JP2023004321A - Vehicular seat - Google Patents

Abstract

To improve the stiffness of a pam frame attached to a seat cushion frame as a pressure receiving member.SOLUTION: A vehicular seat S is equipped with a seat cushion 2, a seat cushion frame 20 that forms a skeleton of the seat cushion, a pan frame 25A that is attached across the front and back of the seat cushion frame, and reinforcing brackets 30A and 30B that are attached to a lower part of the pan frame and reinforce the pan frame. The reinforcing brackets are attached to the lower part of the pan frame to improve the stiffness of the pan frame.SELECTED DRAWING: Figure 6

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat, and more particularly to a vehicle seat having a pan frame that supports an occupant from below in a seat cushion.

2. Description of the Related Art Conventionally, there is a vehicle seat in which a seat body can be flipped forward and folded. In the flip-up type vehicle seat, the seat body is fixed to the vehicle body floor by a locking member so that the seat body does not flip up carelessly. The seat body can be flipped forward by an occupant using a lever or the like to release a lock member provided at the lower end of the seat back. In the vehicle seat described in Patent Document 1, a lock member (called a lock device in Patent Document 1) is attached to a linearly formed seat cushion frame.

JP-A-2000-355240

When the lock member is attached to the linear frame, there is a risk that the linear frame will be bent together with the lock member due to insufficient strength, resulting in incomplete fixation to the vehicle body floor. In recent years, the seat cushion frame has been provided with a pan frame as a pressure-receiving member that supports the occupant. there were.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to improve the rigidity of a pan frame attached to a seat cushion frame as a pressure receiving member. Furthermore, by improving the rigidity of the pan frame, the lock member is attached to the pan frame to suppress an increase in the number of parts of the lock member, and the lock member can be attached in a compact space.

The above-mentioned problem is a vehicle seat, which includes a seat cushion, a seat cushion frame forming the skeleton of the seat cushion, a pan frame attached across the front and rear of the seat cushion frame, and a pan frame attached to the lower part of the seat cushion frame. , and a reinforcing bracket that reinforces the pan frame.

According to the vehicle seat described above, the reinforcing bracket is provided at the lower portion of the pan frame, thereby improving the rigidity of the pan frame. Accordingly, it is possible to stably support a seated occupant and to firmly attach a lock member or the like.

Further, in the vehicle seat described above, the reinforcing bracket is formed to have a substantially L-shaped cross section, and is preferably arranged across the front and rear of the pan frame.
The rigidity of the pan frame in the front-rear direction can be improved by arranging the reinforcing bracket having a substantially L-shaped cross section across the front and rear of the pan frame.

Further, in the vehicle seat described above, the reinforcing bracket may be arranged around the outside of the pan frame.
By arranging the reinforcing brackets around the outside of the pan frame, the rigidity of the pan frame is ensured and the ride comfort is improved.

Further, in the vehicle seat described above, the reinforcing bracket may be composed of a pair of members arranged to face each other on both side portions in the left-right direction of the pan frame.
By providing a pair of members facing each other on the left and right outer sides, the rigidity of the pan frame can be further improved.

Further, in the vehicle seat described above, the reinforcing bracket has a wall portion extending in the vertical direction and a joint portion joined to the pan frame at an upper end of the wall portion, the joint portion being located inside the wall portion. should be placed in
By joining the joint portion arranged inside the wall portion to the pan frame, the supporting force of the occupant seated on the vehicle seat is improved.

Moreover, the vehicle seat described above may further include a lock member for fixing the seat cushion to the floor surface, and the lock member may be attached to the wall portion of the reinforcing bracket.
The lock member can be installed in a compact space.

In the vehicle seat described above, the locking member may be attached to the outside of the wall portion of the reinforcing bracket.
By attaching the locking member to the outside, it is possible to stably support a seated occupant and stably fix the seat cushion to the floor surface.

Further, in the vehicle seat described above, the lock member may be attached to a part of the lower side of the wall portion that is notched.
By attaching the lock member to a part of the lower side of the wall that is notched, it is possible to secure the strength and fix the lock member while preventing the wall from inhibiting the locking operation. In addition, weight reduction can be achieved by notching a part of the wall portion of the reinforcing bracket.

