JP2023134380A - vehicle seat - Google Patents

Abstract

To provide a vehicle seat including a rail device which can be attached to a floor without restricting movement of an upper rail.SOLUTION: A vehicle seat S includes: a seat frame F; and rail devices 4 each comprising a lower rail 5 fixed to a floor FL, and an upper rail 6 attached to the seat frame F and slidably engaging with the lower rail 5. The lower rail 5 is fixed to the floor FL by a fastening member 52. The lower rail 5 is formed with a receded part 54 into which a fastening member 52 is sunk from a bottom part 5a of the lower rail 5 in an area immediately below the lower rail 5.SELECTED DRAWING: Figure 15

Description

The present invention relates to a vehicle seat, and more particularly to a vehicle seat equipped with a rail device.

A vehicle seat includes a seat cushion, a seat back, and a headrest, and each of the seat back and the seat cushion is provided with a seat frame that forms a skeleton thereof. Further, the vehicle seat is provided with a rail device that moves the vehicle seat in the longitudinal direction of the vehicle.
The rail device is composed of a lower rail fixed on the vehicle body floor and an upper rail that is slidable relative to the lower rail. Conventionally, as disclosed in Patent Document 1, a lower rail is provided with a bolt on the bottom surface of the front end for fixing to a vehicle floor or a bracket.

JP 2021-160408 Publication

However, in the conventional rail device, since the head of the bolt is located on the bottom surface of the lower rail, there is a problem that the upper rail and the bolt interfere with each other and the range of motion of the upper rail is restricted.
Another challenge is to improve the strength of the rail and the members around the rail.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle seat equipped with a rail device that can be attached to a floor without restricting movement of the upper rail.

According to the vehicle seat of the present invention, the problem can be solved by a seat frame, a lower rail fixed to the floor, and an upper rail attached to the seat frame and slidably engaged with the lower rail. The lower rail is fixed to the floor by a fastening member, and the lower rail has a relief portion that allows the fastening member to sink from the bottom of the lower rail directly below the lower rail. This is solved by the formation of

By forming a relief part in the bottom of the lower rail into which the fastening member is sunk, the head of the fastening member is lowered and interference with the upper rail is suppressed. Therefore, it is possible to provide a vehicle seat including a rail device that can be attached to the floor without restricting movement of the upper rail.

Further, in the above configuration, it is preferable that the escape portion is a recess formed below the lower rail, and the head of the fastening member is disposed within the recess.

By arranging the head of the fastening member within the recess, interference with the upper rail is suppressed, and inhibition of movement of the upper rail is suppressed.

Further, in the above configuration, the top of the fastening member that sinks into the relief portion may be located below the top surface of the bottom of the lower rail.

Since the top of the fastening member is located below the upper surface of the bottom of the lower rail, the movement of the upper rail is inhibited from being inhibited.

Further, in the above configuration, a through hole formed at the bottom of the lower rail and through which the fastening member is inserted, and a recess that is arranged below the through hole and holds the head of the fastening member inserted as the relief part. and a holding member having a structure, the holding member preferably being fixed by welding to a side portion of the lower rail.
By fixing the holding member to the side portion of the lower rail by welding, there is no need to interpose an adhesive member in the vertical direction, and it is possible to achieve compactness in the vertical direction.

Furthermore, in the above configuration, fixing portions for fixing the holding member to the lower rail may be provided on both sides of the lower rail.
By providing the fixing portions for fixing the holding member on both sides of the lower rail, the lower rail is sandwiched and the strength is improved.

Further, in the above configuration, the fixing portions provided on both sides of the lower rail may be provided at positions sandwiching the fastening member when viewed from above.
By providing the fixing portions at positions that sandwich the fastening member, the strength around the fastening member can be improved.

Further, in the above configuration, a cover member that covers a portion of the lower rail to which the holding member is attached is further provided, and a cover engaged portion that engages with an engaging portion of the cover member is provided on a side portion of the lower rail. It is preferable that a step portion is formed on the side surface of the holding member at a position that does not overlap with the cover engaged portion.
By providing a step portion on the side surface of the holding member that does not overlap with the cover engaged portion, attachment of the cover member is not obstructed.

Further, in the above configuration, the fixing portion may be provided near the cover engaged portion.
By providing the fixing part near the cover engaging part, the strength around the cover engaged part is improved.

Further, in the above configuration, the fixing portion may be provided at the same height as the cover engaged portion.
By providing the fixing portion at the same height as the cover engaged portion, a compact arrangement can be achieved.

Furthermore, in the above configuration, a rib that contacts a side surface of the lower rail may be formed on the inside of the cover member, and the fixing portion may be located below the rib.
By forming the rib that contacts the side surface of the lower rail on the inside of the cover member, the strength around the rib is improved.

According to the vehicle seat of the present invention, the relief portion into which the fastening member is sunk is formed at the bottom of the lower rail, so that the head of the fastening member is lowered and interference with the upper rail is suppressed. Therefore, it is possible to provide a vehicle seat including a rail device that can be attached to the floor without restricting movement of the upper rail.
In addition, by placing the head of the fastening member in the recess, interference with the upper rail is suppressed, and inhibition of movement of the upper rail is suppressed.In addition, the top of the fastening member is located below the upper surface of the bottom of the lower rail. By locating the upper rail, the movement of the upper rail is prevented from being obstructed.
Further, since the holding member is fixed to the side portion of the lower rail by welding, there is no need to interpose an adhesive member in the vertical direction, and it is possible to achieve compactness in the vertical direction.
Further, by providing fixing parts for fixing the holding member on both sides of the lower rail, the lower rail is sandwiched and the strength is improved.
Furthermore, by providing the fixing portions at positions that sandwich the fastening member, the strength around the fastening member can be improved.
Further, by providing a step portion on the side surface of the holding member that does not overlap with the cover engaged portion, attachment of the cover member is not obstructed.
Further, by providing the fixing portion near the cover engaging portion, the strength around the cover engaged portion is improved.
Further, by providing the fixing portion at the same height as the cover engaged portion, a compact arrangement can be achieved.
Further, by forming a rib that contacts the side surface of the lower rail on the inside of the cover member, the strength around the rib is improved.

