JP7381854B2 - vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat, and particularly to a vehicle seat that can be slid by a slide rail.

2. Description of the Related Art Vehicles include vehicle models that have a luggage compartment area at the rear of the vehicle interior, such as one-box cars. In such vehicles, a rear seat is slidably attached to the vehicle body floor immediately in front of the cargo area via a slide rail so as to be able to move forward or backward in order to expand the cargo space.
The slide rail is a slideable combination of a lower rail fixed to the vehicle body floor and an upper rail fixed to the rear seat, and the distance over which the rear seat can move forward and backward is determined by the length of the lower rail.

Further, such a rear seat includes a seat cushion provided on an upper rail, and a seat back that can be displaced into an upright position and a forward-leaning position with respect to the seat cushion.
The area in which a seat (hereinafter sometimes referred to as a seat body), which can be sat on by placing the seat back in an upright position, can slide in the front and back direction is referred to as a seating area. The seating area is located just in front of the luggage compartment area, and the luggage compartment area is configured to be expanded and used when the luggage to be loaded in the luggage compartment area is large. Specifically, the lower rail of the slide rail is extended further forward than the normal seating area to expand the cargo area, and the rear seat can be moved along the lower rail to the expanded area in front.

When the lower rail is extended, the occupant can sit on the seat even if the seat is moved from the seating area to the enlarged area while the seatback remains erect. However, vehicles are equipped with seat belt devices to restrain the occupants seated in the seats, and seat belt devices usually effectively restrain the occupants for the seats located in the seating area. do. In order to ensure the safety of a seatbelt, the area in which it can be secured while seated is sometimes restricted by law, and for this reason, conventionally, the position of the seat can be regulated only in the seating area by a locking mechanism.

Patent Document 1 discloses that the seat can be moved from the seating area to the enlarged area, and when the seat back is folded forward, the seat cushion can be slid to the enlarged area ahead of the normal seating area. A vehicle seat device is disclosed. The vehicle seat disclosed in Patent Document 1 includes a back posture holding device for holding the seat back in a forward tilted posture (retracted state) when the seat cushion is located in the enlarged area.

JP2016-78676A

In the vehicle seat described in Patent Document 1, the seat back is held in a forward tilted position when the seat cushion is located in the enlarged area. However, since the seat cushion located in the enlarged area is movable, the seat cushion moves and creates a gap between the seat cushion and the front seat in front of it, causing luggage in the luggage compartment to fall into that gap. There was a case. For example, when a bicycle or the like is loaded, the front wheel of the bicycle may fall into the gap between the seats, making it difficult to take out the bicycle.

The present invention has been made in view of the above-mentioned problems, and its purpose is to maintain the seat body in a predetermined position with the seat back folded forward even outside the predetermined range for regulating the position of the seat body. An object of the present invention is to provide a vehicle seat whose position can be regulated.

The problem is a vehicle seat that has a seat back and a seat cushion, and is capable of switching between an upright state in which the seat back is upright and a retracted state in which the seat back is folded forward and can be used as a cargo platform. a seat body, a lower rail, and an upper rail supported movably relative to the lower rail, the slide rail for slidingly moving the seat body along the front-rear direction of the vehicle seat; a locking mechanism that regulates the position of the rail within a predetermined range; and an auxiliary lock that regulates the position of the upper rail when the seat body in the stored state moves in the front-rear direction beyond the predetermined range and reaches a predetermined position. mechanism, the auxiliary locking mechanism includes a convex part provided on the lower rail, and a hook part rotatably provided on the upper rail, and the convex part extends from the rear side to the front side. has an inclined surface that slopes upward as the upper rail moves forward, and the hook part rides over the convex part, and the hook part engages with the convex part, This problem is solved by regulating the position of the upper rail .