Further, in the vehicle seat described above, the locking member is provided on each of the reinforcing brackets formed of the pair of members, and the pair of locking members are positioned at the same front-rear direction in the reinforcing bracket so as to face each other. should be attached to
A locking member is provided on each of the reinforcing brackets consisting of a pair of members, and the pair of locking members are attached at the same front-rear direction positions facing each other, thereby supporting the occupant and fixing the cushion seat in a well-balanced manner. be able to.

Further, in the vehicle seat described above, the reinforcing bracket may be fixed to connecting frames located in front and rear of the seat cushion frame.
By fixing the reinforcing bracket to the seat cushion frame, the rigidity of the seat cushion frame can be improved.

According to the present invention, the rigidity of the pan frame is improved by providing the reinforcing bracket in the lower portion of the pan frame, thereby holding the occupant seated from below.
Further, by arranging a reinforcing bracket having a substantially L-shaped cross section across the front and rear of the pan frame, it is possible to improve the rigidity of the pan frame in the front-rear direction.
In addition, by arranging the reinforcing brackets around the outside of the pan frame, the rigidity of the pan frame is ensured and the ride comfort is improved.
In addition, the rigidity of the pan frame can be further improved by providing a pair of members facing each other on the left and right outer sides.
In addition, by arranging the joint portion to be joined to the pan frame outside the wall portion, the supporting force for the passenger seated on the vehicle seat is improved.
Also, by attaching the lock member to the wall of the reinforcing bracket, it can be installed in a compact space.
Moreover, by attaching the locking member to the outside of the wall, it is possible to stably support the passenger and stably fix the cushion to the floor surface.
By attaching the lock member to a part of the lower side of the wall that is notched, it is possible to secure the strength and fix the lock member while preventing the wall from inhibiting the locking operation. In addition, weight reduction can be achieved by notching a part of the wall portion of the reinforcing bracket.
Further, the locking members are provided on each of the reinforcing brackets made up of a pair of members, and the pair of locking members are attached at the same front-rear direction positions facing each other, thereby supporting the occupant and fixing the cushion seat in a well-balanced manner. can be implemented.
Further, by fixing the reinforcing bracket to the seat cushion frame, the rigidity of the seat cushion frame can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of the appearance of a vehicle seat according to an embodiment of the present invention, viewed obliquely from the front; Fig. 2 is a perspective view of the seat frame of the vehicle seat, viewed obliquely from the front; It is a top view which shows the seat frame of a vehicle seat. It is a bottom view which shows the seat frame of a vehicle seat. FIG. 5 is a view showing a state in which the locking member is unlocked and the seat cushion is flipped forward, and is a cross-sectional view taken along line VV in FIGS. 3 and 4; FIG. FIG. 4 is a perspective view of a pan frame with reinforcing brackets and locking members attached; FIG. 4 is a side view of the pan frame with reinforcing brackets and locking members attached; It is a perspective view of a reinforcement bracket. It is a side view of a reinforcement bracket.

A configuration of a vehicle seat according to an embodiment of the present invention will be described below with reference to the drawings. However, the embodiments described below are intended to facilitate understanding of the present invention, and are not intended to limit the present invention. That is, the present invention can be modified and improved without departing from its spirit, and the present invention includes equivalents thereof.
In addition, in the following description, the material, shape, and size of the seat component are merely specific examples, and do not limit the present invention.

In the following, as an example of a vehicle seat, a vehicle seat mounted in a vehicle will be cited, and an example of the configuration thereof will be described. However, the present invention is not limited to vehicle seats mounted on ground vehicles having wheels, such as automobiles and railways, but is also applicable to seats mounted on aircraft, ships, etc. that move other than on the ground. can be applied.