FIG. 1 is a perspective view showing the appearance of the vehicle seat according to the present embodiment, viewed diagonally from the front. FIG. 3 is a perspective view of the seat frame seen diagonally from the front. FIG. 3 is a front view of the seat frame. FIG. 3 is a rear view of the seat frame. FIG. 3 is a top view of the seat frame. It is a bottom view of a seat frame. 4 is a cross-sectional view taken along line VII-VII in FIG. 3. FIG. 4 is a cross-sectional view taken along line VIII-VIII in FIG. 3. FIG. FIG. 3 is a front view showing the upper frame to which the first mounting bracket is fixed. FIG. 3 is an exploded perspective view of the first mounting bracket. FIG. 2 is a perspective view of the rail device as seen diagonally from the front. FIG. 2 is a perspective view of the rail device viewed from inside the vehicle seat. FIG. 3 is a top view showing the tip of the lower rail. FIG. 3 is a perspective view showing the tip of the lower rail. 14 is a sectional view taken along the line XV-XV in FIG. 13. FIG. FIG. 3 is an exploded perspective view of the tip portion of the lower rail. FIG. 7 is an explanatory diagram showing engagement between the tip of the lower rail and the cover member. It is a perspective view which shows the pan frame to which the 2nd blower was attached. FIG. 19 is a partially enlarged perspective view showing a portion A of FIG. 18 in an enlarged manner. FIG. 7 is a bottom view of the pan frame to which the second mounting bracket is attached, showing a state in which the second blower is removed. FIG. 7 is a perspective view showing the top side of the second mounting bracket. FIG. 7 is a perspective view showing the lower surface side of the second mounting bracket.

Hereinafter, the configuration of a vehicle seat according to an embodiment of the present invention will be described with reference to the drawings. However, the embodiments described below are for facilitating understanding of the present invention, and are not intended to limit the present invention. That is, the present invention may be modified and improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof.
Further, in the following description, the content regarding the material, shape, and size of the seat component parts is merely one specific example, and does not limit the present invention.

In the following, a vehicle seat mounted in a vehicle (hereinafter referred to as a vehicle seat S) will be cited as an example of a vehicle seat, and an example of its configuration will be described.
In addition, in the following description, the "front-back direction" refers to the front-back direction of the vehicle seat S, which coincides with the traveling direction when the vehicle is running, and may also be referred to as the "seat front-back direction." Moreover, the "seat width direction" is the width direction of the vehicle seat S, and is a direction that coincides with the left-right direction as seen from the passenger seated on the vehicle seat S. Further, the "up-down direction" refers to the up-down direction of the vehicle seat, and is a direction that coincides with the vertical direction when the vehicle is traveling on a horizontal plane. In addition, simply "outside" refers to the side closer to the outside in the direction from the center of the single vehicle seat S to the outside, and "inside" refers to the side closer to the outside in the direction from the outside to the center of the single vehicle seat S. It means the one closest to.

Note that, unless otherwise specified, the shape, position, posture, etc. of each part of the vehicle seat S will be explained assuming that the vehicle seat S is in a seated state, which will be described later.

<Vehicle seat S>
The basic configuration of the vehicle seat S according to this embodiment will be explained with reference to FIG. 1. FIG. 1 is a perspective view of a vehicle seat S, and a part of the vehicle seat S in FIG. 1 is shown with the skin material T and pad member P removed for convenience of illustration.

The vehicle seat S is placed on the floor of a vehicle, and is a seat on which a vehicle occupant (hereinafter also referred to as a seated person) sits. In this embodiment, the vehicle seat S is used as a front seat corresponding to the front seat of a vehicle. However, the vehicle seat S is not limited to this, and the vehicle seat S can also be used as a rear seat, and can also be used as a second-row middle seat or a third-row seat in a vehicle with three rows of seats in the front and rear direction. It can also be used as a rear seat.

As shown in FIG. 1, the vehicle seat S includes a seat back 1 serving as a backrest portion that supports the back of a seated person, a seat cushion 2 serving as a seating portion that supports the buttocks of the seated person, and a seat cushion 2 disposed on the top of the seat back 1. The main component is a headrest 3 that supports the head of the seated person. Note that the seat back 1, seat cushion 2, and headrest 3 may be collectively referred to as a seat body Sh.
The seat back 1 and the seat cushion 2 are connected to sandwich a reclining mechanism 7 (see FIG. 2). The reclining mechanism 7 allows the seat back 1 to rotate with respect to the seat cushion 2, and its inclination angle can be adjusted.
A headrest stay 3a extends downward from the headrest 3 and is connected to the upper end of the seat back 1.

Further, inside the vehicle seat S, a first blower 30 and a second blower 130 are provided to send air to the seated person (see FIG. 2), and a second blower 130 is provided on the seating surface of the seat back 1. A first air outlet 40 is formed to send out air sent from the first blower, and a second air outlet 140 is formed on the seating surface of the seat cushion 2 to send out air sent from the second blower 130.

<Seat frame F>
The basic structure of the seat frame F forming the skeleton of the vehicle seat S will be explained using FIGS. 2 to 6. 2 is a perspective view of the seat frame F seen diagonally from the front, FIG. 3 is a front view of the seat frame F, FIG. 4 is a rear view of the seat frame F, FIG. 5 is a top view of the seat frame F, and FIG. is a bottom view of the seat frame F.
As shown in FIGS. 2 to 6, the vehicle seat S is provided with a seat frame F, which includes a seat back frame 10 forming the frame of the seat back 1 and a seat cushion 2. The seat cushion frame 20 forms the skeleton of the seat cushion frame 20.

