Vehicle seat

Abstract

To provide a vehicle seat capable of appropriately supporting a shock absorbing member.SOLUTION: A vehicle seat S comprises a seat cushion S1 and a seat back S2. The seat cushion comprises: a seat cushion frame 10; a seat cushion pad S11; and a shock absorbing member 50 disposed below the seat cushion pad. The seat cushion frame comprises: a pair of side frames 10a; a first connection member 11 connecting the pair of side frames in a seat width direction; a second connection member 12 arranged behind the first connection member and connecting the pair of side frames in the seat width direction; and a bridging member 13 that extends in a longitudinal direction and bridges the first connection member and the second connection member. The shock absorbing member 50 is arranged on the bridging member 13.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat capable of absorbing shock applied to a seated occupant when an impact such as a collision occurs. [Background technology]

[0002] When a moving vehicle crashes head-on, the body of the occupant (passenger) seated in the seat may slide forward and downward on the surface of the seat while restrained by the seat belt, resulting in a "submarine phenomenon." As a technology for absorbing the shock applied to the occupant when such a shock occurs, Patent Document 1 describes a technology in which a shock absorbing member, which is an insert material made of a honeycomb structure, is provided below the seat cushion pad. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 58-161600 Summary of the Invention [Problem to be solved by the invention]

[0004] In order for a shock absorbing member provided in a vehicle seat to effectively absorb a shock, the shock absorbing member needs to be appropriately supported from below.

[0005] The present invention has been made in consideration of the above problems, and has an object to provide a vehicle seat that is capable of appropriately supporting an impact absorbing member. [Means for solving the problem]

[0006] The above problem is solved by the vehicle seat of the present invention, which provides a vehicle seat including a seat cushion and a seat back, wherein the seat cushion has a seat cushion frame, a seat cushion pad, and an impact absorbing member provided below the seat cushion pad, and the seat cushion frame includes a pair of side frames, a first connecting member connecting the pair of side frames in the width direction of the vehicle seat, a second connecting member arranged rearward of the first connecting member and connecting the pair of side frames in the width direction of the vehicle seat, and a bridging member extending in the front-rear direction of the vehicle seat and bridging the first connecting member and the second connecting member, and the impact absorbing member is arranged on the bridging member.

[0007] In the vehicle seat of the present invention configured as described above, the impact absorbing member can be appropriately supported by the bridging member.

[0008] In the above configuration, the bridging member may be a plate-shaped member. In the above-described configuration, the shock absorbing member can be firmly supported by the plate-like member.

[0009] In the above configuration, the bridging member may be a wire member. In the above-described configuration, the impact absorbing member can be easily supported by the wire member.

[0010] In the above configuration, the width of the impact absorbing member in the width direction of the vehicle seat may be greater than the width of the bridging member. In the above-described configuration, the shock absorbing member, which is supported by the bridging member and has a width greater than that of the bridging member, can effectively absorb shock.

[0011] In the above configuration, the impact absorbing member may be disposed closer to the front of the bridging member in the front-rear direction of the vehicle seat. In the above-described configuration, by disposing the shock absorbing member at the front where shocks are likely to be applied, it becomes possible to effectively absorb shocks.

[0012] In the above configuration, the bridging member may include a raised portion extending in a front-rear direction of the vehicle seat, and the impact absorbing member may be placed on the raised portion. In the above-described configuration, the shock absorbing member is disposed in the portion reinforced by the raised portion, so that the shock absorbing member is firmly supported, and shock can be effectively absorbed.

[0013] In the above configuration, the bridging member may include an inclined portion inclined upward from the rear to the front, and the impact absorbing member may be placed on the inclined portion. In the above-described configuration, the shock absorbing member is disposed at a portion of the bridging member that is inclined in a direction in which a shock is likely to be applied, thereby making it possible to effectively absorb the shock.

[0014] In addition, in the above configuration, an opening that opens in the vertical direction of the vehicle seat is formed in the bridging member, and the impact absorbing member is positioned in a position that overlaps with the opening in the front-to-rear direction of the vehicle seat. With the above-described configuration, when manufacturing the vehicle seat, it is possible to confirm through the opening that the impact absorbing member is disposed on the bridging member.