Further, in the following description, the term “front-rear direction” refers to the front-rear direction of the vehicle seat, which is the direction in which the vehicle travels. Further, the "seat width direction" is the width direction of the vehicle seat, and is the direction that coincides with the left-right direction viewed from the occupant seated on the vehicle seat. Further, the "vertical direction" is the vertical direction of the vehicle seat, and is the direction that coincides with the vertical direction when the vehicle is running on a horizontal plane. The term "outside" simply refers to the direction closer to the outside in the direction from the center of the vehicle seat unit to the outside, and the term "inside" refers to the direction closer to the center from the outside to the center of the vehicle seat unit. means the direction

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

<Vehicle seat S>
A basic configuration of a vehicle seat (hereinafter referred to as a vehicle seat S) according to this embodiment will be described with reference to FIG. FIG. 1 is a perspective view of a vehicle seat S, and a part of the vehicle seat S in FIG. 1 is shown without a cushion trim cover T and a pad P for convenience of illustration.

The vehicle seat S is a seat that is placed on the vehicle body floor BF and on which the passenger of the vehicle sits. In this embodiment, the vehicle seat S is used as a rear seat corresponding to a rear 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 front seat. It can also be used as a rear seat.
In addition, the vehicle seat S is a flip-up type seat, and its shape and posture change between a seated state and a hip-up state in which the rear portion of the seat is flipped up. The shape of each configuration will be described as follows.

In the configuration shown in FIG. 1, the vehicle seat S has a right seat Sa arranged on the right side, a left seat Sb arranged on the left side, and a center seat Sc provided therebetween. The seat backs 1 of the left seat Sb and the center seat Sc are configured to fold forward individually. Further, the seat cushion 2 is integrally provided so as to be rotatable forward with respect to the vehicle body floor BF, so that the left seat Sb and the center seat Sc can be flipped up as a unit.

The right seat Sa, as shown in FIG. , a headrest 3 for supporting the head of a seated person. The seat back 1 and the seat cushion 2 are connected so as to sandwich the reclining mechanism 7 therebetween. The seat back 1 is connected to the seat cushion 2 so as to be rotatable and angle adjustable. The reclining mechanism 7 adjusts the tilt angle of the seatback 1 .
Also, the seat cushion 2 is attached to the vehicle body floor BF via a link mechanism provided in front of the seat cushion 2 in a rotatable state.

As shown in FIG. 1, each of the left seat Sb and the center seat Sc also has a seat back 1, a seat cushion 2, and a headrest 3 as main components. are connected so as to sandwich the reclining mechanism 7 therebetween. As described above, the seat backs 1 of the left seat Sb and the center seat Sc can be folded integrally. The seat cushions 2 of the left seat Sb and the center seat Sc are attached via a link mechanism provided in front of the seat cushion 2 so as to rotate integrally with respect to the vehicle body floor BF.

As shown in FIGS. 2 to 4, seat frames F are provided in the right seat Sa, the left seat Sb, and the center seat Sc. It is composed of a frame 10 and a seat cushion frame 20 forming the skeleton of the seat cushion 2 .

The seat back frame 10 is formed in the shape of a square frame as a whole, and includes back side frames 11 arranged on both sides and a back panel 16 arranged therebetween.

The seat cushion frame 20 is also formed in the shape of a square frame, and cushion side frames 21 are provided on the sides thereof. It also has a front connecting frame 22 that connects the cushion side frames 21 in front, and a rear connecting frame 23 that connects the cushion side frames 21 in the rear. A front connecting frame 22 and a rear connecting frame 23 in front and rear of the vehicle seat S are made of round pipes. Further, pan frames 25A, 25B, and 25C are attached as pressure-receiving members across the front connecting frame 22 and the rear connecting frame 23 . The pan frames 25A, 25B, 25C support the buttocks of the seated occupant from below.

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

A reclining mechanism 7 is provided between the rear end portion of the seat cushion 2 and the lower end portion of the seat back 1 . More specifically, the reclining mechanism 7 connects the seatback frame 10 of the seatback 1 and the seat cushion frame 20 of the seat cushion 2 . The reclining mechanism 7 makes it possible to adjust the angle of the seat back 1 (seat back frame 10) with respect to the seat cushion 2 (seat cushion frame 20). The reclining mechanism 7 allows the seat back 1 to be locked at a predetermined angle and maintained in an inclined state. Further, by releasing the lock, the seat back 1 can be laid down forward or backward.