<Seat back frame 10>
As shown in FIG. 2, the seat back frame 10 is formed into a rectangular frame shape as a whole, and the seat back frame 10 includes a pair of back side frames 11, 11 arranged on the left and right, an upper frame 12, and a lower frame. A frame 13 is provided. The upper frame and lower frame 13 correspond to the connection frame of the present invention. The upper frame 12 is formed into a plate shape, is disposed between the pair of backside frames 11, 11, and connects the upper ends of the pair of backside frames 11, 11. The lower frame 13 is disposed between the pair of backside frames 11, 11, and connects the lower ends of the pair of backside frames 11. Furthermore, a connection frame (not shown) that connects the pair of backside frames 11, 11 may be provided between the upper frame 12 and the lower frame 13.

The upper frame 12 is provided with a pair of headrest holders 14 into which the headrest stays 3a of the headrest 3 are inserted. The headrest holder 14 is formed as a high-strength metal member in order to maintain the holding strength of the headrest 3 and suppress rattling. Note that the headrest holder 14 is not limited to metal, and may be made of resin.
Further, a first blower 30 is attached to the upper frame 12 via a first mounting bracket 31. The configuration for attaching the first blower 30 to the upper frame 12 and the first mounting bracket 31 will be described in detail after other configurations are explained.

The pair of back side frames 11, 11 are arranged on the left and right sides of the seat back frame 10, as described above, and are basically members having a left-right symmetrical structure. The pair of backside frames 11, 11 are provided to extend in the seat vertical direction. The width of each of the pair of back side frames 11, 11 in the seat longitudinal direction is formed to increase from the upper side of the seat toward the lower side of the seat. The peripheral edge on the front side of the seat and the peripheral edge on the rear side of the seat are formed in a curved shape so as to be convex toward the front side of the seat.

<Seat cushion frame 20>
As shown in FIG. 3, the seat cushion frame 20 is formed into a rectangular frame shape when viewed from above, and a pair of cushion side frames 21, 21 (a pair of side frames) are provided on the left and right sides. The pair of cushion side frames 21, 21 are basically symmetrical members and are provided extending in the front-rear direction of the seat.

The seat cushion frame 20 also includes a front connection frame 22 that connects the pair of cushion side frames 21 and 21 on the front side, and a rear connection frame 23 that connects the pair of cushion side frames 21 and 21 on the rear side. The front connection frame 22 and the rear connection frame 23 are made of round pipes. Furthermore, a plate-shaped pan frame 24 is provided in front of the front connection frame 22. A second blower 130 is attached to the pan frame 24 via a second attachment bracket 131. Details of the second blower 130 and the second mounting bracket 131 will be described in detail after other configurations are explained.
As shown in FIGS. 2 and 5, the seat cushion frame 20 is provided with a pressure receiving member 25 disposed to bridge between the front connection frame 22 and the rear connection frame 23. It is possible to support the buttocks of

<Rail device 4>
Furthermore, a rail device 4 is installed at the bottom of the vehicle seat S, as shown in FIG. By means of this rail device 4, the vehicle seat S is attached to the vehicle body floor FL in a state where the seat body Sh is slidable in the front-rear direction.

The rail device 4 includes a lower rail 5 fixed on the vehicle body floor FL and an upper rail 6 that is slidable relative to the lower rail 5. The configuration for fixing the lower rail 5 to the vehicle body floor FL will be described later.

<Pad member P and skin material T>
The seat back 1 and the seat cushion 2 are configured by providing a pad member P and a skin material T (cushion cover) on the outside of the seat back frame 10 and the seat cushion frame 20. The pad member P is a urethane base material formed by foam molding using, for example, a urethane foam material, and the skin material T is made of, for example, cloth, synthetic leather, genuine leather, or the like.

Hereinafter, the seat back frame 10 included in the vehicle seat S of this embodiment will be described in more detail. 7 is a cross-sectional view taken along line VII-VII in FIG. 3, and FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. FIG. 9 is a front view of the upper frame 12 to which the first mounting bracket 31 is fixed, and shows a state in which the first blower 30 is removed. FIG. 10 is an exploded perspective view of the first mounting bracket 31. As shown in FIG.

The seat back frame 10 includes the plate-shaped upper frame 12 as described above. Further, a first blower 30 is attached to the upper frame 12, which is attached to the surface 12a on the side of the seated person.

Conventionally, when attaching a functional component such as a blower to the upper frame, the blower has been attached below the upper frame so that the blower does not protrude forward (see, for example, Japanese Patent Application Laid-Open No. 2019-6392). Therefore, there was a problem that the mounting position of the blower was limited.

In the vehicle seat S according to the present embodiment, as shown in FIG. 7, a recess 15 is formed in the surface 12a of the upper frame 12 on the seated person's side to allow the first blower 30 to sink in the direction away from the seated person. There is. In other words, the upper frame 12 is formed with a recess 15 that positions the first blower 30 further to the rear side. The recessed portion 15 corresponds to the escape portion of the present invention.
The recess 15 is formed by bending the plate-shaped upper frame 12, and the first blower 30 is disposed within the recess 15. Thereby, the first blower 30 can be arranged compactly without protruding forward even at a position overlapping the upper frame 12 in the front-rear direction.

The first blower 30 is fixed to the upper frame 12 in the recess 15 of the upper frame 12 via a plate-shaped first mounting bracket 31 (mounting member).
A first bracket fixing portion 16 for fixing the first mounting bracket 31 is formed in the recess 15 of the upper frame 12 . The first bracket fixing part 16 corresponds to the mounting member fixing part of the present invention.

