JP6691308B2 - Vehicle seat - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a vehicle seat, and more particularly to a vehicle seat capable of storing a seat back and a seat cushion on a storage floor formed at a position lower than a vehicle body floor.

  Conventionally, there is already known a vehicle seat in which a seat back and a seat cushion that form the seat body can be stored on a storage floor formed at a position lower than the vehicle body floor. There is a vehicle rear seat that can be stored on a storage floor provided in front of the seat (see, for example, Patent Document 1).

The vehicle seat described in Patent Document 1 is attached to a vehicle body floor and is rotatably held in a mounting groove that rotatably supports a seat back and a holding groove that is fixed to a storage floor. And a retractable leg member for supporting the.
At the time of storing the seat body, the seat back rotates with respect to the vehicle body floor so as to move the seat cushion to the storage floor, and the retractable leg members rotate in conjunction with the seat back around the holding groove, so that the seat The main body can be stored on the storage floor.
In addition, the vehicle seat has a configuration in which a seatable state in which an occupant can sit can be switched to a tip-up state in which a retractable leg member is detached from a holding groove and a seat cushion is flipped up.

JP, 2009-67309, A

However, in a seat in which the seat body can be stored on the storage floor as in Patent Document 1, a leg member for rotatably supporting the seat back not only on the vehicle body floor surface on which the seat body is installed but also on the storage floor surface. Also, components such as a holding groove are attached, and a complicated storage structure is provided for storing the seat body.
In particular, the holding groove that holds the lower end of the leg member is fixed to the storage floor, and the total length of the leg member that supports the seat cushion becomes long. Therefore, the seat cushion that receives the sitting load of the seated person, the leg member, Also, consideration was required to improve the support rigidity of the holding groove.
Therefore, there is a demand for a vehicle seat that has a simple structure and has improved support rigidity of the seat body and that can be stored on the storage floor. Further, a vehicle seat that can secure a large storage space has been desired.

Further, in the seat as disclosed in Patent Document 1, the leg member that supports the seat cushion is a long member because it is connected between the seat cushion and the storage floor.
Therefore, when switching the seat body between the seatable state and the tip-up state, it is necessary to remove or attach the leg member from the holding groove, or to attach the leg member, but due to the long length of the leg member, Since the swing width of the leg member in the front-rear direction becomes large, it is difficult to mount the leg member in the holding groove.
Therefore, there has been a demand for a vehicle seat that can be easily switched from the seatable state.

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 that can be stored on a storage floor and has a simple structure and improved support rigidity of a seat body. To do.
Another object of the present invention is to provide a vehicle seat that can secure a large storage space without disposing components of the storage structure on the storage floor surface.
Another object of the present invention is to provide a vehicle seat that is easy to switch from a seatable state.

According to the vehicle seat of the present invention, there is provided a vehicle seat in which the seat back and the seat cushion connected to the seat back can be stored on a storage floor formed at a position lower than a vehicle body floor. A support base provided on the vehicle body floor, arranged below the seat cushion, and rotatably connected to a lower end side of the seat back, and a base cover covering the support base from above. The base cover is provided with a recessed portion which is recessed downward from the upper surface, and the recessed portion is arranged at a central position of the vehicle seat in the seat width direction .

According to the above configuration, the retract and floor may be provided with a simple structure without providing for any components, the seat back and the vehicle seat capable of accommodating the seat cushion storage floor constituting a seat body. Also, it is possible to secure a large storage space to retract and floor.

At this time, the recess preferably has a pair of left and right side walls and a bottom wall .

At this time, the recess may be formed integrally with the front portion of the base cover .

At this time, a lower end side of the seat back is pivotally supported by the support base by a back rotation shaft, and the back rotation shaft is preferably arranged behind the recess in the seat front-rear direction .

At this time, a lower rail fixed to the vehicle body floor and extending in the seat front-rear direction may be provided, and the recess may be disposed between the back rotation shaft and the lower end of the lower rail in the seat up-down direction .

At this time, a cutout portion that is cut out forward is provided at the rear of the base cover, and the recess may be disposed on the front side in the seat front-rear direction with respect to the cutout .