According to the above-mentioned vehicle seat, apart from the locking mechanism that regulates the position of the upper rail within a predetermined range, when the seat body in the stored state moves in the longitudinal direction beyond a predetermined range and reaches a predetermined position. It is equipped with an auxiliary locking mechanism that regulates the position of the upper rail. Therefore, even outside the predetermined range in which the position of the seat body is regulated, the seat body in the stored state with the seat back folded forward can be regulated at a predetermined position.
When the cargo space is expanded, the stored seat body, which can be used as a cargo platform, is positioned at a predetermined location, such as a position where the tip of the seat body is close to the seat in front, so that cargo may fall. This suppresses the occurrence of gaps between sheets. The seat body, whose position is regulated at a predetermined position beyond the predetermined range, is in a stored state where the seat back is folded forward and can be used as a cargo space, so the space where the vehicle seat is located can be used as a cargo space. The state will now be maintained.
Furthermore, the above configuration allows the position of the upper rail to be reliably regulated with a simple structure.
Further, with the above configuration, the trajectory of the auxiliary locking mechanism is smoothed by the back and forth movement of position regulation by the auxiliary locking mechanism, and the sliding movement of the seat body can be made smooth.

In the vehicle seat described above, the auxiliary locking mechanism may be configured to release the position restriction of the upper rail in conjunction with a release operation of the locking mechanism.
With the above configuration, the occupant can easily release the position restriction of the auxiliary lock mechanism by releasing the position restriction of the auxiliary lock mechanism by the same release operation as the lock mechanism even when the position is outside the predetermined range.

In the vehicle seat described above, when the seat body is in an upright state, the upper rail may not be positionally restricted by the auxiliary locking mechanism.
With the above configuration, when the seat body in the upright state is outside the predetermined range, it can be smoothly moved back and forth.

In the vehicle seat described above, it is preferable that the position restriction of the auxiliary lock mechanism is released by bringing the seat body, which is in a stored state and whose position is restricted by the auxiliary lock mechanism, into an upright state.
With the above configuration, the position restriction of the auxiliary locking mechanism can be released by a simple operation.

The vehicle seat described above may preferably include a plurality of lock release means for releasing the position restriction of the auxiliary lock mechanism from a state in which the seat body in the retracted state is positionally restricted by the auxiliary lock mechanism.
With the above configuration, the occupant can select and use a plurality of lock release means depending on the situation to release the position restriction of the auxiliary lock mechanism.

In the vehicle seat described above, the position of the auxiliary lock may be controlled by pulling a strap attached to the rear of the seat cushion or a wire connected to an operation knob provided on the seat back.
With the above configuration, it is possible to reliably release the position restriction of the auxiliary locking mechanism with a simple configuration.

In the vehicle seat described above, it is preferable that there be a plurality of wires used in the lock release means.
The above configuration allows multiple operations to be activated separately.

In the vehicle seat described above, it is preferable that the locking mechanism and the auxiliary locking mechanism are configured not to restrict the position of the upper rail at the same time.
With the above configuration, the seat body can be smoothly moved in the back and forth sliding motion, and the position can be efficiently regulated.