The first bracket fixing part 16 includes an upper bracket fixing part 16a located on the upper side and a lower bracket fixing part 16b located on the lower side. The upper bracket fixing part 16a and the lower bracket fixing part 16b located on the lower side have forwardly protruding flat parts formed as pedestals on which the first mounting bracket 31 is attached. The upper bracket fixing portion 16a is fastened and fixed to the upper connecting portion 38a of the first mounting bracket 31 by bolts 39. Further, the lower bracket fixing portion 16b is fastened and fixed to the lower connecting portion 38b of the first mounting bracket 31 with a bolt 39. Note that although bolts 39 are used as fastening members, tapping screws may also be used.

By providing the first bracket fixing portion 16 on the upper frame 12, the workability of attaching the first blower 30 is improved. Further, a bead portion 18 projecting rearward is formed between the upper bracket fixing portion 16a and the lower bracket fixing portion 16b, and the recess 15 of the upper frame 12 is reinforced.

<First mounting bracket 31>
A first mounting bracket 31 is used to fix the first blower 30 to the recess 15 of the upper frame 12. The first mounting bracket 31 is a resin member, and as shown in FIG. 10, a storage recess 31c and an opening 31d for storing the first blower 30 are formed. The first mounting bracket 31 has a first frame connecting portion 38 that connects to the first bracket fixing portion 16 of the upper frame 12 .

More specifically, the upper end portion 31a of the first mounting bracket 31 is formed with one upper connecting portion 38a that connects to the upper bracket fixing portion 16a of the upper frame 12.
Furthermore, two lower connecting portions 38b are formed in the storage recess 31c of the first mounting bracket 31 to connect to the lower bracket fixing portion 16b of the upper frame 12. The two lower connecting parts 38b are arranged at the left and right ends of the storage recess 31c.
The upper connecting portion 38a corresponds to the first connecting portion of the present invention, and the lower connecting portion 38b corresponds to the second connecting portion of the present invention.
The first mounting bracket 31 is attached to the upper frame 12 at three points: one point on the upper connecting portion 38a and two points on the lower connecting portion 38b, so it can be firmly fixed by a simple method. I can do it.

<Grommet 51>
As described above, the first mounting bracket 31 has the upper connecting portion 38a and the lower connecting portion 38b fastened to the first bracket fixing portion 16 of the upper frame 12 with the bolt 39. Since the first mounting bracket 31 is made of resin, it may be damaged if the bolt 39 comes into direct contact with it. Therefore, grommets 51 are attached to the upper connecting portion 38a and the lower connecting portion 38b.

As shown in FIG. 10, the grommet 51 is a clip-shaped member, and is attached by sandwiching the upper connecting portion 38a or the lower connecting portion 38b. The grommet 51 is formed with a through hole 51a that communicates with an insertion hole into which the bolt 39 is inserted when attached to the upper connecting portion 38a or the lower connecting portion 38b. By applying the grommet 51 around the bolt insertion hole, the upper connecting portion 38a and the lower connecting portion 38b can be protected. Moreover, the grommet 51 strengthens the fixing force of the upper connecting part 38a and the lower connecting part 38b, making assembly easier. The grommet 51 is inserted from the outside of the first mounting bracket 31 and can be attached by sandwiching the upper connecting part 38a and the lower connecting part 38b, so that the grommet 51 can be easily attached and removed. .

<Positioning part 34>
As shown in FIG. 10, positioning portions 34 are provided on the left and right sides of the upper connecting portion 38a in the seat width direction. The positioning portion 34 has a T-shaped cross section and stands upright toward the rear. A T-shaped insertion hole 17 is formed in the upper bracket fixing part 16a of the upper frame 12 at a position corresponding to the positioning part 34 (see FIG. 4). After inserting the head part 34a of the positioning part 34 into the insertion hole 17, by fitting the support part 34b of the positioning part 34 into the recess of the insertion hole 17, before fastening and fixing the first mounting bracket 31 with the bolt 39, It can be temporarily fixed to the upper frame 12. Temporary fixing facilitates positioning of the first mounting bracket 31 and improves installation workability.

The upper portion of the first mounting bracket 31 is arranged between the headrest holders 14, 14 of the upper frame 12, as shown in FIG. In other words, the size W of the first mounting bracket 31 main body in the seat width direction is formed to fit between the headrest holders 14, 14. By arranging the first mounting bracket 31 between the pair of headrest holders 14, 14, the first mounting bracket 31 does not protrude toward the front side of the seat. ) can be made compact.

Further, the upper connecting portion 38a of the first mounting bracket 31 is sandwiched between the headrest holders 14, 14 in the seat width direction. On the other hand, the lower connecting portion 38b is not sandwiched between the headrest holders 14, 14 in the seat width direction.
By arranging the upper connecting portion 38a between the headrest holders 14, 14, the fixing strength can be improved. Since the grommet 51 is attached from the side to the lower connecting portion 38b, the lower connecting portion 38b is not disposed between the headrest holders 14, 14, so that the headrest holders 14, 14 can easily attach the grommet 51. The first mounting bracket 31 can be easily assembled without getting in the way.

<Connector support part 33>
The first mounting bracket 31 has a connector support portion 33 that supports a connector 49 connected to the first blower 30 at the lower end 31b of the first mounting bracket 31. The connector support portions 33 are provided on both the left and right sides of the lower end portion 31b of the first mounting bracket 31. More specifically, the connector support portion 33 is provided in a tongue shape so as to extend outward and diagonally downward from the left and right sides of the lower end portion 31b of the first mounting bracket 31. The connector support part 33 is configured to extend outward and diagonally downward, so that it is located below the lower end of the upper frame 12.