A slide rail 4 is installed below the vehicle seat S as shown in FIGS. 2 and 4 . The slide rails 4 allow the vehicle seat S to be attached to the vehicle body floor BF so as to be slidable in the longitudinal direction.

The slide rail 4 is a device for sliding the right seat Sa or the left seat Sb and the center seat Sc along the longitudinal direction, and has a known structure (structure of a general slide rail mechanism). The slide rail 4 has a lower rail fixed on the vehicle body floor BF and an upper rail slidable relative to the lower rail. The upper rail is slidable with respect to the lower rail fixed to the vehicle body.

<Bread frame>
The vehicle seat S of this embodiment is provided with the pan frames 25A to 25C that support the occupant from below as described above. The pan frames 25A to 25C are plate-like members made of metal, and are arranged to extend in the front-rear direction as shown in FIGS. The pan frames 25A to 25C have front ends fixed to the front connecting frame 22 of the seat cushion frame 20 and rear ends fixed to the rear connecting frame 23 . Each of the pan frames 25A to 25C has a bottom surface portion 28 for receiving the cushion pad of the seat cushion 2. The rear end portion of each bottom surface portion 28 rises gradually toward the rear, and the front end portion of the bottom surface portion 28 rises forward. It is formed so that it gradually rises as it goes to. That is, the bottom portions 28 of the pan frames 25A to 25c are shaped to easily receive the cushion pads.

The bottom portion 28 is located on the rear side of the pan frames 25A to 25C, and has a through hole 26 formed therein to reduce the weight. Also, two reinforcing beads 27A and 27B extending in the front-rear direction are formed at the center of each of the pan frames 25A to 25C. The reinforcing beads 27A and 27B sandwich the through hole 26 at their rear ends. A recess 29 is formed in the front end to reinforce the front end of the pan frames 25A to 25C. Further, by forming the reinforcing beads 27A and 27B and the recessed portion 29 so as to protrude downward, the sense of discomfort given to the seated occupant is suppressed.

<Lock member>
As shown in FIGS. 5 to 7, the vehicle seat S includes lock members 40A and 40B (hereinafter collectively referred to as lock members 40) for fixing the seat cushion 2 (seat cushion frame 20) to the vehicle body floor BF. ) is provided. The locking member 40 is provided with a claw portion 41 that rotates in conjunction with the operation lever. is fixed to the body floor BF. By operating a lever provided on the vehicle seat S, the occupant releases the lock by the claw portion 41 of the lock member 40, rotates the vehicle seat S in the direction of arrow A in FIG. Jump up 2. Since the lock member 40 has a known structure, detailed description thereof is omitted.

<Reinforcement bracket>
In this embodiment, reinforcing brackets 30A and 30B are attached to the lower portion of the pan frame 25A of the right seat Sa, and a reinforcing bracket 30C is attached to the lower portion of the pan frame 25B of the left seat Sb. The reinforcing brackets 30A, 30B, 30C also function as lock support brackets that attach and support the lock member 40 to the pan frames 25A, 25B.
The reinforcing bracket 30C provided on the pan frame 25B has substantially the same shape and function as the reinforcing bracket 30B on the pan frame 25A. Therefore, the reinforcing brackets 30A and 30B (hereinafter collectively referred to as the reinforcing bracket 30 in some cases) attached to the pan frame 25A of the right seat Sa will be described below mainly using FIGS.

The reinforcing bracket 30 is a member that reinforces the pan frame 25A by being attached below the pan frame 25A. The reinforcing bracket 30 has a vertically extending wall portion 31 and a joint portion 32 formed in a flange shape at the upper end portion of the wall portion 31 . The joint portion 32 is a portion that contacts and joins the lower surface of the pan frame 25A. The reinforcement bracket 30 is welded to the lower surface of the pan frame 25A and the joint portion 32 . The pan frame 25A and the reinforcing bracket 30 may be joined by fastening members such as bolts. The wall portion 31 and joint portion 32 of the reinforcing bracket 30 are formed along the lower surface of the pan frame 25A. Further, the wall portion 31 of the reinforcing bracket 30 is installed so as to be substantially orthogonal to the lower surface of the pan frame 25A in a front view. By attaching the reinforcing bracket 30 to the pan frame 25A in this manner, the rigidity of the pan frame 25A is improved.