According to the above-mentioned vehicle seat, apart from the locking mechanism that regulates the position of the upper rail within a predetermined range, when the seat body in the stored state moves in the longitudinal direction beyond a predetermined range and reaches a predetermined position. It is equipped with an auxiliary locking mechanism that regulates the position of the upper rail. Therefore, even outside the predetermined range in which the position of the seat body is regulated, the seat body in the stored state with the seat back folded forward can be regulated at a predetermined position.
When the cargo space is expanded, the stored seat body, which can be used as a cargo platform, is positioned at a predetermined location, such as a position where the tip of the seat body is close to the seat in front, so that cargo may fall. This suppresses the occurrence of gaps between sheets. The seat body whose position is restricted at a predetermined position beyond the predetermined range is in a retracted state where the seat back is folded forward and can be used as a cargo area, so the space where the vehicle seat is located is in a state where it can be used as a cargo space. will be maintained.
Further, with the above configuration, even if the position is outside the predetermined range, the position restriction of the auxiliary lock can be released by performing a release operation of the lock mechanism.
Further, with the above configuration, when the seat body in the upright state is outside the predetermined range, it can be smoothly moved back and forth.
Furthermore, with the above configuration, the restriction on the auxiliary locking mechanism can be released by an easy operation.
Further, with the above configuration, the occupant can select and use a plurality of lock release means depending on the situation to release the position restriction of the auxiliary lock mechanism.
Moreover, with the above configuration, it is possible to reliably release the position restriction of the auxiliary locking mechanism with a simple configuration.
Furthermore, since there are a plurality of wires used in the lock release means, a plurality of operations can be performed separately.
Moreover, with the above configuration, the position can be reliably regulated with a simple structure.
With the above configuration, the trajectory of the auxiliary locking mechanism can be smoothed by the back and forth movement of position regulation by the auxiliary locking mechanism, and the sliding movement of the seat can be smoothed.
With the above configuration, the seat body can be smoothly moved in the back and forth sliding motion, and the position can be efficiently regulated.

1 is a side view of a vehicle seat according to an embodiment of the present invention. 2 is an enlarged view showing part A of FIG. 1. FIG. FIG. 3 is a plan view of the slide rail as seen from arrow Y in FIG. 2; FIG. 2 is a side view showing a state in which the back seat of the vehicle seat is folded forward to be in a stored state to form a luggage compartment area. 5 is a plan view showing the rear portion of the seat cushion, as seen from arrow X in FIG. 4, and a diagram showing a link mechanism. FIG. FIG. 7 is a schematic diagram showing the state of the auxiliary locking mechanism when the seat body in the upright state is at the last position of the slide rail. FIG. 6 is a schematic diagram showing the state of the auxiliary locking mechanism when the seat back is folded forward to a retracted state when the seat body is at the rearmost position. FIG. 6 is a schematic diagram showing a state in which the seat main body in the stored state is moved to the front of the slide rail and the hook part of the auxiliary locking mechanism is in contact with the convex part. FIG. 7 is a schematic diagram showing a state in which the seat main body in the stored state has moved to a predetermined position and the hook portion of the auxiliary locking mechanism has engaged with the front end of the convex portion. FIG. 7 is a schematic diagram showing the state of the auxiliary locking mechanism when the seat body in the upright state is at a predetermined position on the slide rail. FIG. 7 is a schematic diagram showing that the position restriction of the auxiliary lock mechanism is released by raising the seat back from the seat body in the stored state. FIG. 6 is a schematic diagram showing that the position restriction of the auxiliary locking mechanism is released by pulling the strap or operating the operation knob. It is a figure which shows the modification of a convex-shaped part. It is a figure which shows the modification of a convex-shaped part. FIG. 3 is a diagram showing a state in which the position of a vehicle seat without a flap is restricted in an enlarged area.

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

In addition, below, a vehicle seat mounted in a vehicle will be cited as an example of a vehicle seat, and an example of its configuration will be described. However, the present invention is not limited to vehicle seats installed in ground vehicles with wheels such as automobiles and trains, but can also be applied to seats installed in aircraft, ships, etc. that move on areas other than the ground. may be applied.

In addition, in the following description, the "front-back direction" refers to the front-back direction of the vehicle seat (in other words, the front-back direction of the seat body), and is a direction that coincides with the direction in which the vehicle travels. Moreover, the "seat width direction" is the width direction of the vehicle seat (in other words, the width direction of the seat body), and is a direction that coincides with the left-right direction as seen from an occupant seated on the vehicle seat. Moreover, the "vertical direction" refers to the vertical direction of the vehicle seat, and is a direction that coincides with the vertical direction when the vehicle is traveling on a horizontal plane.

In addition, "outside the car" in the seat width direction means the side closer to the outside of the car body (for ease of understanding, the side closest to the nearest door), and "inside the car" means the side closer to the inside of the car body (for ease of understanding, the side closest to the nearest door). Easy means the side farthest from the nearest door).
In addition, in the following description, "rotation" means a rotation movement about an axis along the sheet width direction, unless otherwise specified.