At this time, a portion of the base cover corresponding to the back rotation shaft is raised more than a front end portion and a rear end portion of the base cover, and the front portion and the rear portion of the raised portion are respectively inclined. It is preferable to provide the inclined portion .

At this time, the support base includes left and right side base portions and a first base connecting portion that connects front portions of the left and right side base portions, and a central portion of the first base connecting portion has the concave portion. It is better to be placed on the front side of the bottom part of the .

At this time, a second base connecting portion that connects substantially central portions of the left and right side base portions, a lower rail that is fixed to the vehicle body floor and extends in the seat front-rear direction, and an upper rail that is slidably supported along the lower rail. It is preferable that the first base connecting portion and the second base connecting portion are arranged at positions overlapping the lower rail and the upper rail in the vertical direction .

According to the present invention, the retract and floor simple structure without providing for any components, can provide a seat back and a seat for a vehicle capable of accommodating the seat cushion storage floor constituting a seat body. Also, it is possible to secure a large storage space to retract and floor.

1 is a perspective view of a vehicle seat according to the present invention. FIG. 3 is a perspective view of a seat frame that serves as a skeleton of a vehicle seat. It is a perspective view of a seat frame and is a partially enlarged view. It is a front view of a seat frame and is a partially enlarged view. It is a side view of a vehicle seat, and is a figure explaining operation which moves to a stowage state from a seatable state. It is a side view of a vehicle seat, and is a figure explaining operation which moves to a stowed state. It is a side view of a vehicle seat, and is a figure explaining operation which moves from a stowed state to a tip-up state. It is a side view of a vehicle seat, and is a figure explaining operation which returns to a seatable state from a tip-up state.

The present embodiment is a vehicle seat capable of accommodating a seat body on a storage floor, and includes a support base on which left and right upper rails that constitute a rail device fixed on the vehicle body floor are installed, and the seat back is a support base. A leg holder that is rotatable about a back rotation shaft attached to the seat so as to move the seat cushion to the storage floor side, and detachably holds the lower ends of the support legs that support the seat cushion on the support base. The present invention relates to an invention of a vehicle seat in which members are attached.
The side on which the occupant sits with respect to the seat back of the vehicle seat is the front side of the seat.

The vehicle seat S of the present embodiment is, for example, a rear seat corresponding to a rear seat of the vehicle. It can also be used as a second-row middle seat in a vehicle having three rows of seats in the vehicle front-rear direction.
The vehicle seat S is mounted on the vehicle body floor as shown in FIG. 2 and a seat body including a seat back 1, a seat cushion 2, and a headrest 3, as shown in FIG. The left and right rail devices 4 that movably support the seat legs, the support legs 30 that are mounted between the seat body and the rail device 4, and that support the seat cushion 2, and the support base that rotatably supports the seat back 1. 40 and a leg holding member 50 attached to the support base 40 and detachably holding the support leg 30.
Further, in the vehicle seat S, a reclining device 13 that rotatably connects the seat back 1 to the support base 40 and a cushion lock device 25 that rotatably connects the seat cushion 2 to the seat back 1. And are attached.
On the front side of the vehicle seat S, as shown in FIG. 5, a concave storage floor formed at a position lower than the vehicle body floor is provided.

The vehicle seat S has three types of seat arrangements: a seatable state in which an occupant can sit, a stored state in which the seat body is stored on the storage floor, and a tip-up state in which the seat body is flipped up. It is a possible sheet.
Specifically, the vehicle seat S is stored in the storage floor when the occupant pulls an operation lever (not shown) from the seatable state shown in FIG. The storage state is switched to that shown in FIG. Further, the occupant manually raises the seat body from the stored state to the tip-up state shown in FIG. 7B. Further, when the occupant pulls the support leg 30 functioning as an operation lever from the tip-up state, the seat cushion 2 rotates below the seat with respect to the seat back 1, and the seat back state is restored. Details will be described later.

