JP6734555B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat including left and right side frames.

Vehicle seats mounted on automobiles and the like have left and right side frames. For example, in the seat device of Patent Document 1, the frame of the seat back includes a pair of left and right side frames extending in the up-down direction. In addition, the seat device of Patent Document 1 further includes a back plate disposed between the left and right side frames and a swing mechanism that swings the back plate, and drives the swing mechanism to change the orientation of the back plate. It can be changed left and right.

JP, 2013-49356, A

By the way, in recent years, many devices such as the above-described swinging mechanism have been provided in the vehicle seat, so that it is desired to effectively use the space.

Therefore, an object of the present invention is to provide a vehicle seat that can effectively use a space.
Another object of the present invention is to protect a device provided in a vehicle seat.
Another object of the present invention is to make the mounting structure of the device simple.
Another object of the present invention is to prevent the vehicle seat from increasing in size and to improve the rigidity of the side frame.
The invention also aims to make the device work well.

In order to achieve the above-mentioned object, a vehicle seat of the present invention is a vehicle seat that includes left and right side frames that form left and right frames, and includes a first device for moving a movable portion of the vehicle seat. , At least one of the left and right side frames is a plate-shaped side portion that is long in the up-down direction and has the first device attached to the inside in the left-right direction, and from both end portions in the front-rear direction of the side portion inward in the left-right direction It is characterized by having an inner extending portion that extends and an outer extending portion that extends outward in the left-right direction from both end portions of the side portion in the front-rear direction.

With such a configuration, the first device is arranged in the concave portion formed by the side portion of the side frame and the inner extending portion, so that the space can be effectively used. In addition, the inner extending portion can protect the first device provided in the vehicle seat.

The vehicle seat described above may be configured to include a second device attached to the outside of the side portion in the left-right direction.

According to this, since the second device is arranged in the recess formed by the side portion of the side frame and the outer extending portion, the space can be used more effectively. Further, the second device provided on the vehicle seat can be protected by the outer extending portion.

In the vehicle seat described above, the first device and the second device may be arranged so as to be displaced in the vertical direction.

According to this, components for attaching the first device and the second device to the side portion are less likely to interfere with each other, and such components and the first device and the second device are less likely to interfere with each other. The mounting structure of can be a simple structure.

In the vehicle seat described above, the side portion has a first portion to which the first device is attached and a second portion to which the second device is attached, and the second portion corresponds to the first portion. On the other hand, it may be arranged to be displaced inward in the left-right direction.

According to this, while effectively utilizing the space, it is possible to suppress an increase in the size of the vehicle seat due to the second device being arranged on the outer side in the left-right direction of the side frame. Moreover, the rigidity of the side frame can be improved.

In addition, in the above-described vehicle seat, the first device and the second device may be arranged so as to overlap each other when viewed in the left-right direction.

According to this, the space can be used more effectively.

In the above vehicle seat, the first device may be an actuator that moves a movable portion of a seat back, and the second device may be an airbag device.

According to this, since the airbag device as the second device is arranged on the outer side in the left-right direction of the side frame, the bag body can be supported by the side portion when the bag body is deployed, and the bag body can be well deployed. Can be made. That is, the second device can be operated well.

According to the present invention, the space can be effectively used. Further, the first device provided on the vehicle seat can be protected.

Further, according to the present invention, the space can be used more effectively by mounting the second device on the lateral outside of the side portion. Further, the second device provided on the vehicle seat can be protected.

Further, according to the present invention, by disposing the first device and the second device in a vertically offset manner, it is possible to simplify the mounting structure of the first device and the second device.

Further, according to the present invention, by arranging the second portion of the side portion so as to be displaced inward in the left-right direction with respect to the first portion, it is possible to effectively use the space while suppressing an increase in the size of the vehicle seat. The rigidity of the side frame can be improved.

Further, according to the present invention, by arranging the first device and the second device so as to overlap each other when viewed in the left-right direction, the space can be used more effectively.

Further, according to the present invention, the first device is an actuator that moves the movable portion of the seat back, and the second device is an airbag device, so that the second device can be operated well.