By providing the connector support portion 33 on the first mounting bracket 31, the connector 49 can be easily mounted, and the workability of mounting the first blower 30 is improved. Furthermore, by providing the connector support portions 33 on both the left and right sides, the connector 49 can be attached using the connector support portions 33 located close to the harness 50, regardless of whether the vehicle seat S is placed on the left or right side of the vehicle. , the first mounting bracket 31 can be shared between the left and right seats. Further, by being disposed below the lower end of the upper frame 12, interference with the upper frame 12 is suppressed.

<First blower fixing part 32>
As shown in FIG. 9, the first mounting bracket 31 is provided with four first blower fixing parts 32 on the surface facing the seated person. The first blower fixing section corresponds to the functional component fixing section of the present invention. The first blower fixing part 32 is arranged near the four corners of the first mounting bracket 31, and the two upper blower fixing parts 32a arranged above are arranged at positions sandwiching the upper connecting part 38a. In other words, the upper connecting portion 38a is sandwiched between the two upper blower fixing portions 32a.
Further, the two lower blower fixing parts 32b arranged below the first mounting bracket 31 are arranged near the lower connecting part 38b. In other words, the two lower connecting parts 38b are arranged adjacent to the lower blower fixing part 32b. By arranging the upper connecting portion 38a and the lower connecting portion 38b in this manner, the fixing strength is improved.

In the present embodiment, the recess 15 is formed in the upper frame 12 as the escape part of the present invention, but the invention is not limited to this, and the escape part may be a through hole formed in the upper frame 12. By inserting and sinking the first blower 30 into the through hole and fixing it, it is possible to suppress the first blower 30 from protruding forward.

Further, the frame in which the recessed portion 15 (relief portion) for attaching the first blower 30 is formed is not limited to the upper frame 12, but may be the lower frame 13 disposed below the seat back frame 10, or the connecting frame provided in the center. (not shown). Further, the functional component attached to the recess 15 is not limited to the first blower 30, but may be a sensor that acquires biological information of the seated person, or may be a vibrator, a heater, a speaker, or an air cell. .

Next, the rail device 4 of the vehicle seat S according to this embodiment will be explained with reference to FIGS. 11 to 17. 11 is a perspective view of the rail device 4 seen diagonally from the front, and FIG. 12 is a perspective view of the front end of the rail device 4 seen from inside the vehicle seat S. 13 is a top view showing the tip of the lower rail 5, FIG. 14 is a perspective view showing the tip of the lower rail 5, FIG. 15 is a sectional view taken along line XV-XV in FIG. 13, and FIG. 16 is a top view of the tip of the lower rail 5. 5 is an exploded perspective view of the tip portion of No. 5. FIG. FIG. 17 is an explanatory diagram showing the engagement between the tip of the lower rail 5 and the cover member 57.

As described above, the rail device 4 includes the lower rail 5 fixed on the vehicle floor FL and the upper rail 6 attached to the seat frame F and slidably engaged with the lower rail 5. Further, the upper rail 6 is provided with a connecting bracket 60 that is connected to the seat frame F, and by sliding the upper rail 6 in the front-rear direction, the seat body Sh of the vehicle seat S can be moved in the front-rear direction. It is configured.

Conventionally, the lower rail has been fixed to the vehicle floor by directly attaching fastening members such as bolts to the bottom of the lower rail (see Japanese Patent Application Laid-Open No. 2021-160408). However, since the bolt head is located at the bottom of the lower rail, the upper rail and the bolt head may interfere with each other, and the range of motion of the upper rail may be restricted. Furthermore, since the through holes are formed at the bottom of the lower rail, it has also been a challenge to improve the rail and the members around the rail.

As shown in FIG. 15, the lower rail 5 of the vehicle seat S according to the present embodiment is fixed to the vehicle floor FL with bolts 52 (fastening members). A recessed portion 54 (relief portion) is formed into which the recessed portion 54 is sunk from the bottom portion 5a of the portion 5. In other words, the lower rail 5 is provided with a recess 54 that positions the bolt 52 below the bottom 5a of the lower rail 5.

More specifically, as shown in FIG. 13, an opening 5b through which a head 52a of a bolt 52 is inserted is formed in the bottom 5a of the tip of the lower rail 5. The opening 5b is formed in a circular shape, and the diameter R1 of the opening 5b is larger than the diameter R2 of the head of the bolt 52.

A holding member 53 that holds the head 52a of the inserted bolt 52 is attached below the bottom portion 5a. A recess 54 is formed in the bottom 53a of the holding member 53, and the head 52a of the bolt 52 is arranged within the recess 54 when the lower rail 5 is fixed.
With the head 52a disposed within the recess 54, the bolt 52 is sunk below the bottom 5a of the lower rail 5, and the top 52b of the bolt 52 is positioned below the top surface of the bottom 5a of the lower rail 5. become.

<Holding member 53>
The holding member 53 is a metal member formed by bending a plate-like member. As shown in FIG. 15, a circular recess 54 is formed in the center of the bottom 53a of the holding member 53 when viewed from above. A through hole 54a is formed in the center of the recess 54, through which the shaft of the bolt 52 is inserted.

The holding member 53 has a U-shaped cross section as a whole, and the lower rail 5 is sandwiched between the bent side portions 53b, 53b, and in this state, the holding member 53 can be attached to the bottom portion 5a of the lower rail 5. .
The holding member 53 attached to the bottom portion 5a of the lower rail 5 is fixed to the side portion 5c of the lower rail 5 by welding. In other words, both side portions 53b, 53b of the holding member 53 are fixed to both side portions 5c, 5c of the lower rail 5 by welded holding member fixing portions 56. By arranging the holding member fixing portion 56 in this manner, the lower rail 5 can be made more compact and its strength can be improved.