[0015] In the above configuration, the vehicle seat may be switchable to a tip-up state in which the seat cushion is flipped up toward the seat back. With the above configuration, in a vehicle seat that can be switched to a tip-up state, it becomes possible for the impact absorbing member to be appropriately supported by the bridging member.

[0016] In the above configuration, the seat cushion may include the seat cushion frame and a cover material that covers the seat cushion pad. With the above-described configuration, it is possible to appropriately support the impact absorbing member in a vehicle seat including a seat cushion having a bridging member. Effect of the Invention

[0017] According to the vehicle seat of the present invention, the impact absorbing member can be appropriately supported by the bridging member. Furthermore, according to the vehicle seat of the present invention, the impact absorbing member can be firmly supported by the plate member. Furthermore, according to the vehicle seat of the present invention, the impact absorbing member can be easily supported by the wire member. Furthermore, according to the vehicle seat of the present invention, it is possible to effectively absorb impacts by the impact absorbing member which is supported by the bridging member and has a width greater than that of the bridging member. Furthermore, according to the vehicle seat of the present invention, by disposing the impact absorbing member at the front where an impact is likely to be applied, it becomes possible to effectively absorb the impact. Furthermore, according to the vehicle seat of the present invention, by disposing the impact absorbing member in the portion reinforced by the raised portion, the impact absorbing member is firmly supported, making it possible to effectively absorb impact. Furthermore, according to the vehicle seat of the present invention, it is possible to effectively absorb impact by disposing the impact absorbing member at a portion of the bridging member that is inclined in a direction in which an impact is likely to be applied. Furthermore, according to the vehicle seat of the present invention, it is possible to confirm that the impact absorbing member is disposed on the bridging member during the manufacture of the vehicle seat. Furthermore, according to the vehicle seat of the present invention, in a vehicle seat that can be switched to a tip-up state, it becomes possible for the impact absorbing member to be appropriately supported by the bridging member. Furthermore, according to the vehicle seat of the present invention, it is possible to appropriately support the impact absorbing member in the vehicle seat provided with the seat cushion having the bridging member. [Brief description of the drawings]

[0018] [Figure 1]1 is an external view of a vehicle seat according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a side view of the vehicle seat when the seat is in a seated state. [Diagram 3] FIG. 2 is a side view of the vehicle seat when the seat state is in a stowed state. [Figure 4] FIG. 2 is a side view of the vehicle seat when the seat state is in a tip-up state. [Diagram 5] FIG. 2 is a perspective view of the vehicle seat when the seat state is in a tip-up state. [Figure 6] 2 is a perspective view of a seat frame of the vehicle seat; FIG. [Figure 7] 2 is a top view of a seat cushion frame of the vehicle seat. FIG. [Figure 8] 13 is an explanatory diagram showing an arrangement of a seat cushion frame and an impact absorbing member according to a modified example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] A vehicle seat according to an embodiment of the present invention (hereinafter, the present embodiment) will be described below with reference to Figures 1 to 8. Note that the embodiment described below is merely an example for facilitating understanding of the present invention, and does not limit the present invention. In other words, the shapes, dimensions, arrangements, etc. of the members described below may be changed or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.

[0020] In the following, a vehicle seat mounted on a vehicle will be given as an example of a vehicle seat, and an example of the configuration will be described. However, the present invention is not limited to vehicle seats mounted on vehicles that have wheels and run on the ground, such as automobiles and trains, and can also be applied to seats mounted on aircraft, ships, and other vehicles that move on non-ground surfaces.

[0021] In this specification, the terms indicating directions are defined as shown in FIG. 1. Specifically, in the following description, the "front-rear direction" means the front-rear direction as seen by a person sitting in the vehicle seat, and is the direction that coincides with the vehicle's traveling direction. The "seat width direction" means the width direction of the vehicle seat, and coincides with the left-right direction as seen by a person sitting in the vehicle seat. Additionally, the "up-down direction" means the height direction of the vehicle seat, and coincides with the up-down direction as seen by the vehicle seat from the front.

