of the seat back 14, an upper frame (not shown) that is substantially inverted U-shaped in front view and connects the upper ends of the pair of left and right side frames 22, a lower frame (not shown) that connects the lower ends of the pair of left and right side frames 22 in the left-right direction, and a wire frame (not shown) attached to the back side of the pair of left and right side frames 22.

[0016] The side frames 22 and the lower frame are constituted by press-formed metal plates. The side frame 22 includes, as an example, a side frame body 24 having a substantially U-shaped (substantially C-shaped) cross-section that is open to the inside in the seat width direction in a horizontal cross-sectional view, and a reinforcement 26 having a substantially U-shaped (substantially C-shaped) cross-section that is open to the outside in the seat width direction in a horizontal cross-sectional view. The front ends and the rear ends of the side frame body 24 and the reinforcement 26 are joined by welding. The upper frame is constituted by a metal pipe. The wire frame is constituted by, for example, a plurality of wires welded to each other. The upper frame, the lower frame, and the wire frame are joined to the pair of left and right side frames 22 by welding.

[0017] Further, the seat back 14 includes a seat back pad 30 supported by a seat back frame 20. The seat back pad 30 is made of a foam material such as urethane foam, etc., and constitutes a cushioning material in the seat back 14. The seat back pad 30 has a pad main body portion 32 disposed at an intermediate portion in the seat width direction of the seat back 14, and a pair of left and right pad side portions 34 disposed outside the pad main body portion 32 in the seat width direction. The pair of left and right pad side portions 34 have side support pad portions 34A protruding forward of the seat with respect to the pad main body portion 32. Details of the pad side portion 34 will be described later.

[0018] A seat back skin 38 is covered on the seat back pad 30. The seat back skin 38 is formed in a bag shape by sewing a plurality of skin pieces made of a cloth material, leather, synthetic leather, etc., and is covered on the seat back pad 30 from above the seat. In FIG. 3, the cross section of the seat back skin 38 is shown by a thick line without showing the thickness, and in order to make the figure easier to see, the portion in contact with the seat back pad 30 is shown slightly separated. Further, in the following description, the side support pad portion 34A and the portion of the seat back skin 38 that covers the side support pad portion 34A are collectively referred to as the side support 14S.

[0019] Further, the seat back 14 includes a pair of left and right side support adjustment mechanisms 40 respectively attached to a pair of left and right side frames 22. The side support adjustment mechanism 40 is a mechanism for adjusting the protruding amount of the side support pad portion 34A forward of the seat. The approximate moving direction of the side support 14S when the side support adjustment mechanism 40 is operated is indicated by an arrow P of a two-dot chain line in FIG. 2.

[0020] The side support adjustment mechanism 40 shown in FIG. 3 will be briefly described. As an example, the side support adjustment mechanism 40 includes a mounting bracket 42 and a paddle 44. The mounting bracket 42 is made of resin and formed in a bent plate shape. It is joined to the reinforcement 26 of the side frame 22 from the inner side in the seat width direction, and the portion on the front side of the seat is disposed within the side support 14S. The paddle 44 is made of resin and formed in a plate shape. It is disposed within the side support 14S and is inclined forward in the seat front side direction toward the outer side in the seat width direction. The surface facing the diagonally forward side in the seat width direction is in contact with a part of the rear-side configuration surface of the side support pad portion 34A. A rotation center (not shown) is provided at the end of the paddle 44 on the rear side of the seat. The paddle 44 is rotatably supported with respect to the mounting bracket 42 around the axis in the seat vertical direction. The paddle 44 is configured to be rotated between the retracted position shown in FIG. 3 and the protruding position shown in FIG. 4 by the driving force of a driving motor (not shown). Since a known configuration can be applied to the configuration for rotating the paddle 44, a detailed description thereof is omitted.