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

The basic configuration of a vehicle seat (hereinafter referred to as vehicle seat S) according to this embodiment will be described with reference to FIG. FIG. 1 is a side view of the vehicle seat S. In FIG. 1, a part of the vehicle seat S is shown with the trim cover T removed for convenience of illustration.

The vehicle seat S is placed on the vehicle body floor FL, and is a seat on which a vehicle occupant sits. In this embodiment, the vehicle seat S is used as a rear seat corresponding to a rear seat of a vehicle. However, the present invention is not limited thereto, and the vehicle seat S can also be used as a second-row middle seat or a third-row rear seat in a vehicle equipped with three rows of seats in the front-rear direction.

As shown in FIG. 1, the vehicle seat S has a seat body Sh forming its main body portion. The seat body Sh includes a seat back 1 serving as a backrest portion that supports the back of the seated person, a seat cushion 2 serving as a seating portion that supports the buttocks of the seated person, and an upper portion of the seat back 1, which supports the head of the seated person. The main component is a supporting headrest 3. The seat back 1 and the seat cushion 2 are connected with a reclining mechanism 19, which will be described later, in between. Further, the seat back 1 is rotatably attached to the vehicle body floor FL via a rear bracket 7, which will be described later. A slide rail 4 is installed at the bottom of the seat body Sh. This slide rail 4 allows the seat body Sh to be attached to the vehicle body floor FL in a state where it can slide in the longitudinal direction of the vehicle seat S.

A seat frame F is provided in the vehicle seat S, and the seat frame F is composed of a seat back frame 10 that is a frame of the seat back 1 and a seat cushion frame 20 that is a frame of the seat cushion 2. has been done.

The seat back frame 10 mainly includes a pipe frame (not shown) made of a pipe processed into a rectangular frame shape, a back panel (not shown), and a backside frame 11.
A pad member P and a trim cover T are provided on the outside of the seat back frame 10 and the seat cushion frame 20, thereby forming a seat back 1 and a seat cushion 2. The pad member P is a urethane base material formed by foam molding using, for example, a urethane foam material, and the trim cover T is made of a material such as cloth or leather.

Further, the seat cushion 2 has a rear end portion connected to a side portion of the seat back 1. Note that a cushion side frame 21 is interposed between the rear end of the seat cushion 2 and the lower end of the seat back 1, as shown in FIG. This cushion side frame 21 is rotatably attached to the seat back 1. Thereby, the seat cushion 2 can rotate together with the seat back 1.

As shown in FIG. 4, the seat body Sh can be stored in a folded state (stored state) on a storage floor Sf formed in front of the seat back by folding the seat back forward. When the seat body Sh is in the stored state, the back side of the seat back 1 faces upward and can be used as a loading platform as shown in FIG. Since the vehicle seat S is in the stored state, a luggage area Ch is formed in the space behind the front seat FS. The storage floor Sf is formed by recessing a part of the vehicle body floor FL (specifically, the part of the vehicle body floor located in front of the seat body Sh when the seat body Sh is in the seating state) downward. It is a recessed space.

The back side frames 11 are frames that are attached to the left and right sides of the pipe frame and extend in the vertical direction. In other words, the backside frame 11 is a frame that is arranged on the outside of the seat of the pipe frame and constitutes the left and right end parts of the seat back frame 10 together with the side parts of the pipe frame. The backside frame 11 is a U-shaped plate frame with a cross section open toward the inside of the seat. The backside frame 11 has an upper part welded to the center of the side of the pipe frame, and is rotatably attached to a rear bracket 7 via a reclining mechanism 19, which will be described later.

The rear bracket 7 is connected to the backside frame 11 at its upper part via a reclining mechanism 19. Further, the rear bracket 7 is bolted to the upper rail 6 of the slide rail 4 at its lower portion.