[0022] In addition, the "outside side of the vehicle" in the seat width direction means the side closer to the outside of the vehicle body (or, more simply, the side closer to the nearest door), and the "inside side of the vehicle" means the side closer to the inside of the vehicle body (or, more simply, the side away from the nearest door). In the following description, unless otherwise specified, "rotation" refers to a rotational movement about an axis along the sheet width direction.

[0023] In addition, the shape, position, and posture of each part of the seat described below will be described assuming that the vehicle seat is in a seated state, which will be described later, unless otherwise specified.

[0024] [1. Configuration of the vehicle seat S] The basic configuration of a vehicle seat (hereinafter, vehicle seat S) according to this embodiment will be described with reference to FIG. 1. FIG. 1 is a perspective view of the vehicle seat S. The vehicle seat S is placed on a vehicle body floor and is a seat in which a vehicle occupant sits. In this embodiment, the vehicle seat S is used as a rear seat that corresponds to the rear seat of the vehicle. However, this is not limited thereto, and the vehicle seat S can also be used as a second-row middle seat or a third-row rear seat in a vehicle equipped with three rows of seats in the front-rear direction.

[0025] As shown in Fig. 1, the vehicle seat S has a seat body Sh which constitutes the main body of the seat. As shown in the figure, the seat body Sh includes a seat cushion S1, a seat back S2, and a headrest S3. The seat back S2 is attached to the vehicle floor via a support base 30 described later in a rotatable manner.

[0026] The rear end of the seat cushion S1 is connected to the lower end of the seat back S2. As shown in FIG. 1, a seat cushion side frame 10a is interposed between the rear end of the seat cushion S1 and the lower end of the seat back S2 as a connecting member. The seat cushion side frame 10a is attached to the seat back S2 in a rotatable state. This allows the seat cushion S1 to rotate together with the seat cushion side frame 10a relative to the seat back S2.

[0027] A slide rail mechanism S4 (described later) is provided below the seat body Sh. The slide rail mechanism S4 allows the seat body Sh to be attached to the vehicle floor in a slidable state in the front-rear direction.

[0028] The seat body Sh can be folded and stored in a storage floor F formed in front of it. The storage floor F is a recessed space formed by recessing a part of the vehicle floor (specifically, the part of the vehicle floor that is located in front of the seat body Sh when the seat body Sh is in a seated state) downward.

[0029] <Changes in the condition of the seat body Sh> In this embodiment, it is possible to change the state of the seat body Sh (hereinafter, referred to as the seat state). The change in the seat state will be described below with reference to FIGS.

[0030] (Seated) The seating state shown in Fig. 2 is a state in which the seat back S2 stands upright relative to the vehicle floor, and an occupant can be seated on the seat cushion S1. When the seat is in a seating state, as shown in Figs. 1 and 2, the seat back S2 is slightly tilted backward, and the seat cushion S1 is in a position in which its seating surface (the surface on which the occupant's buttocks and thighs rest) faces upward.

[0031] (Stored state) The stored state shown in Fig. 3 is a state in which the seat body Sh is folded and stored within the storage floor F. When the seat body Sh transitions to the stored state, the seat back S2 folds forward relative to the vehicle floor, and the seat cushion S1 rotates in a direction approaching the seat back S2. Then, when the seat state becomes the stored state, as shown in Fig. 3, the rear surface (back surface) of the seat back S2 is at the same height (level) as the periphery of the storage floor F of the vehicle floor, and the seat cushion S1 is disposed between the seat back S2 and the vehicle floor.

[0032] (Tip up state) As shown in Figs. 4 and 5, the tip-up state is a state in which the seat back S2 stands upright relative to the vehicle floor, while the seat cushion S1 flips up toward the seat back S2.

[0033] [2. Configuration of each part of the vehicle seat S] Hereinafter, the configuration of each part of the vehicle seat S will be described with reference to Figs. 6 and 7 as well as Figs. 1 to 5. Fig. 6 is a perspective view of a seat frame forming the framework of the vehicle seat S. Fig. 7 is a top view of a seat cushion frame 10 of the vehicle seat S. The seat cushion S1 and the seat back S2 are equipped with the seat cushion frame 10 and the seat back frame 20 shown in Fig. 6, respectively.