[0021] On the other hand, as shown in FIG. 3, the pad side portion 34 is continuously provided on the front side, outer side in the seat width direction, and rear side of the seat with respect to the side frame 22, and is arranged so as to hold the side frame 22 and the side support adjustment mechanism 40. The rear end portion 34B of the pad side portion 34 has a protruding portion 34C protruding inward in the seat width direction. The front surface 34C1 of the protruding portion 34C is inclined rearward in the seat width direction and is in contact with the rear surface 22A side of the side frame 22.

[0022] Also, in the non-operating state of the side support adjustment mechanism 40 (the state shown in FIG. 3), the angle θ formed by the front surface 34C1 of the protruding portion 34C with respect to the seat width direction is 40° or more and 60° or less, and preferably 45° or more and 55° or less. Further, the protruding tip 34D of the protruding portion 34C is set at a position outside the seat width direction with respect to the inner end 22B of the side frame 22 in the seat width direction.

[0023] FIG. 5 schematically shows a perspective view of the seat back pad 30 alone as viewed from the obliquely rear side of the seat. As shown in FIG. 5, the pad side portion 34 extends along the seat vertical direction. Further, the protruding portion 34C formed at the rear end portion 34B of the pad side portion 34 also extends along the seat vertical direction, but the protruding portion 34C is not formed in a part of the rear end portion 34B of the pad side portion 34. Note that the range in the seat vertical direction where the protruding portion 34C is formed at the rear end portion 34B of the pad side portion 34 can be appropriately changed.

[0024] (Functions and Effects of the Embodiment) Next, the functions and effects of the present embodiment will be described.

[0025] In the present embodiment, as shown in FIG. 3, the pad side portion 34 of the seat back pad 30 is continuously provided on the seat front side, the outside in the seat width direction, and the seat rear side with respect to the side frame 22 and is arranged so as to hold the side frame 22 and the side support adjustment mechanism 40. Thereby, the position of the seat back pad 30 including the pad side portion 34 in the seat front-rear direction is regulated by the side frame 22 and the side support adjustment mechanism 40.

[0026] On the other hand, the amount of protrusion of the side support pad portion 34A in the pad side portion 34 toward the front side of the seat is adjusted by the side support adjustment mechanism 40. Here, the rear end portion 34B of the pad side portion 34 has a protruding portion 34C that protrudes inward in the seat width direction, and the front surface 34C1 of the protruding portion 34C is inclined toward the rear side of the seat inward in the seat width direction and is in contact with the rear surface 22A side of the side frame 22. For this reason, when the amount of protrusion of the side support pad portion 34A toward the front side of the seat is adjusted to increase by the side support adjustment mechanism 40, when the side support pad portion 34A tries to move toward the front side of the seat by the rotational force of the paddle 44, as shown in FIG. 4, the pad side portion 34 can move obliquely outward in the seat width direction toward the front of the seat while the front surface 34C1 of the protruding portion 34C at the rear end portion 34B thereof is in contact with the rear surface 22A side of the side frame 22. That is, the entire pad side portion 34 can follow the operation of the paddle 44 of the side support adjustment mechanism 40. Thereby, even if the protruding portion 34C that contacts the rear surface 22A side of the side frame 22 is provided on the pad side portion 34, the side support pad portion 34A can be favorably displaced toward the front side of the seat by effectively using the operating force of the side support adjustment mechanism 40.

[0027] Also, as shown in FIG. 3, in the present embodiment, since the front surface 34C1 of the protruding portion 34C is in contact with the rear surface 22A side of the side frame 22 and the angle θ formed by the front surface 34C1 of the protruding portion 34C with respect to the seat width direction in the non-operating state of the side support adjustment mechanism 40 is 40° or more and 60° or less, while enabling position regulation in the seat front-rear direction of the seat back pad 30 including the pad side portion 34, it is possible to suppress the reaction force when the side support adjustment mechanism 40 operates and the front surface 34C1 of the protruding portion 34C moves obliquely outward in the seat width direction toward the front of the seat while being in contact with the rear surface 22A side of the side frame 22. Further, since the protruding portion 34C becomes relatively small, the cost can also be suppressed.