1 is a perspective view of a vehicle seat as a vehicle seat according to an embodiment. It is a perspective view of a seat back frame built into a vehicle seat. It is a perspective view of a drive mechanism on the right side. It is sectional drawing which cut|disconnected the right side frame by the surface orthogonal to the front-back direction. It is the AA sectional view (a) and BB sectional view (b) of FIG. It is explanatory drawing (a)-(c) of operation|movement of the vehicle seat S. It is sectional drawing which cut|disconnected the right side frame which concerns on a modification by the surface orthogonal to the front-back direction. It is sectional drawing equivalent to the AA cross section of FIG. 4 of the side frame which concerns on another modification.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the present invention, front, rear, left and right, and upper and lower sides are based on the occupant sitting on the vehicle seat. Unless otherwise specified, the left-right inner side and the left-right outer side mean the left-right inner side and the outer side with respect to the vehicle seat.
As shown in FIG. 1, the vehicle seat according to the present embodiment is configured as a vehicle seat S used for, for example, a driver's seat of an automobile, and mainly includes a seat cushion S1, a seat back S2, and a headrest S3. I have it.

A seat back frame F2 as shown in FIG. 2 is built in the seat back S2. The seat back S2 is configured by covering the seat back frame F2 with a cushion material made of urethane foam or the like and a skin material made of synthetic leather or cloth.
The seat back frame F2 mainly includes an upper frame 10 and left and right side frames 20 that form left and right frames of the seat back S2. The upper frame 10 is made of a metal pipe material that is bent into a substantially U shape, and the lower end portions thereof are integrally joined to the upper portions of the left and right side frames 20 by welding or the like. Details of the side frame 20 will be described later.

A pressure receiving member 40, which is an example of a movable portion of the seat back S2 (vehicle seat S), and a pair of left and right drive mechanisms 50 are arranged between the left and right side frames 20. Further, an airbag device 60 as an example of a second device is provided on the right side frame 20 arranged on the outer side in the left-right direction of the vehicle.

The pressure receiving member 40 is a plate-shaped member that receives a load from an occupant seated on the vehicle seat S through a skin material and a cushion material, is formed of resin or the like so as to be elastically deformable, and receives pressure against the occupant's back. The portion 41 and the left and right support portions 42 that extend obliquely forward in the left and right direction from the upper portions of the left and right ends of the pressure receiving portion 41 are integrally formed.

The pressure receiving member 40 is connected to the left and right side frames 20 so as to be movable back and forth via the upper connecting wire W1 and the lower connecting wire W2. Both ends of the upper connecting wire W1 are connected to the drive mechanism 50 fixed to the side frame 20, respectively, and by engaging the engaging claws (not shown) formed on the upper portion of the rear surface of the pressure receiving member 40, The upper portion of the pressure receiving member 40 is connected to the left and right side frames 20. Further, both ends of the lower connecting wire W2 are connected to wire attaching portions (not shown) provided on the side frame 20, respectively, and engage the engaging claws (not shown) formed on the lower portion of the rear surface of the pressure receiving member 40. By doing so, the lower portion of the pressure receiving member 40 is connected to the left and right side frames 20.

The drive mechanism 50 is a mechanism for operating the pressure receiving member 40, is provided on each of the left and right side frames 20, and is arranged on both left and right sides of the pressure receiving member 40. Although the details will be described later, the drive mechanism 50 moves the left end portion or the right end portion of the pressure receiving member 40 from the initial position shown in FIG. 6A to the forward position shown in FIG. Is directed to the right or left, or is moved (returned) from the forward movement position to the initial position. Therefore, the drive mechanism 50 includes a connecting mechanism 51 connected to the pressure receiving member 40 via the upper connecting wire W1 and an actuator 52 as an example of a first device that operates the connecting mechanism 51 to move the pressure receiving member 40. Mostly equipped. In the present embodiment, the left and right side frames 20 and the left and right drive mechanisms 50 are symmetrically configured. Therefore, in the following description, the configuration on the right side will be mainly described in detail.