As shown in FIG. 8, joint portions 32 of the reinforcing brackets 30A and 30B are formed to bend toward the inside of the right seat Sa, and the reinforcing bracket 30 has a substantially L-shaped cross section. In other words, the joint portion 32 that joins the pan frame 25A is arranged inside the wall portion 31 in the width direction. The reinforcing bracket 30 is arranged across the front and rear of the pan frame 25A. By attaching the reinforcing bracket 30, the rigidity of the pan frame 25A is improved. By improving the rigidity of the pan frame 25A, it is possible to stably support the buttocks of the occupant and to attach a lock member 40, which will be described later.

As shown in FIG. 6, the pan frame 25A has a width L1 of a front end portion 25Aa connected to the front connection frame 22 and a width L2 of a rear end portion 25Ab connected to the rear connection frame 23, which are different. The width L2 of the rear end portion 25Ab is formed to be smaller than the width L1 of the front end portion 25Aa, in other words, the width is narrowed. Therefore, the reinforcing brackets 30A and 30B are partially exposed, and the pan frame 25A is provided between the pair of reinforcing brackets 30A and 30B. The front ends of the reinforcing brackets 30A and 30B are connected to the front connecting frame 22, and the rear ends are connected to the rear connecting frame 23, so that they are also fixed. By connecting the reinforcing bracket 30 to the front connecting frame 22 and the rear connecting frame 23, the rigidity of the seat cushion frame 20 is improved.

Although the joint portion 32 of the reinforcing bracket 30A shown in FIG. 8 is formed so as to bend inward, the joint portion 32 may be formed so as to bend outward. In other words, the joint portion 32 may be arranged outside the wall portion 31 in the width direction. By arranging the joint portion 32 on the outside, the length in the width direction to be supported is increased, so that the support force for the seated occupant can be improved.

As shown in FIG. 6, the reinforcing brackets 30A and 30B are arranged on the left and right sides of the pan frame 25A. More specifically, the reinforcing bracket 30A and the reinforcing bracket 30B are a pair of members arranged opposite to each other with the center line C extending in the front-rear direction as a symmetrical axis on both sides in the width direction (left-right direction) of the pan frame 25A. It is configured.

Two lock members 40A and 40B are attached to the pan frame 25A via a reinforcing bracket 30, as shown in FIG. Lock members 40A and 40B are attached to wall portion 31 of reinforcing bracket 30 . More specifically, the locking member 40A is externally mounted on the wall 31 of the reinforcing bracket 30A, and the locking member 40B is externally mounted on the wall 31 of the reinforcing bracket 30B. By attaching the lock member 40 to the reinforcing bracket 30, the lock member 40 can be attached in a compact space. Further, by attaching the lock member 40 to the outside of the wall portion 31, it is possible to stably support the seated occupant and to stably fix the seat cushion 2 to the floor surface.

Further, the lock member 40 is attached to a portion (lock member attachment portion 35 ) formed by cutting out a portion of the lower side of the wall portion 31 . More specifically, as shown in FIGS. 8 and 9, a part of the lower side of the wall portion 31 is cut out by a substantially L-shaped notch 35a in a side view, thereby forming a mounting piece 35b. , 35c are formed. Three through holes 36 for fixing the lock member 40 with a fastening member such as a bolt are formed in the lock member mounting portion 35 . One of them is formed on the wall portion 31 and the other two are formed on the mounting pieces 35b and 35c.
By notching the wall portion 31 with the notch 35a and attaching the locking member 40 to the cutout portion, the locking member 40 is fixed with sufficient strength while suppressing the blocking of the locking operation of the locking member 40 by the wall portion 31. be able to. Also, the weight of the reinforcing bracket 30 can be reduced by notching the reinforcing bracket 30 into a substantially L shape. In the present embodiment, the lock member mounting portion 35 is realized by notching in a substantially L-shape, but the shape of the notch is arbitrary. You may notch in V shape.