As shown in FIG. 1, the seat back 1 is a backrest portion that supports the back of an occupant from the rear, and the cushion pad 1a is placed on the back frame 10 shown in FIG. It is covered and configured.
The seat cushion 2 is a seating portion that supports an occupant from below, and a cushion pad 2a is placed on a cushion frame 20 shown in FIG. 2 that serves as a skeleton and is covered with an outer skin 2b from above the cushion pad 2a. It is configured.
The headrest 3 is a head that supports the occupant's head from the rear, and is configured by placing a cushion pad 3a on a pillar (not shown) that serves as a core material, and covering the cushion pad 3a with a skin 3b.

The rail device 4 is disposed between the seat body and the vehicle body floor in the vertical direction, and as shown in FIG. 2, is fixed to the vehicle body floor and is provided on the left and right lower rails 4a extending in the seat front-rear direction and the lower rails 4a. The left and right upper rails 4b are slidably supported along the upper rails 4b.
Lower rail fixing portions 4c for fixing to the vehicle body floor are attached to the front and rear of the bottom surfaces of the left and right lower rails 4a, respectively, and a support base 40 is provided on the upper surfaces of the left and right upper rails 4b.
The rail device 4 is provided with a lock member (not shown) that locks the upper rail 4b so that it cannot slide, and an operation lever (not shown) that releases the locked state of the lock member.

The back frame 10 is composed of a substantially rectangular frame body that serves as a skeleton of the seat back 1, and as shown in FIG. The left and right connecting brackets 11 are attached.
The connecting bracket 11 is made of a sheet metal member extending in the vertical direction, is formed in a substantially bow shape when viewed from the side of the seat, and the upper end of the connecting bracket 11 is attached to the back frame 10 and the lower end thereof is supported. It is attached to the base 40.
In addition, a flange portion (not shown) bent inward in the left and right direction is formed at the outer edge portion of the connecting bracket 11 when viewed from the side surface side of the seat to enhance the support rigidity of the back frame 10 and the support base 40.

The upper end portion of the connecting bracket 11 is disposed so as to be sandwiched between the back frame 10 and the cushion frame 20 in the seat left-right direction.
A back rotation shaft 12 pivotally supported by a support base 40 in the left-right direction is provided at a lower end portion of the left connecting bracket 11, and a back frame with respect to the support base 40 is provided at a lower end portion of the right connecting bracket 11. A reclining device 13 that rotatably connects the 10 is attached.

As shown in FIG. 2, the back rotation shaft 12 includes a front lower rail fixing portion 4c and a rear lower rail fixing portion 4c even when the upper rail 4b slides rearmost with respect to the lower rail 4a. It is located between the seats and secures the support rigidity of the seat body.
Further, as shown in FIG. 3, the back rotation shaft 12 is disposed rearward of the lower rail fixing portion 4c on the front side even when the upper rail 4b slides on the most front side with respect to the lower rail 4a. , The support rigidity of the seat body is secured.

The reclining device 13 is made of a known device, and is arranged on the left and right inner side surfaces of the connecting bracket 11, as shown in FIG. 2, and suppresses the interference with the cushion frame 20 in the left-right direction.
The reclining device 13 mainly includes a back rotation shaft 13a and a spiral spring 13b that rotates the back frame 10 forward about the back rotation shaft 13a and urges the back frame 10 to the stored state.
The back rotation shaft 13a is axially supported on the back frame 10 side and the support base 40 side in the left-right direction, and one end of the spiral spring 13b is locked to the back frame 10 side and the other end thereof is the support base 40. It is locked to the side.
The reclining device 13 can be switched to a locked state that locks the rotating operation of the back frame 10, locks the back frame 10 in an upright state, and unlocks the locked state by operating an operation lever (not shown). The back frame 10 can be rotated forward by the biasing force of the spiral spring 13b to be folded toward the support base 40 side.