Further, as shown in FIG. 13, the two holding member fixing parts 56 are arranged at positions sandwiching the bolt 52 in a top view. By arranging the two holding member fixing parts 56 so as to sandwich the bolt 52, the strength of the vicinity of the bolt 52 is improved.

Furthermore, a stepped portion 53c formed by a notch is formed on the side portion 53b of the holding member 53 at a position corresponding to the cover engaged portion 5d of the lower rail 5. By forming the stepped portion 53c, the cover engaged portion 5d is not covered by the side portion 53b, and engagement with a cover member 57, which will be described later, is not inhibited.

Further, the holding member fixing portion 56 is provided near the cover engaged portion 5d. By providing the holding member fixing portion 56 near the cover engaged portion 5d, the strength can be improved. Furthermore, the holding member fixing portion 56 and the cover engaged portion 5d are provided at substantially the same height, allowing for a compact arrangement.

<Cover member 57>
A cover member 57 is provided at the tip of the lower rail 5 to cover the portion of the lower rail 5 to which the holding member 53 is attached. The cover member 57 is a member made of resin, and is formed so that its cross section is approximately U-shaped.
A through hole 57c into which the recess 54 of the holding member 53 is inserted is formed at the bottom of the cover member 57.

Further, on the inside of the cover member 57, a claw-shaped engaging portion 57a extending rearward from the tip is formed. Furthermore, a cover engaged portion 5d is formed at the tip of the lower rail 5 at a position corresponding to the engaging portion 57a. As shown in FIG. 17, when the cover member 57 is attached, the engaging portion 57a engages with the cover engaged portion 5d of the lower rail 5, so that the cover member 57 can be fixed.

Further, the side surface of the cover member 57 has a bulge that bulges outward so as to accommodate the holding member fixing portion 56. Ribs 57b are formed inside the bulge. The rib 57b is provided so that the tip of the rib 57b comes into contact with the side surface of the lower rail 5 when the cover member 57 is attached. Further, the rib 57b is attached so as to be located above the holding member fixing portion 56. By positioning the holding member fixing portion 56 below the rib 57b, the strength of the cover member 57 is improved.

<Connection bracket 60 and link 61>
As shown in FIG. 11, a connecting bracket 60 is provided on the upper rail 6 that slides on the lower rail 5. As shown in FIG. Further, as shown in FIG. 12, a plurality of links 61 that are connected to the cushion side frames 21, 21 of the seat cushion frame 20 are rotatably attached to the connection bracket 60. By rotating the link 61, the height of the seat cushion 2 can be changed.

The connection bracket 60 of this embodiment includes a bottom portion 60a that connects to the upper rail 6, and a wall portion 60b that stands up from the periphery of the bottom portion 60a. Further, a flange 60c extending outward in the seat width direction is formed at the upper end of the wall portion 60b. By forming the flange 60c, the strength around the rail is improved.
Further, as shown in FIG. 12, the link 61 is also formed with a flange 61b extending inward in the seat width direction from the side of the link body 61a, thereby improving the strength around the rail.

Next, the seat cushion frame 20 included in the vehicle seat S according to this embodiment will be explained using FIGS. 18 to 22. FIG. 18 is a perspective view showing the pan frame 24 to which the second blower 130 is attached, and FIG. 19 is a partially enlarged perspective view showing part A of FIG. 18 on an enlarged scale. FIG. 20 is a bottom view of the pan frame to which the second mounting bracket 131 is attached, with the second blower 130 removed. FIG. 21 is a perspective view showing the top side of the second mounting bracket 131, and FIG. 22 is a perspective view showing the bottom side of the second mounting bracket 131.

Conventionally, when attaching a functional component such as a blower to a seat cushion frame, the functional component is not directly attached but is attached via a mounting bracket. The mounting bracket is fastened and fixed to the seat frame using a fastening member such as a bolt, but before being fastened and fixed, it is usually temporarily fastened to the seat frame using a locking claw or the like. In the vehicle seat disclosed in Japanese Unexamined Patent Publication No. 2021-112586, the mounting bracket is temporarily fixed using one locking pawl and then fastened and fixed.
However, with one locking pawl, the accuracy and holding force of temporary locking when temporarily locking the mounting bracket are low, and there is a possibility that the ease of assembly may be deteriorated.

The vehicle seat S according to this embodiment includes a second blower 130, as shown in FIGS. 5, 6, and 19. The second blower 130 is attached to the pan frame 24. The second blower 130 is a device that blows air to the seated person, and corresponds to a functional component of the present invention. The air sent out from the second blower 130 is sent to the second air outlet 140 of the seat cushion 2 through a duct 130a provided inside the seat cushion 2.

The vehicle seat S includes a second mounting bracket 131 that is fixed to the second blower 130 and attaches the second blower 130 to the pan frame 24. The second mounting bracket 131 is a resin member formed into a plate shape as a whole, and has an opening 137 in the center through which the duct 130a extending from the second blower 130 is inserted, as shown in FIGS. 21 and 22. has been done.

The second mounting bracket 131 is fastened and fixed to the pan frame 24 of the seat cushion frame 20 using a plurality of bolts 139 (a plurality of fastening members). Although bolts 139 are used as the fastening members, tapping screws may be used for fastening and fixing.
As shown in FIG. 21, the second mounting bracket 131 has a plurality of temporary fixing parts 135 for temporarily fixing the second mounting bracket 131 to the pan frame 24, and as shown in FIG. The section 135 is arranged at a position sandwiching the second blower 130. The second mounting bracket 131 is temporarily fixed to the pan frame 24 by a plurality of temporary fixing parts 135 before being fastened and fixed to the pan frame 24 by bolts 139. In this way, by arranging the plurality of temporary fixing parts 135 so that the second blower 130 is sandwiched between them, the temporary fixing accuracy and holding force around the second blower 130 are improved, and ease of assembly is improved. be able to.