As shown in FIG. 3, the actuator 52 includes a motor 52A that is configured to rotate in the forward and reverse directions, a gear box 52B that houses a gear (not shown) for reducing the driving force from the motor 52A, and a drive from the motor 52A. It mainly includes an output shaft 52C to which the force is decelerated and transmitted. The actuator 52 is attached to the inside of the side frame 20 (side portion 21) in the left-right direction by fastening a bolt 91 and a nut 92 (see FIG. 4) via brackets 61 and 62.

The coupling mechanism 51 is provided so as to be rotatable in the front-rear direction with respect to the side frame 20, and has two links for operating the pressure receiving member 40, specifically, the first link member 100 and the second link member. 200 and mainly.

The first link member 100 is a plate-shaped member formed of metal or the like into a long plate shape, and one end thereof is fixed to the output shaft 52C of the actuator 52. Thereby, when the actuator 52 drives and the output shaft 52C rotates, the other end of the first link member 100 rotates in the front-rear direction.

The second link member 200 is a plate-shaped member formed in a long plate shape, and one end thereof is rotatably connected to the other end of the first link member 100 via a pin 54. The other end of the second link member 200 is provided with a resin contact portion 230 that contacts the pressure receiving member 40, and a through hole 240 that rotatably engages the end portion of the upper connecting wire W1. ..

One end of the first link member 100 and the second link member 200 is engaged with the first link member 100 and the other end is engaged with the second link member 200, so that the second link member 200 is linked to the first link member 100. A torsion spring 55 that urges the member 100 clockwise in the drawing is arranged.

Returning to FIG. 2, the airbag device 60 is configured to include a bag body, an inflator, and the like, which are not shown. As the airbag device 60, a device having a known configuration can be adopted, and therefore a detailed description thereof will be omitted in this specification. The airbag device 60 is attached to the outside of the right side frame 20 (side portion 21) in the left-right direction by fastening a bolt 93 and a nut 94 (see FIG. 4).

The left and right side frames 20 each have a side portion 21, a pair of front and rear inner extending portions 22, and a pair of front and rear outer extending portions 23, and are formed in an I-shaped (or H-shaped) cross-section. (See also Figure 5).

As shown in FIG. 4, the side portion 21 is a portion to which the actuator 52 and the airbag device 60 are attached, and has a plate shape that is long in the vertical direction. The side part 21 has an upper part 21A as an example of a first part, a lower part 21B as an example of a second part formed below the upper part 21A, and a connecting part 21C. The actuator 52 is attached to the upper portion 21A on the inner side in the left-right direction, and the airbag device 60 is attached to the outer portion on the left-right direction on the lower portion 21B. Therefore, the actuator 52 and the airbag device 60 are arranged so as to be displaced from each other in the vertical direction. The lower side portion 21B is arranged so as to be displaced inward in the left-right direction with respect to the upper side portion 21A, and the connecting portion 21C connects the lower end of the upper side portion 21A and the upper end of the lower side portion 21B. It extends from the lower end toward the upper end of the lower side portion 21B located diagonally below the lower end in the left-right direction. As a result, the actuator 52 and the airbag device 60 have a part thereof, specifically, the left and right outer end portions of the actuator 52 and the left and right inner end portions of the airbag device 60 when viewed in the vertical direction. It is arranged to overlap.

As shown in FIGS. 5A and 5B, the inner extending portion 22 is a portion that extends inward in the left-right direction from both ends (end edges) in the front-rear direction of the side portion 21. The actuator 52 is arranged in the recess 24 formed by the side portion 21 and the front and rear inner extending portions 22.

The outer extending portions 23 are portions that extend outward in the left-right direction from both ends (end edges) in the front-rear direction of the side portion 21. The airbag device 60 is arranged in a recess 25 formed by the side portion 21 and the front and rear outer extending portions 23.

Such a side frame 20 can be formed, for example, by integrally joining two sheet metals by welding or the like. Specifically, one sheet metal that will form the side portion 21 is bent to form the upper portion 21A, the connecting portion 21C, and the lower portion 21B. After that, another elongated metal plate that will form the extending portions 22 and 23 is arranged so as to be wound around the edge of the one metal plate (side portion 21), and is integrally joined by welding or the like. It can be formed.