The cushion frame 20 is composed of a substantially rectangular frame body that serves as a skeleton of the seat cushion 2. As shown in FIG. 2, the left and right side frames 21 arranged on the left and right sides and the front portion of each side frame 21 are provided. From a front connecting pipe 22 that connects, a central connecting pipe 23 that connects substantially central portions in the front-rear direction of each side frame, and a pan frame 24 as a plate-shaped frame that connects the front connecting pipe 22 and the central connecting pipe 23, It is mainly composed.
The side frame 21 is formed of a sheet metal member extending in the front-rear direction, the front portion thereof is connected to the front connecting pipe 22, and the cushion frame 20 is rotated with respect to the back frame 10 at the rear portion and the upper end portion thereof. A cushion lock device 25 that is movably connected is attached.
In addition, a flange portion (not shown) bent outward in the left and right direction is formed at the outer edge portion of the side frame 21 as viewed from the side surface side of the seat, and the support rigidity of the front connecting pipe 22 and the back frame 10 is enhanced.

The cushion lock device 25 is a known device, and as shown in FIG. 2, includes a cushion rotation shaft 25a and a spiral spring 25b for urging the cushion frame 20 downward with the cushion rotation shaft 25a as a center. I have it.
The cushion rotating shaft 25a is axially supported by the back frame 10 and the cushion frame 20 in the left-right direction, and one end of the spiral spring 25b is locked to the back frame 10 side and the other end is to the cushion frame 20 side. It is locked.
The cushion lock device 25 can be switched to a lock state in which the rotating operation of the cushion frame 20 is locked.
As shown in FIG. 6C, the cushion lock device 25 is a cushion lock device 25 when the seat body is stored on the storage floor, specifically, when the back frame 10 is folded to the cushion frame 20 side. The rotation operation of the frame 20 is locked. Then, as shown in FIG. 8, when the support leg 30 functioning as an operation lever is pulled, the locked state is released, and the cushion frame 20 is rotated downward with respect to the back frame 10 by the urging force of the spiral spring 25b. You can

As shown in FIG. 2, the front connecting pipe 22 is formed of a substantially U-shaped pipe member, and has leg locking devices 26 rotatably connecting the support legs 30 to the cushion frame 20 on the left and right inner side surfaces thereof. Is attached.
The leg lock device 26 includes a leg rotation shaft 26a and a spring member 26b that urges the support leg 30 on the side opposite to the cushion frame 20 about the leg rotation shaft 26a, in other words, in a direction away from the cushion frame 20. And are equipped with.
The leg rotation shaft 26a is axially supported by the front connecting pipe 22 and the upper end of the support leg 30 in the left-right direction, and one end of the spring member 26b is locked to the cushion frame 20 side and the other end thereof is It is locked to the support leg 30 side.
The leg lock device 26 can be switched to a lock state that locks the rotational movement of the support leg 30, and when the leg lock device 26 is in the stored state, specifically, as shown in FIG. Locks the pivotal movement of the support leg 30 when is separated from the leg holding member. Then, as shown in FIG. 8, when the locked support leg 30 is pulled, the locked state is released, and the support leg 30 is attached to the leg holding member 50 so as to return to the seatable state by the biasing force of the spring member 26b. It can be moved to a mountable position.

As shown in FIG. 2, the support leg 30 is a substantially U-shaped pipe member that supports the seat cushion 2, and includes a leg body portion 31 arranged on the left and right sides and a lower end portion of each leg body portion 31. The leg connection part 32 which connects is provided.
The upper ends of the leg body portions 31 are connected to the left and right inner side surfaces of the cushion frame 20 and substantially the center portion in the front-rear direction, and the substantially center portion of the leg connecting portion 32 in the left-right direction is detachable from the leg holding member 50. Is held.
The lower end of the support leg 30 is disposed below the upper end of the lower rail 4a, as shown in the front view of FIG.

The support base 40 is a member that supports the seat back 1, and as shown in FIG. 3, the left and right side base parts 41 arranged along the upper rails 4b on the left and right sides, and the front part of each side base part 41. A first base connecting portion 42, a second base connecting portion 43 connecting substantially central portions of the side base portions 41, left and right reinforcing base portions 44 attached to the upper surface of each side base portion 41, The 1st base connection part 42 and the 2nd base connection part 43 are connected, and the holding member support part 45 which supports the leg holding member 50 is provided.
The support base 40 is covered from above by a base cover 60 shown in FIG.