The slide rail 4 is a device for sliding the seat body Sh along the front-rear direction, and has a known structure (the structure of a general slide rail mechanism). A pair of slide rails 4 are provided under the seat body, and each of the slide rails 4 includes a lower rail 5 fixed on the vehicle body floor FL and an upper rail 6 that is slidable relative to the lower rail 5. The upper rail 6 is slidable with respect to the lower rail 5 fixed to the vehicle body floor FL. The seatback frame 10 is attached to the upper rail 6 via the rear bracket 7, and the seatback frame 10 can move forward and backward with respect to the lower rail 5 together with the upper rail 6. Therefore, the seat body Sh attached to the upper rail 6 moves back and forth as the upper rail 6 slides.

The slide rail 4 is provided with a lock mechanism 30 that locks the sliding movement of the upper rail 6, and a lock mechanism wire 51 (see FIG. 5) that unlocks the lock mechanism 30.

The upper rail 6 is locked by a locking mechanism 30 so that it cannot slide when the passenger is seated (seated state, standing state), and when the passenger performs a predetermined operation, the upper rail 6 is unlocked and slides. It becomes movable. Specifically, as a lock release mechanism, a strap 31 is provided at the rear of the seat cushion 2, and an operation knob 32 is provided at the shoulder of the seat back 1. The strap 31 and the operation knob 32 are connected to the lock mechanism 30 via a lock mechanism wire 51, and the occupant can lock the lock mechanism 30 by pulling the strap 31 or operating the operation knob 32. In other words, the position restriction can be lifted.

Regarding the locking mechanism 30, a general device for regulating the position of the upper rail 6 can be used, so a detailed explanation will be omitted. Furthermore, the range in which the position of the upper rail can be regulated by the lock mechanism 30 is determined as the seating area W1 (the range that moves from the seat body Sh(1) to Sh(2) in FIG. 1). Within the seating area W1, the position of the seat body Sh can be regulated even when the seat body Sh is in an upright state.

On the other hand, the seat body Sh can also slide in the front-rear direction in the range in front of the seating area W1 (enlarged area W2, the range where the seat body moves from state Sh(1) to Sh(3) in FIG. 1). It is possible. However, when the seat body Sh is in the enlarged area W2 (state of the seat body Sh(3)), the position is not restricted by the locking mechanism 30 in a seatable state.
The vehicle seat S of this embodiment is provided with an auxiliary locking mechanism 40 that positions the upper rail 6 of the seat body Sh in the stored state at a predetermined position in the enlarged area W2. Details of the auxiliary locking mechanism 40 will be described later.

A flap 8 is provided at the rear of the seat body Sh. The flap 8 forms part of the luggage compartment of the vehicle. The flap 8 includes a fixed plate 8a that is fixed to the vehicle body and forms part of the luggage compartment, and a rotating plate 8b that is rotatably attached to the front end of the fixed plate 8a at a bending point 8c that is the center of rotation. It consists of The fixed plate 8a is a floorboard that forms part of the lower surface of the luggage compartment. The rotating plate 8b is rotatably connected to the front end of the fixed plate 8a by a bending starting point 8c made of a thin hinge so that it can be bent between an upright position and a collapsed position.

Further, a biasing member (not shown) such as a coil spring is attached to the bending starting point 8c, and the rotating plate 8b is biased toward the seat back 1 by the biasing member. When the occupant folds the seatback 1 forward by the biasing force of the biasing member, as the seatback 1 is tilted forward, the rotary plate 8b is also tilted forward to be in the reclined state. Then, the rotating plate 8b functions as a floorboard when it is laid down. Further, at this time, the seat body Sh remains usable as a loading platform.
A strap 31 protrudes toward the luggage compartment from the vicinity of the bending point 8c, and when the occupant pulls the strap 31, the position restriction of the locking mechanism 30 is released and the seat body Sh can slide in the front-rear direction. Note that by pulling the strap 31, it is possible to release not only the position restriction of the lock mechanism 30 but also the position restriction by an auxiliary lock mechanism 40, which will be described later.