As shown in FIG. 6, the left and right drive mechanisms 50 are driven independently of each other by the actuator 52 being controlled by a controller (not shown), and the direction of the pressure receiving member 40 in the seat back S2 is changed to the turning direction. It is configured to face (see FIG. 6(c)). Although various methods can be adopted as the control method by the control device, for example, the lateral acceleration and the turning direction are calculated based on the signals from the wheel speed sensor and the steering angle sensor, and the calculated lateral acceleration exceeds a predetermined threshold value. At this time, the actuator 52 (motor 52A) of the drive mechanism 50 on the outer side in the turning direction is driven, whereby the direction of the pressure receiving member 40 is directed in the turning direction.

Here, the operation of the vehicle seat S when the vehicle turns will be described.
When the vehicle turns left, the actuator 52 of the right drive mechanism 50 is driven. Then, from the state shown in FIG. 6A, as shown in FIGS. 6B and 6C, the first link member 100 rotates forward, and the second link member 200 moves to the first link member 100. It moves forward while rotating with respect to it. As a result, the right end of the upper connecting wire W1 moves forward, and the right side support portion 42 (right end) of the pressure receiving member 40 moves from the initial position to the forward advance position. As a result, the pressure receiving member 40 moves toward the left side which is the turning direction as a whole by moving the right end portion from the initial position to the forward position, and the seat back S2 favorably supports the centrifugal force applied to the occupant during turning. be able to.

When the vehicle returns from the turning state to the straight traveling state, the actuator 52 of the drive mechanism 50 on the right side drives in the direction opposite to that at the time of turning. Then, as shown in FIGS. 6B and 6A, the first link member 100 rotates rearward from the state shown in FIG. 6C. Then, the second link member 200 moves rearward while rotating with respect to the first link member 100 by the load applied from the occupant to the pressure receiving member 40. As a result, the right end portion of the upper connecting wire W1 moves rearward, and the right side support portion 42 of the pressure receiving member 40 moves from the forward movement position to the initial position. As a result, the pressure receiving member 40 returns from the left-facing state shown in FIG. 6C to the front-facing state shown in FIG. 6A.

When the vehicle turns right, the actuator 52 of the left drive mechanism 50 is driven. Subsequent operations of the pressure receiving member 40 and the left side drive mechanism 50 are the same as those in the case of turning to the left, and thus detailed description will be omitted.

According to the present embodiment described above, the actuator 52 is arranged in the concave portion 24 formed by the side portion 21 and the inner extending portion 22 of the side frame 20, so that the space in the seatback S2 is effectively used. can do. Further, the actuator 52 can be protected by the inner extending portions 22 arranged before and after the actuator 52.

Further, since the airbag device 60 is arranged in the recess 25 formed by the side portion 21 and the outer extending portion 23, the space in the seat back S2 can be used more effectively. Further, the airbag device 60 can be protected by the outer extending portions 23 arranged in front of and behind the airbag device 60.

Further, since the actuator 52 and the airbag device 60 are arranged vertically offset from each other, the bolt 91 and the nut 92, and the bolt 93 and the nut 94 are less likely to interfere with each other. Further, the bolt 91 and the nut 92 and the airbag device 60 are less likely to interfere with each other, and the bolt 93 and the nut 94 and the actuator 52 are less likely to interfere with each other. Further, the actuator 52 and the airbag device 60 can be easily attached on the opposite side in the left-right direction by fastening the bolts 91, 93 and the nuts 92, 94. That is, since the actuator 52 and the airbag device 60 are vertically displaced from each other, the attachment structure of the actuator 52 and the airbag device 60 can be simplified.

Further, since the lower side portion 21B to which the airbag device 60 is attached is arranged to be displaced inward in the left-right direction with respect to the upper side portion 21A to which the actuator 52 is attached, the space of the side frame 20 can be effectively used. It is possible to suppress the size of the vehicle seat S, which is particularly large in the left-right direction, due to the airbag device 60 being disposed outside in the left-right direction. Further, the rigidity of the side frame 20 can be improved as compared with a configuration in which the side portion is a flat plate shape without bending. More specifically, the side part 21 integrally has an upper part 21A, a lower part 21B that is displaced from the upper part 21A, and a connecting part 21C that connects the upper part 21A and the lower part 21B. Therefore, the rigidity of the side portion 21 itself can be improved, and particularly, the rigidity of the extending portions 22 and 23 arranged at the edge portion of the side portion 21 can be improved. Further, the extending portions 22 and 23 (the metal plates forming the extending portions 22 and 23) can have a structure that is strong against twisting.