[0034] The seat cushion S1 and the seat back S2 are connected by a seat cushion side frame 10a as a connecting member. The seat cushion side frame 10a is a substantially L-shaped member in a side view and extends in the front-rear direction of the seat. The seat cushion side frame 10a is formed by processing a metal plate, and connects the seat cushion frame 10 and the seat back frame 20 at the end of the seat main body Sh in the seat width direction. The rear end of the seat cushion side frame 10a is attached to the seat back frame 20 in a rotatable state. In other words, the seat cushion S1 rotates together with the seat cushion side frame 10a relative to the seat back S2 as the rear end of the seat cushion side frame 10a rotates relative to the seat back frame 20.

[0035] To explain the configuration of the seat body Sh in more detail, a damper S13 is provided on the back surface of the seat cushion S1 of this embodiment (the lower surface of the seat cushion S1 when the seat is in a seated state) as shown in Fig. 5. The damper S13 is a convex protrusion protruding downward from the back surface of the seat cushion S1 (the opposite side to the side where the seating surface is located in the thickness direction of the seat cushion S1). The damper S13 has an oval shape when viewed from the front, and protrudes from the center of the front end region in the seat width direction on the back surface of the seat cushion S1 as shown in Fig. 5.

[0036] In addition, when the seat is in the stored state, the damper S13 abuts against the vehicle floor at its tip (lower end), thereby preventing the back surface of the seat cushion S1 from coming into contact with the vehicle floor and becoming dirty while the seat is in the stored state.

[0037] The damper S13 is operated when the seat state is switched from the tip-up state to the seated state. More specifically, a slit S14 is provided in the front end region of the back surface of the seat cushion S1, which extends from the center of the seat cushion S1 toward the outside of the vehicle along the seat width direction. In this embodiment, the damper S13 is capable of sliding within the slit S14 along the seat width direction.

[0038] (Support base 30) The vehicle seat S also has a support base 30 shown in Fig. 6. The support base 30 is disposed directly above the slide rail mechanism S4 and supports the seat body Sh (the seat cushion S1 and the seat back S2).

[0039] The first connecting link 21 and the second connecting link 22 are link members bent into an approximately arched shape, and the seat body Sh (strictly speaking, the seat back S2) is fixed to the slide rail mechanism S4 via the first connecting link 21, the second connecting link 22 and the support base 30.

[0040] (Base cover 40) The base cover 40 is a resin molded product that covers the entire support base 30 and the slide rail mechanism S4 from above. In this embodiment, the base cover 40 has a function of guiding the movement of the seat cushion S1 when switching the seat state, in addition to the function of covering the support base 30 and the slide rail mechanism S4.

[0041] [3. Features of the seat cushion S1] The vehicle seat S of this embodiment includes a seat cushion S1 and a seat back S2, and the seat cushion S1 has a seat cushion frame 10, a seat cushion pad S11, and an impact absorbing member 50 provided below the seat cushion pad S11 (FIGS. 2 and 6).

[0042] The seat cushion pad S11 has a pad recess (not shown) formed on its back surface facing upward, and at least a portion of the upper surface 51 of the impact absorbing member 50 is stored in this pad recess, so that the position of the impact absorbing member 50 relative to the seat cushion pad S11 is stable.

[0043] (shock absorbing member 50) 2 and 7, the impact absorbing member 50 has a hollow shape surrounded by an upper surface 51 and a lower surface 52 in the vertical direction, a front surface 53a and a rear surface 53b in the front-rear direction, and a right side surface 54a and a left side surface 54b in the seat width direction. The upper surface 51 of the impact absorbing member 50 is formed with an inclined surface 51a that is inclined downward toward the rear. The front surface 53a of the impact absorbing member 50 is inclined toward the rear from the middle region in the vertical direction to the upper region.

[0044] The shock absorbing member 50 is a hollow blow molded product, and is harder than the seat cushion pad S11, which is a urethane pad, and is formed so as to collapse and absorb shock when a certain load value is exceeded.

[0045] The seat cushion frame 10 includes a pair of seat cushion side frames 10a, a first connecting member 11 that connects the pair of seat cushion side frames 10a in the seat width direction, and a second connecting member 12 that is positioned rearward of the first connecting member 11 and connects the pair of seat cushion side frames 10a in the seat width direction (Figure 7).