FIG. 5 is a diagram showing the rear part of the seat cushion 2, as seen from the arrow direction X in FIG. 4, with the flap 8 omitted. As shown in FIG. 5, at the rear of the seat cushion 2, a link mechanism 48 is provided as a lock release means for connecting the strap 31 and the locking mechanism wire 51. The link mechanism 48 includes a support plate 50 and a lever 49 rotatably provided on the support plate 50. A strap 31 is connected to one end of the lever 49, and a locking mechanism wire 51 is connected to the other end. By pulling the strap 31, the locking mechanism wire 51 is pulled through the lever 49, thereby causing the locking mechanism to close. 30 position restrictions will be lifted.
Note that the lever 49 is connected to an operation knob wire 52 that is connected to the operation knob 32 and a second wire 45 of an auxiliary locking mechanism 40 that will be described later. Therefore, by pulling the strap 31, the position restriction of not only the lock mechanism 30 but also the auxiliary lock mechanism 40 can be released. Furthermore, by pulling the operation knob 32, the locking mechanism wire 51 of the locking mechanism 30 and the second wire 45 of the auxiliary locking mechanism 40 are pulled, so that the position restriction by the locking mechanism 30 and the auxiliary locking mechanism 40 is also released. It's like that. Further, the lever 49 is configured to return to its original position after being pulled by the strap 31 by a spring 53 provided on the lever 49 and the support plate 50.

The configuration and operation of the auxiliary locking mechanism 40 will be described in detail. The auxiliary locking mechanism 40 is activated when the seat body Sh in the stored state moves forward beyond the position regulation range (seating area W1) of the locking mechanism 30 and reaches a predetermined position on the slide rail 4 (see FIG. 1). This is a device for regulating the position of the upper rail 6 in the state of the seat body Sh(3)).

Conventionally, the position of the seat body Sh was not regulated when it was outside the seating area W1 (enlarged area W2). Therefore, when the vehicle moves, the seat body Sh moves rearward and the gap between it and the front seat FS becomes larger, and for example, the front wheel of a bicycle may fall into the gap and take time to take out.
As shown in Figure 4, by positioning the tip of the seat body Sh in the stored state used as a cargo platform close to the rear of the front seat FS and reducing the gap, it is possible to pass cargo (for example, bicycles) through the gap. (front wheels) from falling.

A specific configuration of the auxiliary lock mechanism 40 provided in the vehicle seat S of this embodiment will be described.
As shown in FIGS. 2 and 3, the auxiliary locking mechanism 40 includes a hook portion 41 rotatably attached to the rear bracket 7, a first wire 44 and a second wire 45 connected to the hook portion 41, and a first wire 44 and a second wire 45 connected to the hook portion 41. It is comprised of a wire holding part 42 that holds the wire 44 and the second wire 45, a convex part 43, and an urging part 46 that urges the hook part 41 to tilt forward.

The hook part 41 is a flat member formed in an N-shape or a Z-shape, and extends toward the front of the vehicle seat S, and includes a key-shaped part 41a having a key-shaped end and an upper part. It has a connecting part 41b that extends toward the end and connects with the first wire 44 and the second wire 45 at the end. A shaft portion 41c, which is the center of rotation, is provided between the key-shaped portion 41a and the connecting portion 41b. The key-shaped portion 41a is biased by a biasing portion 46 in a direction in which it falls forward (in the direction of arrow B in FIG. 2). The biasing portion 46 is composed of, for example, a coil spring.