Further, since the airbag device 60 as the second device is arranged on the outer side in the left-right direction of the side frame 20, the side portion 21 can support the airbag body when the airbag body (not shown) of the airbag device 60 is deployed. Therefore, the bag can be satisfactorily developed. That is, since the airbag device 60 as the second device is arranged outside the side frame 20 in the left-right direction, the airbag device 60 can be favorably operated.

Although the embodiment of the invention has been described above, the invention is not limited to the embodiment. The specific configuration can be modified as appropriate within the scope of the invention as described below.

In the above-described embodiment, the side portion 21 of the side frame 20 has the upper portion 21A as the first portion and the lower portion 21B as the second portion, but is not limited to such a configuration. Absent. For example, the second portion may be formed above the first portion. Further, the first portion and the second portion may be formed side by side in the front-rear direction when viewed in the left-right direction. Further, the side portions of the side frame may be formed in a flat plate shape that is not bent.

In the above-described embodiment, as shown in FIG. 4, the actuator 52 as the first device and the airbag device 60 as the second device are arranged so as to be vertically offset from each other, but the present invention is not limited to this. is not. For example, as shown in FIG. 7, the actuator 52 and the airbag device 60 may be arranged so as to overlap each other when viewed in the left-right direction so that the positions in the vertical direction are substantially the same. With such a configuration, it is possible to further attach devices or parts other than the actuator 52 and the airbag device 60 to the side frame 20, so that the space can be used more effectively.

In the above-described embodiment, an example in which the side frame 20 having an I-shaped (or H-shaped) cross-section is formed by integrally joining the edge of one sheet metal to another sheet metal by welding or the like has been shown. It is not limited to. For example, when the side frame has a constant cross-sectional shape, it can also be formed by extruding a metal material.

Further, as shown in FIG. 8, the side frame 20 is formed into a letter I shape in cross section having a side portion 21, an inner extending portion 22, and an outer extending portion 23 by bending one sheet metal. You can also do it. Specifically, the side frame 20 bends one sheet metal from the front end and the rear end of the side part 21 toward the inner side in the left-right direction, and further bends the part that becomes the end part of the inner extending part 22. It can be formed by folding back toward the outer side in the left-right direction and forming a portion on the outer side in the left-right direction with respect to the side portion 21 as the outer extending portion 23. Here, the inner extending portion 22 of the side frame 20 shown in FIG. 8 has a double-wall structure having an inner wall portion 22A located inside in the front-rear direction and an outer wall portion 22B located outside in the front-rear direction. There is. In the form shown in FIG. 8, the inner wall portion 22A and the outer wall portion 22B are in contact with each other in the front-rear direction, but there may be a gap between the inner wall portion 22A and the outer wall portion 22B. It is desirable that the gap (front-back interval) between the inner wall portion 22A and the outer wall portion 22B be smaller than the left and right lengths of the inner extending portion 22. In the side frame, one sheet metal is bent outward from the front and rear end portions of the side portion in the left-right direction, and further, the end portion of the outer extending portion is directed inward in the left-right direction. It can also be formed by folding back and forming a portion on the inner side in the left-right direction with respect to the side portion as an inner extending portion (that is, the left and right sides may be opposite to those in FIG. 8).

In the above embodiment, the left and right lengths of the front and rear inner extending portions 22 are the same, but the present invention is not limited to this. For example, the left and right lengths of the front and rear inner extending portions are different from each other. Good. The same applies to the outer extending portion. Further, for example, the inner extending portion and the outer extending portion arranged in the left-right direction may have the same left and right lengths.

Moreover, in the said embodiment, although the inner side extension part 22 and the outer side extension part 23 were the shape extended in the left-right direction straightly, it is not limited to this. For example, the tip of the inner extending portion or the outer extending portion may be bent inward in the front-rear direction or outward in the front-rear direction. In addition, the inner extending portion and the outer extending portion may be curved so that the tip end portion is directed inward in the front-rear direction or outward in the front-rear direction.