The side base portion 41 is made of a substantially crank-shaped sheet metal member that is long in the front-rear direction, and as shown in FIG. 3, a connecting wall portion 41a connected to the upper surface of the upper rail 4b and left and right inner end portions of the connecting wall portion 41a. Is mainly composed of an inner side wall portion 41b bent downward from and an outer side wall portion 41c bent upward from left and right outer end portions of the connecting wall portion 41a.
In the side base portion 41, flange portions 41d and 41e that are bent inward in the left-right direction are formed at the lower end portion of the inner side wall portion 41b and the upper end portion of the outer side wall portion 41c, respectively.
Further, a cutout portion 41f is formed in a portion of the left side base portion 41 facing the back rotation shaft 12 when viewed from the seat side surface side, and the back rotation shaft 12 is connected from the seat side surface side. It is easily assembled to the bracket 11 and the reinforcing base portion 44.
The cutout portion 41f is cut out in a substantially semicircular shape from the upper surface of the side base portion 41 downward.

As shown in FIG. 3, the first base connecting portion 42 and the second base connecting portion 43 are formed of substantially circular pipe members extending in the left-right direction, and are separated by a predetermined distance in the front-rear direction. Further, as shown in the front view of FIG. 4, it is arranged at a position overlapping the lower rail 4a and the upper rail 4b in the vertical direction.
As shown in FIG. 3, the reinforcing base portion 44 is made of a substantially crank-shaped sheet metal member that is long in the front-rear direction, and has a connecting wall portion 44a connected to the upper surface of the side base portion 41, and left and right inner sides of the connecting wall portion 44a. The inner wall portion 44b is bent downward from the end portion, and the outer wall portion 44c is bent upward from the left and right outer end portions of the connecting wall portion 44a.
A flange portion 44d bent leftward and rightward is formed at a lower end portion of the inner side wall portion 44b of the reinforcing base portion 44, and a flange portion 44e bent outwardly leftward and rightward is formed at an upper end portion of the outer wall portion 44c. Has been formed.

The left and right ends of the first base connecting portion 42 and the second base connecting portion 43 are connected so as to be sandwiched between the side base portion 41 and the reinforcing base portion 44, as shown in FIG. The side base portion 41 is connected so as to be surrounded by the inner side wall portion 41 b and the flange portion 41 d and the reinforcing base portion 44 and the flange portion 44 d.
The reinforcing base portion 44 is attached to the side base portion 41 at the connecting wall portion 44a, and the flange portion 44e and the flange portion 41e of the side base portion 41 overlap each other in the vertical direction to form a closed cross-section structure. Therefore, the support rigidity of the support base 40 is improved.
In other words, the support base 40 has the middle shape. Therefore, the support rigidity of the support base 40 is improved.

The left reinforcing base portion 44 is sandwiched and connected between the connecting bracket 11 and the side base portion 41 in the left-right direction.
As shown in the front view of FIG. 4, the reinforcing base portion 44 is arranged at a position overlapping the lower rail 4a and the upper rail 4b in the left-right direction.

As shown in FIG. 3, the holding member support portion 45 is a curved sheet metal member that supports the leg holding member 50, and is bent downward in the substantially central portion in the seat front-rear direction than in the front portion and the rear portion. The bent portion 45a is formed.
A front portion of the holding member support portion 45 is attached to the first base connecting portion 42, and a rear portion of the holding member support portion 45 is attached to the second base connecting portion 43.
The leg holding member 50 is attached to the upper surface of the bent portion 45a.

The leg holding member 50 is formed of a substantially U-shaped clip member that detachably holds the support leg 30, and as shown in FIG. 3, a pair of side wall portions 51 and a connecting portion that connects the lower end portions of the side wall portions 51. And a wall portion 52.
Each side wall portion 51 is bent in a direction in which the side wall portions 51 approach each other from the lower end portion toward the upper end portion, in other words, is bent in the opening inner direction so as to narrow the opening portion of the leg holding member 50, and the upper end portion. A curl portion 53 that is bent in the outward direction of the opening is formed in the.
The connecting wall portion 52 has a curved shape and is attached along the bent portion 45 a of the holding member support portion 45. More specifically, the connecting wall portion 52 has a cut-and-raised portion (not shown) which is cut and raised, and the cut-and-raised portion is hooked to a hook groove (not shown) formed in the bent portion 45a. It is installed in.