As shown in FIGS. 1 and 2, the convex portion 43 is provided at a predetermined position in front of the lower rail 5, and has an inclined surface 43a that slopes upward from the rear side to the front side. Further, as shown in FIG. 3, the convex portion 43 is provided to protrude outward from the lower rail 5 in the width direction. As the upper rail 6 moves forward, the key-shaped part 41a of the hook part 41 crosses the slope 43a and engages with the front end of the convex part 43. Since the hook portion 41 is urged to tilt forward by the urging portion 46, the engaged state is maintained and the position of the upper rail 6 is regulated. Thereby, the position of the seat body Sh is regulated.

As shown in FIG. 6A, the first wire 44 has one end connected to the lower end of the seat back frame 10 (backside frame 11), and the other end connected to the connecting part 41b of the hook part 41. One end of the second wire 45 is connected to the strap 31 and the operating knob 32, and the other end is connected to the connecting portion 41b of the hook portion 41 via a link mechanism 48 shown in FIG. The first wire 44 and the second wire 45 are held by the wire holding portion 42 so as to be substantially parallel to each other immediately before being connected to the connecting portion 41b. The tip of the first wire 44 is slidably attached to a first slit 41d formed in the connecting portion 41b. The tip of the second wire 45 is slidably attached to a second slit 41e formed in the connecting portion 41b.

A mechanism for regulating the position of the seat body Sh in the stored state at a predetermined location using the auxiliary locking mechanism 40 will be described with reference to FIGS. 6A to 6D.
FIG. 6A shows the state of the auxiliary locking mechanism 40 when the seat body Sh is located at the rearmost end of the seating area W1 with the seat back 1 upright (state of the seat body Sh(2) in FIG. 1). ing. In this state, the end of the first wire 44 connected to the lower end of the seat back frame 10 is pulled forward. As a result, the other end of the first wire 44 moves rearward, the hook portion 41 of the auxiliary locking mechanism 40 is tilted backward, and the key-shaped portion 41a is in an upwardly floating state (a state above the upper surface of the upper rail 6). Become.

As shown in FIG. 6B, when the seatback 1 is folded forward, the end of the first wire 44 that has been pulled by the lower end of the seatback frame 10 moves rearward, thereby connecting with the auxiliary locking mechanism 40. The end of the first wire 44 is now pushed forward. Since the hooking part 41 is biased by the biasing part 46 so that the connecting part 41b is tilted forward, the tip of the key-shaped part 41a is in a lowered state.

When the seat back 1 is folded forward and the seat body Sh is slid forward with the seat body Sh in the retracted state, the key-shaped portion 41a of the hook portion 41 touches the convex portion 43 provided on the lower rail 5, as shown in FIG. 6C. come into contact with When the seat body Sh is further slid as it is, the key-shaped portion 41a is lifted by the inclined surface 43a of the convex portion 43 (in the direction of arrow C), and the connecting portion 41b of the hook portion 41 is once rotated backward.
Furthermore, when the seat body Sh is slid, the hook portion 41 moves forward, the key-shaped portion 41a is no longer supported by the inclined surface 43a, and the hook portion 41 is urged by the biasing portion 46, so that the key-shaped portion 41a engages with the front end of the convex portion 43. As a result, the movement of the upper rail 6 is restricted, and the position of the seat body Sh in the stored state is restricted.

Note that, as shown in FIG. 6A, when the seat back 1 is in an upright state, the hook portion 41 remains tilted backward by the first wire 44. Thereby, even if the seat main body Sh is moved forward in the upright state, the key-shaped portion 41a will be located above the inclined surface 43a of the convex portion 43, as shown in FIG. Therefore, when the seat back 1 is in an upright state, its position is not restricted by the auxiliary locking mechanism 40.

Next, a mechanism for releasing the restriction from the position restricted by the auxiliary locking mechanism 40 will be described.
FIG. 8A is a diagram showing a state where the position is restricted by the auxiliary locking mechanism 40. At this time, when the seat back 1 is raised, the end of the first wire 44 connected to the seat back frame 10 is pulled forward. As a result, the end of the first wire 44 connected to the auxiliary locking mechanism 40 moves rearward, and the connecting part 41b of the hook part 41 tilts backward. The engagement between the key-shaped portion 41a of the hook portion 41 and the convex portion 43 is released, and the upper rail 6 becomes movable rearward. In this way, the occupant can release the position restriction of the auxiliary locking mechanism 40 by simply raising the seat back 1.