[0046] (Bridge member 13) The seat cushion frame 10 includes a bridging member 13 that extends in the front-rear direction and bridges the first connecting member 11 and the second connecting member 12. The bridging member 13 has a front end 13a connected to the first connecting member 11 and a rear end 13b connected to the second connecting member 12 in the front-rear direction.

[0047] 2, the bridging member 13 has an inclined portion 13d that is inclined upward in front of the bent portion 13c, and also has a flat portion 13e that is flat in front of the bent portion 13c.

[0048] The impact absorbing member 50 is disposed on the bridging member 13. Specifically, a lower surface 52 of the impact absorbing member 50 is supported from below by the bridging member 13, which is a plate-shaped member. In the vehicle seat S according to this embodiment configured in this manner, it becomes possible for the bridging member 13 to appropriately support the impact absorbing member 50 from below.

[0049] Moreover, the bridging member 13 is a plate-like member extending in the seat width direction and the front-rear direction. According to this configuration, the impact absorbing member 50 can be firmly supported by the plate-like bridging member 13.

[0050] In the above configuration, the width of the impact absorbing member in the width direction of the vehicle seat may be wider than the width of the bridging member. With this configuration, the impact absorbing member 50, which is supported by the bridging member 13 and has a width wider than the bridging member 13, can effectively absorb impact.

[0051] In addition, in the front-rear direction, the shock absorbing member 50 is disposed closer to the front of the bridging member 13. With this configuration, shock can be effectively absorbed by disposing the shock absorbing member 50 in the front where shock is likely to be applied.

[0052] The bridging member 13 also has a pair of beads 13f as protruding portions extending in the front-rear direction (FIG. 7). The pair of beads 13f are protruding portions that protrude upward. The shock absorbing member 50 is placed on the beads 13f. With this configuration, the shock absorbing member 50 is firmly supported by arranging the shock absorbing member 50 in the portion of the bridging member 13 reinforced by the beads 13f, and it becomes possible to effectively absorb shock.

[0053] In addition, the bridging member 13 has an inclined portion 13d that is inclined upward from the rear to the front, and the shock absorbing member 50 is placed on the inclined portion 13d (FIGS. 2 and 7). With this configuration, it becomes possible to effectively absorb shock by disposing the shock absorbing member 50 on the portion of the bridging member 13 that is inclined in a direction in which shock is likely to be applied (the inclined portion 13d).

[0054] Furthermore, the bridging member 13 has a plurality of openings 13g (four in this embodiment) that open in the up-down direction (FIG. 7). The impact absorbing member 50 is preferably disposed at a position overlapping at least one of the openings 13g in the front-rear direction. With this configuration, during the manufacture of the vehicle seat S, it becomes possible to visually confirm from the rear surface side of the bridging member 13 through the openings 13g that the impact absorbing member 50 is disposed on the bridging member 13.

[0055] In addition, a restricting protrusion 13h (front position restricting portion) protruding upward from the inclined portion 13d is formed at the front end of the bridging member 13. The restricting protrusion 13h extends in the seat width direction and abuts against the front surface 53a of the impact absorbing member 50, thereby supporting the impact absorbing member 50 from the front, thereby stably exerting the impact absorbing effect.

[0056] In addition, the vehicle seat S can be switched to a tip-up state in which the seat cushion S1 is flipped up toward the seat back S2. According to this configuration, in the vehicle seat S that can be switched to the tip-up state, the impact absorbing member 50 can be appropriately supported by the bridging member 13.

[0057] The seat cushion S1 also has a seat cushion frame 10 and a trim cover S12 that covers the seat cushion pad S11. With this configuration, the impact absorbing member 50 can be appropriately supported in the vehicle seat S that includes the seat cushion S1 having the bridging member 13.

[0058] [3. Modifications] Up to this point, the configuration of a vehicle seat S according to one embodiment of the present invention has been described. However, the above embodiment is merely an example for making it easier to understand the present invention and does not limit the present invention.

[0059] Hereinafter, a seat cushion frame according to a modified example will be described with reference to Fig. 8. Fig. 8 is an explanatory diagram showing an arrangement of a seat cushion frame 10X according to a modified example and an impact absorbing member 50. In the following explanation, only the parts different from the above embodiment will be described.