The leg holding member 50 is supported by the holding member support portion 45 at a position tilted backward at a predetermined tilt angle with respect to the horizontal plane. In other words, the leg holding member 50 is supported by the holding member support portion 45 at a position where the opening portion of the leg holding member 50 faces forward and obliquely upward.
The leg holding member 50 is formed such that the width of the opening portion thereof is slightly smaller than the width diameter of the support leg 30, and elastically deforms the leg holding member 50 to detachably hold the support leg 30.

An inertial locking device 54 that locks the support leg 30 in a state of being held by the leg holding member 50 at the time of a rear collision of the vehicle is arranged in a portion adjacent to the leg holding member 50.
The inertia lock device 54 is a known device, is attached to the support base 40, and is disposed between the first base connecting portion 42 and the second base connecting portion 43 in the front-rear direction as shown in FIG. There is.
As shown in the perspective view of FIG. 2, the leg holding member 50 is disposed rearward of the front end portion of the upper rail 4b, and as shown in the front view of FIG. 4, the lower rail 4a or the upper rail 4b is arranged in the vertical direction. It is located in a position that overlaps with.

The base cover 60 is a resin member that covers the entire support base 40 from above, and as shown in FIG.
The guide portion 61 has a recessed shape that is recessed downward from the upper surface of the base cover 60, and is formed on an inclined portion 61a that is inclined downward from the front end portion toward the rear and a bottom portion that is continuous from the inclined portion 61a. And an opening 61b.
The leg holding member 50 is attached to the base cover 60 by the curl portion 53 being exposed to the outside from the opening 61b and being hooked to the guide portion 61.
The support leg 30 is guided by the inclined portion 61a of the guide portion 61 and can be attached to the leg holding member 50 exposed from the opening 61b.

  Next, the operation of moving the vehicle seat S from the seatable state to the stored state will be described with reference to FIGS. 5 and 6. 5 and 6, the reclining device 13, the cushion lock device 25, and the leg lock device 26 are in a locked state when shown by black circles, and in an unlocked state when shown by white circles. Shall be shown. The same applies to FIGS. 7 and 8.

When the vehicle seat S is in the seatable state shown in FIG. 5A, the seat back 1 is supported by the support base 40 and is locked in the standing state by the reclining device 13, and the seat cushion 2 holds the legs. It is configured to be supported by the support legs 30 held by the member 50.
The leg rotation shaft 26a at the upper end of the support leg 30 is arranged in front of the seat with respect to the leg holding member 50 when it is in a seatable state.

When moving the vehicle seat S from the seatable state to the stored state, for example, an operation lever (not shown) provided on the upper surface of the seat back 1 is operated.
As the occupant operates the operation lever, the locked state of the reclining device 13 is released, and the seat back 1 moves the seat cushion 2 to the storage floor by the urging force of the spiral spring 13b. Rotation starts on the front side of the seat about the back rotation shaft 13a so as to move the seat.
The support leg 30 starts to rotate with respect to the seat cushion 2 toward the seat cushion 2 side about the leg rotation shaft 26a in association with the rotation of the seat back 1. At this time, since the support leg 30 is in a stretched state between the seat cushion 2 and the vehicle body floor side, the seat cushion 2 and the seat back 1 can be stably moved.
A known cable (not shown) is connected between the operation lever and the reclining device 13, and the cable is pulled by the operation of the operation lever to release the locked state.

As shown in FIG. 6A, when the seat back 1 reaches a predetermined rotation position, the support leg 30 is separated from the leg holding member 50. In other words, the support leg 30 is separated from the leg holding member 50 when the support leg 30 reaches a predetermined rotation position in association with the rotation of the seat back 1.
At this time, the support leg 30 is locked by the leg lock device 26 in a state of being folded toward the seat cushion 2 side.