As shown in FIG. 21, the temporary fixing portion 135 has a claw-shaped tip. The second mounting bracket 131 can be temporarily fixed to the pan frame 24 by inserting the temporary fixing portion 135 into the insertion hole of the pan frame 24 formed at the corresponding position and hooking the tip.

Two temporary fixing parts 135 are arranged on each side of the second blower 130 in the sheet width direction. The two temporary fixing parts 135 arranged on the left side of the second blower 130 are arranged side by side in the front-rear direction of the seat. Two temporary fixing portions 135 disposed on the right side of the second blower 130 are also disposed side by side in the seat front-rear direction.
In this embodiment, two temporary fixing parts 135 are provided on each of the left and right sides of the second blower 130, but the present invention is not limited to this, and one temporary fixing part 135 may be provided on each of the left and right sides. Three or more temporary fixing parts 135 may be provided on each of the left and right sides.
By arranging them on the left and right, a compact arrangement can be achieved. Further, by arranging them in the front-rear direction, the temporary fixing accuracy is improved.

The pan frame 24 is formed with a duct insertion portion 24a through which the duct 130a of the second blower 130 is inserted. The duct insertion portion 24a is a through hole formed in the pan frame 24.
Further, the pan frame 24 is provided with a second bracket fixing portion 26 for fixing the second mounting bracket 131. The second bracket fixing part 26 includes a left bracket fixing part 26a formed on the left side of the duct insertion part 24a, and a right bracket fixing part 26b formed on the right side. The left bracket fixing part 26a and the right bracket fixing part 26b are formed as downwardly recessed parts. The plurality of temporary fixing parts 135 of the second mounting bracket 131 are inserted into through holes formed in the second bracket fixing part 26 and latched.

The second mounting bracket 131 has a second frame connecting portion 138 that connects to the second bracket fixing portion 26 of the pan frame 24 .
More specifically, as shown in FIG. 20, the right side portion of the second mounting bracket 131 is provided with one right side connection portion 138b that connects to the right side bracket fixing portion 26b of the pan frame 24. Further, on the left side portion of the second mounting bracket 131, two left side connecting portions 138a that are connected to the left side bracket fixing portion 26a of the pan frame 24 are provided side by side in the seat front-rear direction.
The second mounting bracket 131 is attached to the pan frame 24 at three points: one point on the right side connection part 138b and two points on the left side connection part 138a, so it can be firmly fixed by a simple method. can.

<Grommet 151>
As described above, the second mounting bracket 131 has the left connecting portion 138a and the right connecting portion 138b fastened to the second bracket fixing portion 26 of the pan frame 24 with the bolt 139. Since the second mounting bracket 131 is made of resin, it may be damaged if the bolt 139 comes into contact with it. Therefore, grommets 151 are attached to the left connecting portion 138a and the right connecting portion 138b. The configuration of the grommet 151 is similar to that of the grommet 51 provided on the first mounting bracket 31, so a detailed explanation will be omitted.

By applying the grommet 151 around the bolt insertion holes of the left side connection part 138a and the right side connection part 138b, the left side connection part 138a and the right side connection part 138b can be protected. Furthermore, the fixing force of the left connecting portion 138a and the right connecting portion 138b is strengthened, and assembly is facilitated.
Note that the temporary fixing portion 135 is arranged at a position avoiding the grommet 151, that is, at a position where the grommet 151 is not provided. This improves ease of installation.

As shown in FIG. 18, the temporary fixing portion 135 disposed on the right side of the second mounting bracket 131 is disposed at a position sandwiching the bolt 139 fastened at the right side connecting portion 138b. This arrangement improves the accuracy of temporary fixing.
Further, the temporary fixing portion 135 disposed on the left side is disposed at a position sandwiched between two bolts 139 fastened at the left side connecting portion 138a. By arranging the temporary fixing portions 135 in this manner, it is possible to fix more firmly.

<Connector support part 133>
As shown in FIG. 20, the second mounting bracket 131 has a connector support portion 133 that supports the connector 49 connected to the second blower 130 at the rear end 131b of the first mounting bracket 31. The connector support portions 133 are provided on both the left and right sides of the rear end portion 131b of the second mounting bracket 131. A connector 49 is attached to the connector support portion 133, and a harness 50 extending from the connector 49 is connected to a power source, an ECU, etc. of the vehicle. The harness 50 is fixed to the lower surface of the second mounting bracket 131 with a clip 58.

By providing the connector support portion 33 on the second mounting bracket 131, the connector 49 can be easily mounted, and the workability of mounting the second blower 130 can be improved. In addition, by providing the connector support portions 33 on both the left and right sides, even if the vehicle seat S is placed on either the left or right side of the vehicle, the connector support portion 33 located close to the harness 50 extending from the power source etc. can be used to connect the connector 49. can be attached. Therefore, the second mounting bracket 131 can be shared between the left and right seats. Further, the connector support portion 133 is provided at a position avoiding the temporary fixing portion 135. This improves the ease of installation.

As described above, the second mounting bracket 131 has an opening 137 formed in the center thereof through which the duct 130a of the second blower 130 is inserted.
The plurality of temporary fixing parts 135 provided on the second mounting bracket 131 are arranged at positions sandwiching the opening 137. By arranging a plurality of temporary fixing parts 135 in this manner, it is possible to improve the accuracy of temporary fixing and also to improve the strength. Further, by providing the temporary fixing portions 135 on the left and right sides of the duct insertion portion 24a, a compact arrangement can be achieved.

<Rib 131d>
As shown in FIG. 21, the lower surface 131c of the second mounting bracket 131 is provided with a rib 131d that projects downward. In particular, a portion of the rib 131d is formed in a circular shape so as to surround the opening 137, thereby improving the rigidity around the opening 137.