[0028] As described above, according to the present embodiment, the position of the seat back pad 30 in the seat front-rear direction can be favorably regulated, and the side support pad portion 34A can be favorably displaced toward the front side of the seat, making it possible to improve the support performance by the side support 14S.

[0029] (Supplementary Explanation of the Embodiment) In the above embodiment, the front surface 34C1 of the protruding portion 34C is not directly connected to the rear surface 34E of the protruding portion 34C. However, as a modification of the above embodiment, a configuration in which the front surface (34C1) of the protruding portion (34C) is directly connected to the rear surface (34E) of the protruding portion (34C) can also be adopted.

[0030] Further, in the above embodiment, the angle θ formed by the front surface 34C1 of the protruding portion 34C with respect to the seat width direction in the non-operating state of the side support adjustment mechanism 40 is set to be 40° or more and 60° or less, and such a configuration is preferable. However, as a modification of the above embodiment, a configuration in which the angle (θ) formed by the front surface (34C1) of the protruding portion (34C) with respect to the seat width direction in the non-operating state of the side support adjustment mechanism (40) is set to be less than 40° or greater than 60° can also be adopted.

[0031] Further, in the above embodiment, the protruding tip 34D of the protruding portion 34C is set at a position outside the seat width direction with respect to the inner end 22B in the seat width direction of the side frame 22. However, as a modification of the above embodiment, a configuration in which the protruding tip of the protruding portion is set at a position in the seat width direction equivalent to the inner end (22B) in the seat width direction of the side frame (22) or at a position inside the seat width direction with respect to the inner end (22B) in the seat width direction of the side frame (22) can also be adopted.

[0032] In the above-described embodiment, the side support adjustment mechanism 40 rotates the paddle 44 by the driving force of a drive motor (not shown) to adjust the amount of protrusion of the side support pad portion 34A toward the front side of the seat. However, the side support adjustment mechanism may have, for example, an airbag provided in the side support (14S) and may adjust the amount of protrusion of the side support pad portion (34A) toward the front side of the seat by expanding and contracting the airbag.

[0033] In the above-described embodiment, the case where the vehicle seat 10 is a front seat of the vehicle has been described. However, the vehicle seat according to the present invention may be applied to a rear seat of the vehicle.

[0034] Note that the above-described embodiment and the plurality of above-described modified examples can be implemented in appropriate combination.

[0035] Although an example of the present invention has been described above, the present invention is not limited to the above, and it goes without saying that various modifications can be made without departing from the gist thereof.

Explanation of Reference Numerals

[0036] 10 Vehicle seat 14 Seat back 20 Seat back frame 22 Side frame 22A Rear surface of side frame 30 Seat back pad 32 Pad main body portion 34 Pad side portion 34A Side support pad portion 34B Rear end portion of pad side portion 34C Protrusion 34C1 Front surface of protrusion 40 Side support adjustment mechanism θ Angle formed by the front surface of the protrusion with respect to the seat width direction

Claims

1. A seat back frame that constitutes the skeleton of the seat back and has a pair of left and right side frames extending in the seat vertical direction on both sides in the seat width direction of the seat back; A seat back pad supported by the seat back frame and having a pad main body portion disposed at an intermediate portion in the seat width direction of the seat back, and a pair of left and right pad side portions disposed outside the pad main body portion in the seat width direction. The pad side portion has a side support pad portion that protrudes forward of the seat with respect to the pad main body portion; A side support adjustment mechanism attached to the side frame for adjusting the amount of protrusion of the side support pad portion forward of the seat; and The pad side portion is continuously provided on the front side, outside in the seat width direction, and rear side of the seat with respect to the side frame so as to hold the side frame and the side support adjustment mechanism. The rear end portion of the pad side portion has a protruding portion that protrudes inward in the seat width direction. The front surface of the protruding portion is inclined rearward in the seat width direction and is in contact with the rear surface side of the side frame. A vehicle seat.

2. The vehicle seat according to claim 1, wherein an angle formed by the front surface of the protruding portion with respect to the seat width direction in a non-operating state of the side support adjustment mechanism is 40° or more and 60° or less.

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