Further, as shown in FIG. 6B, when the seat back 1 reaches a predetermined rotation position, the front end portion of the seat cushion 2 comes into contact with the storage floor surface before the support legs 30.
Sliding members (not shown) that are slidable with respect to the storage floor surface are attached to the front and rear ends of the seat cushion 2, and the seat cushion 2 faces the front side of the seat as the seat back 1 rotates. The storage floor surface can be slid stably.
The sliding member may be attached to at least one of the front and rear ends of the seat cushion 2.

By the series of operations described above, as shown in FIG. 6C, the seat body is stored on the storage floor, and the vehicle seat S is switched to the stored state.
The seat cushion 2 is locked by the cushion lock device 25 in the stored state, specifically, in the state in which the seat back 1 is folded to the seat cushion 2 side.
The support leg 30 is arranged at a lower position than the leg holding member 50 in the housed state.

Next, the operation of moving the vehicle seat S from the stored state to the tip-up state will be described with reference to FIG.
When the vehicle seat S is in the stored state shown in FIG. 7A, for example, an occupant manually raises the seat body upward to switch to the tip-up state shown in FIG. 7B.
At this time, since the cushion lock device 25 locks the rotational movement of the seat cushion 2, the seat cushion 2 can be integrally lifted upward by raising the seat back 1 upward.
In the tip-up state, by sliding the upper rail 4b to the seat rear side with respect to the lower rail 4a, a wide luggage compartment space can be secured on the seat front side.

  When the vehicle seat S is switched to the tip-up state shown in FIG. 7B, the seat back 1 is returned to the same position as the seatable state, and is locked by the reclining device 13 in the upright state. .

Next, the operation of moving the vehicle seat S from the tip-up state to the seatable state will be described with reference to FIG.
When moving the vehicle seat S from the tip-up state to the stored state, as shown in FIG. 8A, for example, the support leg 30 functioning as an operation lever is operated.
The lock state of the cushion lock device 25 and the leg lock device 26 is released by causing the occupant to rotate the support leg 30 upward about the leg rotation shaft 26a, in other words, pull the support leg 30 in a direction away from the cushion frame 20. It
A known cable (not shown) is connected between the support leg 30 and the cushion lock device 25, and the cable is pulled by the operation of the support leg 30 to release the locked state. .

When the cushion lock device 25 is released, the seat cushion 2 is rotated downward with respect to the seat back 1 by the urging force of the spiral spring 25b as shown in FIG. 8B.
With the release of the leg lock device 26, the support leg 30 is rotated about the leg rotation shaft 26a to a position where it can be attached to the leg holding member 50 by the biasing force of the spring member 26b, and is attached to the leg holding member 50. Will be.
By the series of operations described above, the vehicle seat S returns to the seatable state shown in FIG. 8B.

In the above embodiment, the support base 40 of the vehicle seat S is configured to rotatably support the seat back 1 via the connecting bracket 11 as shown in FIG. 2, but the present invention is not limited to this. Alternatively, the connecting bracket 11 may be unnecessary, and the seat back 1 may be directly rotatably attached to the support base 40.
Further, in the above-described embodiment, the support base 40 and the connecting bracket 11 are different components, but the support base 40 may of course have a configuration including the connecting bracket 11.

In the above-described embodiment, the leg holding member 50 is arranged on the rear side of the seat with respect to the vehicle body floor with respect to the step portion connected to the storage floor, as shown in FIG. 5.
With this configuration, the support leg 30 held by the leg holding member 50 can be compactly arranged. Further, the support leg 30 supports the seat cushion 2 at the substantially central portion in the front-rear direction, so that the support rigidity of the seat cushion 2 can be increased.
The vehicle body floor includes the stepped portion and does not include the storage floor.

  In the above-described embodiment, the cushion lock device 25 can be switched to a lock state that locks the rotational movement of the seat cushion 2 in the stored state, as shown in FIG. 6C, but is not limited to this. Instead, the configuration may be changed to the locked state in the tip-up state shown in FIG. 7B.