A pair of locking members 40A and 40B are provided on each of the pair of reinforcing brackets 30A and 30B. The pair of locking members 40A and 40B are attached to the same front-rear direction positions in the pair of reinforcing brackets 30A and 30B so as to face each other. In other words, the pair of locking members 40A and 40B are arranged at overlapping positions when viewed from the side. By arranging the pair of lock members 40A and 40B in this way, it is possible to support the occupant and fix the seat in a well-balanced manner.

The opposing reinforcing brackets 30A and 30B are connected not only by the pan frame 25A but also by two bracket connecting members 37 and 38 extending in the width direction as shown in FIG. The bracket connecting members 37 and 38 are round pipes. The bracket connecting member 37 is arranged in the front and the bracket connecting member 38 is arranged in the rear to reinforce the reinforcing brackets 30A and 30B. In particular, the bracket connecting member 38 is arranged near the lock member attachment portion 35 to which the lock member 40 is attached, thereby suppressing displacement of the lock member 40 .

A linear member 42 extends from the front ends of the reinforcing brackets 30A and 30B and connects to the rear connecting frame 23 of the seat cushion frame 20 (see FIG. 3). The linear member 42 supports the pad P of the seat cushion 2 .

The vehicle seat S of this embodiment has been described above with reference to the drawings. Although the pan frame 25A provided on the right seat Sa of the vehicle seat S and the reinforcing brackets 30A and 30B attached thereto have been described, the reinforcing bracket 30C is also attached to the pan frame 25B provided on the left seat Sb. ing. Thus, the reinforcing brackets 30 may not be provided on both sides of the pan frame 25A, and either one of the reinforcing brackets 30A, 30B may be attached to one side.

S Vehicle seat (vehicle seat)
Sa Right seat Sb Left seat Sc Central seat F Seat frame BF Body floor T Cushion trim cover P Pad 1 Seat back 2 Seat cushion 3 Headrest 4 Slide rail 7 Reclining mechanism 10 Seat back frame 11 Back side frame 16 Back panel 20 Seat cushion frame 21 Cushion side frame 22 Front connection frame 23 Rear connection frame 25A, 25B, 25C Pan frame 26 Through hole 27A, 27B Reinforcement bead 28 Bottom surface 29 Recess 30, 30A, 30B, 30C Reinforcement bracket 31 Wall 32 Joint 35 Lock member Mounting portion 35a Notch 35b, 35c Mounting piece 37 Bracket connection member 38 Bracket connection member 40, 40A, 40B Lock member 41 Claw portion 42 Linear member

Claims (10)

seat cushion and
a seat cushion frame forming a skeleton of the seat cushion; a pan frame attached across the front and rear of the seat cushion frame;
and a reinforcing bracket attached to a lower portion of the pan frame to reinforce the pan frame. 2. The vehicle seat according to claim 1, wherein the reinforcing bracket has a substantially L-shaped cross section and is arranged across the front and rear of the pan frame. 3. A vehicle seat according to claim 1 or 2, wherein the reinforcing brackets are arranged around the outside of the pan frame. 4. The vehicle seat according to any one of claims 1 to 3, wherein the reinforcing bracket is composed of a pair of members arranged opposite to each other on both sides in the left-right direction of the pan frame. The reinforcing bracket has a wall portion extending in the vertical direction and a joint portion that joins the pan frame at an upper end of the wall portion, and the joint portion is arranged inside the wall portion. The vehicle seat according to any one of claims 1 to 4. Having a lock member for fixing the seat cushion to the floor,
6. The vehicle seat of claim 5, wherein said locking member is attached to said wall of said reinforcing bracket. 7. The vehicle seat of claim 6, wherein said locking member is externally mounted on said wall of said reinforcing bracket. 8. The vehicle seat according to claim 6, wherein the lock member is attached to a part of the lower side of the wall portion which is notched. 3. The locking member is provided on each of the reinforcing brackets comprising a pair of members, and the pair of locking members are attached to the reinforcing bracket at the same longitudinal positions facing each other. 9. A vehicle seat according to any one of claims 5 to 8 reciting 4. 10. A vehicle seat according to any one of claims 1 to 9, wherein the reinforcing brackets are fixed to connecting frames on the front and rear of the seat cushion frame.

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