[0060] In the above embodiment, the bridging member is a plate-like member, but the bridging member may be a part of the seat cushion frame, and the material is not limited to metal and may be a member made of resin. Also, the bridging member does not have to be a plate-like member, and may be, for example, a linear member such as an S-spring or wire, or a planar elastic body such as a cloth-like support member, as long as it can support the impact absorbing member. By adopting such a structure, it is possible to support the impact absorbing member with a simple structure.

[0061] In the example shown in Fig. 8, the bridging member 13X is a wire member. The bridging member 13X is a wire member formed in a substantially rectangular frame shape, with a front end 13Xa connected to a first connecting member 11X as a pan frame and a rear end 13b connected to a second connecting member 12X. A first spring 14Xa, which is an S-spring, is stretched between a pair of seat cushion side frames 10Xa. The second connecting member 12X is bent backward, and a second spring 14Xb, which is an S-spring, is stretched between them.

[0062] The shock absorbing member 50 is disposed on the bridging member 13X, which is a wire member, at a position between the first connecting member 11X and the first spring 14Xa in the front-rear direction. With this configuration, the shock absorbing member 50 can be easily supported by the wire member. [Explanation of symbols]

[0063] S Vehicle seats (vehicle seats) Sh seat body S1 Seat Cushion S11 seat cushion pad S12 Trim cover (skin material) S13 Slit S2 seat back S3 Headrest S4 Slide rail mechanism (support member) 10 Seat cushion frame 10a Seat cushion side frame 11 First connecting member 12 Second connecting member 13 Bridge members 13a Front end 13b Rear end 13c Bend part 13d slope part 13e flat area 13f Bead (raised part) 13g aperture 13h Regulating protrusion 20 Seat back frame 21 First connecting link 22 Second connecting link 30 Support base (support member) 40 Base cover (support member) F Storage Floor 50 Shock absorbing material 51 Top side 51a Slope 52 Bottom surface 53a front 53b Rear 54a Right side 54b Left side 10X Seat Cushion Frame 10Xa seat cushion side frame 11X First connecting member 12X Second connecting member 13X Bridge members 13Xa front end 13Xb rear end 14Xa 1st spring 14Xb 2nd Spring

Claims

1. A vehicle seat having a seat cushion and a seat back, The seat cushion includes a seat cushion frame, a seat cushion pad, and an impact absorbing member provided below the seat cushion pad, The seat cushion frame is A pair of side frames; a first connecting member that connects the pair of side frames in a width direction of the vehicle seat; a second connecting member that is disposed rearward of the first connecting member and connects the pair of side frames in a width direction of the vehicle seat; a bridging member extending in a front-rear direction of the vehicle seat and bridging the first connecting member and the second connecting member, The shock absorbing member is disposed on the bridging member, the bridging member has a front position restricting portion that restricts a front position of the impact absorbing member, The vehicle seat, wherein a length of the front position restriction portion in a width direction of the vehicle seat is shorter than a length of the impact absorbing member.

2. A vehicle seat as described in claim 1, characterized in that the length of the forward position regulating portion in the fore-and-aft direction of the vehicle seat is shorter than the length of the bridging member.

3. A vehicle seat as described in claim 1, characterized in that the forward position regulating portion abuts against the front surface of the impact absorbing member.

4. The bridging member has two raised portions extending in the fore-and-aft direction of the vehicle seat and spaced apart in the width direction of the vehicle seat, The vehicle seat according to claim 1 , wherein the front position restriction portion is disposed so as to be sandwiched between the two raised portions in the width direction of the vehicle seat.

5. The bridging member has two openings that open in the up-down direction of the vehicle seat and are spaced apart in the fore-aft direction of the vehicle seat, The vehicle seat according to claim 1 , wherein the front position restriction portion is disposed so as to be sandwiched between the two openings in the front-rear direction of the vehicle seat.

6. A vehicle seat as described in claim 1, characterized in that the forward position regulating portion is formed as a regulating protrusion protruding upward from the bridging member.

7. The bridging member includes an inclined portion inclined upward from the rear toward the front, The vehicle seat according to claim 1 , wherein the front position restriction portion is disposed on the inclined portion.

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