  In the above-described embodiment, a storable vehicle seat used in an automobile has been described as a specific example, but the present invention is not limited to this, and in addition to vehicle seats such as trains and buses, vehicle seats such as airplanes and ships. Can also be used as

In the present embodiment, the vehicle seat S according to the present invention has been mainly described.
However, the above embodiments are merely examples for facilitating the understanding of the present invention, and do not limit the present invention. The present invention can be modified and improved without departing from the spirit of the invention, and it goes without saying that the present invention includes equivalents thereof.
In particular, the shapes, arrangements, and configurations of the support legs 30, the support base 40, and the leg holding members 50 described in the above embodiment are merely examples, and do not limit the present invention.

S Vehicle seat 1 Seat back 1a, 2a, 3a Cushion pad 1b, 2b, 3b Skin 2 Seat cushion 3 Headrest 4 Rail device 4a Lower rail 4b Upper rail 4c Lower rail fixing part 10 Back frame 11 Connecting bracket 12 Back pivoting shaft 13 Reclining device 13a Back rotation shaft 13b Swirl spring 20 Cushion frame 21 Side frame 22 Front connection pipe 23 Central connection pipe 24 Pan frame 25 Cushion lock device 25a Cushion rotation shaft 25b Swirl spring 26 Leg lock device 26a Leg rotation shaft 26b Spring member 30 Support leg 31 Leg body portion 32 Leg connection portion 40 Support base 41 Side base portion 41a Connection wall portion 41b Inner side wall portion 41c Outer side wall portion 41d, 41e Flange portion 41f Cutout portion 42 1 Base connection part 43 2nd base connection part 44 Reinforcement base part 44a Connection wall part 44b Inner side wall part 44c Outer side wall part 44d, 44e Flange part 45 Holding member support part 45a Bending part 50 Leg holding member 51 Side wall part 52 Connection wall part 53 curl portion 54 inertial locking device 60 base cover 61 guide portion 61a inclined portion 61b opening portion

Claims (9)

A seat back, and a seat cushion connected to the seat back, a vehicle seat capable of being stored in a storage floor formed at a position lower than a vehicle body floor,
A support base provided on the vehicle body floor, disposed below the seat cushion, and rotatably connected to a lower end side of the seat back;
A base cover for covering the support base from above,
The base cover includes a recessed portion that is recessed downward from the upper surface ,
The vehicle seat, wherein the recess is arranged at a central position of the vehicle seat in the seat width direction .   The vehicle seat according to claim 1, wherein the recessed portion has a pair of left and right side wall portions and a bottom wall portion.   The vehicle seat according to claim 1 or 2, wherein the recess is integrally formed in a front portion of the base cover. The lower end side of the seat back is pivotally supported on the support base by a back rotation shaft,
The vehicle seat according to any one of claims 1 to 3, wherein the back rotation shaft is arranged behind the recess in the seat front-rear direction. The lower rail fixed to the vehicle body floor and extending in the seat front-rear direction,
The vehicle seat according to claim 4, wherein the recess is arranged between the back rotation shaft and a lower end of the lower rail in a seat vertical direction. On the rear side of the base cover, a notch portion cut out on the front side is provided ,
The vehicle seat according to any one of claims 1 to 5, wherein the recessed portion is arranged on a front side in the seat front-rear direction with respect to the notch .   A portion of the base cover that corresponds to the back rotation shaft is raised more than a front end portion and a rear end portion of the base cover, and inclined portions are formed in front of and behind the raised portion, respectively. The vehicle seat according to claim 5, further comprising: The support base includes left and right side base parts, and a first base connecting part that connects front parts of the left and right side base parts,
The vehicle seat according to any one of claims 1 to 7, wherein a central portion of the first base connecting portion is arranged on a front side of a bottom surface portion of the recess. A second base connecting portion that connects the substantially central portions of the left and right side base portions,
A lower rail fixed to the vehicle body floor and extending in the seat front-rear direction,
An upper rail slidably supported along the lower rail,
9. The vehicle seat according to claim 8, wherein the first base connecting portion and the second base connecting portion are arranged at positions overlapping the lower rail and the upper rail in the vertical direction.

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