In the above-described embodiment, both the left and right side frames 20 are formed in a cross-sectional I-shape having the side portion 21, the inner extending portion 22, and the outer extending portion 23, but are not limited thereto. Not something. For example, when the first device and the second device are attached to only one of the left and right side frames, only one of the left and right side frames has the side part, the inner extending part, and the outer extending part. It may be configured to have an I-shape in a cross-sectional view having a protrusion .

In the above-described embodiment, the first device is the actuator 52 that moves the movable portion (pressure receiving member 40) of the seat back S2, and the second device is the airbag device 60. However, the present invention is not limited to this. Absent. For example, the first device may be an actuator that moves a movable portion of the seat cushion. The vehicle seat may have a configuration in which the first device and the second device are attached to both the left and right side frames. The vehicle seat may have a configuration in which the first device is attached to only one of the left and right side frames. Further, the vehicle seat may be configured to include only the first device and not include the second device.

In the above embodiment, the left and right side frames 20 constituting the left and right frames of the seat back S2 are exemplified as the left and right side frames, but the present invention is not limited to this. For example, the side frame may be a side frame of a frame forming left and right frames of the seat cushion. Further, the side frame may be configured such that the frame of the seat back and the frame of the seat cushion are integrally formed.

In the above-described embodiment, the vehicle seat S used in an automobile is exemplified as the vehicle seat, but the vehicle seat is not limited to this, and the vehicle seat may be a vehicle other than an automobile, such as a railroad vehicle, a ship, or an aircraft. It may be the sheet used.

20 side frame 21 side part 21A upper side part 21B lower side part 22 inside extension part 23 outside extension part 40 pressure receiving member 52 actuator 60 airbag device S vehicle seat S2 seat back

Claims (9)

A vehicle seat having left and right side frames that form left and right frames,
A first device for moving a movable part of a vehicle seat;
A second device,
At least one of the left and right side frames is
The first device is attached to the surface on one side in the left-right direction, and a plate-shaped side portion that is long in the longitudinal direction orthogonal to the left-right direction ,
A first extending portion extending from both end portions in the right-left direction of the side portion and an orthogonal direction orthogonal to the longitudinal direction toward the one side in the left-right direction;
A second extending portion extending from both ends of the side portion in the orthogonal direction to the other side in the left-right direction ,
The second device is attached to a surface of the side portion on the other side in the left-right direction ,
The first device and the second device are arranged offset in the longitudinal direction,
The first extending portion has an inner wall portion extending from the side portion, and an outer wall portion extending from an end portion of the inner wall portion on the one side in the left-right direction toward the other side in the left-right direction. It has a double wall structure,
The vehicle seat, wherein the second extending portion is a portion extending from the outer wall portion to the other side in the left-right direction . The vehicle seat according to claim 1, wherein the first extending portion overlaps the first device when viewed from the orthogonal direction. The vehicle seat has a connecting member that connects end portions of the left and right side frames in the longitudinal direction closer to the first device than the second device,
The first device is arranged at a position different from the connecting member in the longitudinal direction,
The vehicle seat according to claim 2, wherein the first extending portion overlaps with the connecting member when viewed from the orthogonal direction. The vehicle seat according to claim 3, wherein the left and right end portions of the connecting member joined to the side frames are disposed on the one side of the side portion in the left-right direction. The vehicle seat according to any one of claims 1 to 4, wherein the vehicle seat includes a seat cushion, a seat back, and a headrest. The end portion of the first device close to the side portion is inserted into a recess formed by the side portion and the first extension portion. The vehicle seat according to item 1. The first device is fixed to the side frame by a fixing member,
The fixing member is
As seen from the orthogonal direction, while overlapping with the second extending portion,
The vehicle seat according to any one of claims 1 to 6, which is arranged on the one side in the left-right direction with respect to the left-right direction end portion of the second extending portion. The vehicle seat according to any one of claims 1 to 7, wherein there is a gap between the inner wall portion and the outer wall portion. The vehicle seat according to claim 8, wherein the size of the gap is smaller than the length of the first extending portion in the left-right direction.

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