<Second blower fixing part 132>
Further, as shown in FIGS. 19 and 21, a second blower fixing part 132 (functional component fixing part) for fixing the second blower 130 to the second mounting bracket 131 is provided on the lower surface 131c of the second mounting bracket 131. is provided. In this embodiment, four second blower fixing parts 132 are provided around the opening 137.

<Guide part 136>
The second mounting bracket 131 includes a guide portion 136 that guides the temporary fixing portions 135 when the plurality of temporary fixing portions 135 are temporarily attached. The guide portion 136 is a columnar member that stands up from the upper surface 131a of the second mounting bracket 131, and one guide portion 136 is provided on each side of the duct insertion portion 24a.
Further, the guide portion 136 is provided near at least one of the plurality of temporary fixing portions 135. In particular, the guide part 136 provided on the left side is arranged between two temporary fixing parts arranged in front and behind. By providing the guide portion 136 near the temporary fixing portion 135 or disposing it between the temporary fixing portions 135, temporary fixing is facilitated.

In this embodiment, the second mounting bracket 131 is attached to the pan frame 24 of the seat cushion frame 20, but the second mounting bracket 131 may be attached to the upper frame 12 or lower frame 13 of the seat back frame 10. . In this case, the plurality of temporary fixing parts 135 arranged on the left or right side of the opening 137 through which the duct is inserted are arranged in the vertical direction of the vehicle seat S.

Further, the functional component attached to the pan frame 24 is not limited to the second blower 130, and may be a sensor that acquires biological information of the seated person. Further, the functional component may be a vibration device, a heater, a speaker, or an air cell.

S Vehicle seat F Seat frame T Skin material P Pad member FL Vehicle floor 1 Seat back 2 Seat cushion 3 Headrest 3a Headrest stay 4 Rail device 5 Lower rail 5a Bottom 5b Opening 5c Side 5d Cover engaged portion 6 Upper rail 7 Reclining mechanism 10 Seat back frame 11 Back side frame (side frame)
12 Upper frame (connection frame)
12a Seated person side surface 13 Lower frame 14 Headrest holder 15 Recess 16 First bracket fixing part (mounting member fixing part)
16a Upper bracket fixing part 16b Lower bracket fixing part 17 Insertion hole 18 Bead part 20 Seat cushion frame 21 Cushion side frame (side frame)
22 Front connection frame 23 Rear connection frame 24 Pan frame 24a Duct insertion part 25 Pressure receiving member 26 Second bracket fixing part (mounting member fixing part)
26a Left side bracket fixing part 26b Right side bracket fixing part 30 First blower (functional part)
31 First mounting bracket (mounting member)
31a Upper end 31b Lower end 31c Storage recess 31d Opening 32 First blower fixing part (functional component fixing part)
32a Upper blower fixing part 32b Lower blower fixing part 33 Connector support part 34 Positioning part 34a Head 34b Support column 38 First frame connection part 38a Upper connection part (first connection part)
38b Lower connection part (second connection part)
39 Bolt (fastening member)
40 First ventilation port 49 Connector 50 Harness 51 Grommet 52 Bolt (fastening member)
52a Head 52b Top 53 Holding member 53a Bottom 53b Side 53c Step 54 Recess (recess)
54a Through hole 56 Holding member fixing part 57 Cover member 57a Engaging part 57b Rib 57c Through hole 58 Clip 60 Connection bracket 60a Bottom part 60b Wall part 60c Flange 61 Link 61a Link body 61b Flange 130 Second blower (functional parts)
130a Duct 131 Second mounting bracket (mounting member)
131a Upper surface 131b Rear end 131c Lower surface 131d Rib 132 Second blower fixing part (functional component fixing part)
133 Connector support part 135 Temporary fixing part 136 Guide part 137 Opening part 138 Second frame connection part 138a Left side connection part 138b Right side connection part 139 Bolt (fastening member)
140 2nd ventilation port

Claims (10)

seat frame and
A rail device comprising a lower rail fixed to a floor, and an upper rail attached to the seat frame and slidably engaged with the lower rail,
The lower rail is fixed to the floor by a fastening member,
The vehicle seat is characterized in that the lower rail is formed with a relief portion directly below the lower rail into which the fastening member is sunk from the bottom of the lower rail. The vehicle seat according to claim 1, wherein the relief portion is a recess formed below the lower rail, and a head of the fastening member is disposed within the recess. 2. The vehicle seat according to claim 1, wherein a top portion of the fastening member that sinks into the relief portion is located below an upper surface of a bottom portion of the lower rail. a through hole formed at the bottom of the lower rail, through which the fastening member is inserted;
a holding member disposed below the through hole and having a recess for holding the head of the fastening member inserted as the relief portion;
2. The vehicle seat according to claim 1, wherein the holding member is fixed to a side portion of the lower rail by welding. 5. The vehicle seat according to claim 4, wherein fixing portions for fixing the holding member to the lower rail are provided on both sides of the lower rail. 6. The vehicle seat according to claim 5, wherein the fixing portions provided on both sides of the lower rail are provided at positions sandwiching the fastening member when viewed from above. further comprising a cover member that covers a portion of the lower rail to which the holding member is attached,
A cover engaged portion that engages with an engaging portion of the cover member is formed on a side portion of the lower rail;
6. The vehicle seat according to claim 5, wherein a step portion is formed on a side surface of the holding member at a position that does not overlap with the cover engaged portion. 8. The vehicle seat according to claim 7, wherein the fixing part is provided near the cover engaged part. 9. The vehicle seat according to claim 8, wherein the fixing part is provided at the same height as the cover engaged part. A rib that comes into contact with a side surface of the lower rail is formed on the inside of the cover member,
The vehicle seat according to claim 7, wherein the fixing portion is located below the rib.

Images