Further, the auxiliary locking mechanism 40 can be released not only when the seatback 1 is raised, but also when the seatback 1 is in the retracted state.
As shown in FIG. 8B, the hook portion 41 is also connected to the second wire 45. As described above, the second wire 45 is also connected to the strap 31 and the operating knob 32 via the link mechanism 48 as shown in FIG. 5, and by pulling the strap 31 or operating the operating knob 32, The second wire 45 is pulled. Thereby, as shown in FIG. 8B, the connecting portion 41b of the hook portion 41 is tilted backward (in the direction of arrow C). Although the seat body Sh is in the retracted state, the engagement between the key-shaped portion 41a of the hook portion 41 and the convex portion 43 is released. In this manner, the occupant can release the positional restriction of the auxiliary locking mechanism 40 by the same releasing operation as releasing the restriction of the locking mechanism 30.
In this way, the vehicle seat S of this embodiment has a plurality of lock release means, and the occupant can release the position restriction of the auxiliary lock mechanism 40 by selecting and using the lock release means depending on the situation. can do.

In the auxiliary locking mechanism 40 of this embodiment, the inclined surface 43a of the convex portion 43 is formed in a straight line, but this is just an example, and it may have another shape. The portion that contacts the hook portion 41 may be formed in an arc shape that bulges upward like the inclined surface 143a of the convex portion 143 shown in FIG. 9A.
Alternatively, the sloped surface 243a of the convex portion 243 shown in FIG. 9B may be formed in a stepped shape. That is, by making the inclined surface 243a step-like, a plurality of places are formed where the key-shaped part 41a of the hook part 41 is locked, and a plurality of places where the position of the upper rail 6 is regulated by the auxiliary locking mechanism 40 are formed. It can be done.
Furthermore, although the convex portion 43 in this embodiment is provided in front of the slide rail, the convex portion 43 is provided in the rear of the slide rail 4, and an enlarged area W3 (see FIG. 1) is provided at the rear of the seating area W1. ), the position of the upper rail 6 may be restricted.
In that case, the convex portion 43 has a slope that slopes upward as it goes from the front side to the rear side.
In the case of the vehicle seat S2 without the flap 8 shown in FIG. 10, a flexible material (skin material 54) such as needle punch is arranged on the back surface of the seat back 1. By regulating the position of the seat body Sh in the enlarged area W3 by the auxiliary locking mechanism 40, it is possible to suppress the receiving surface of the loading platform from falling down due to the weight of people, loading platforms, etc.

S, S2 Vehicle seat (vehicle seat)
Sh Seat body T Trim cover P Pad member 1 Seat back 2 Seat cushion 3 Headrest 4 Slide rail 5 Lower rail 6 Upper rail 7 Rear bracket 8 Flap 8a Fixed plate 8b Swivel plate 8c Folding point F Seat frame 10 Seat back frame 11 Back side Frame 19 Reclining mechanism 20 Seat cushion frame 21 Cushion side frame 30 Locking mechanism 31 Strap 32 Operation knob 40 Auxiliary locking mechanism 41 Hook portion 41a Key-shaped portion 41b Connecting portion 41c Shaft portion 41d First slit 41e Second slit 42 Wire holding portion 43 , 143, 243 Convex portion 43a, 143a, 243a Inclined surface 44 First wire 45 Second wire 46 Biasing portion 48 Link mechanism 49 Lever 50 Support plate 51 Lock mechanism wire 52 Operation knob wire 53 Spring 54 Skin material W1 Seating area W2, W3 Expanded area Ch Luggage area FL Vehicle floor FS Front seat Sf Storage floor

Claims (10)

A vehicle seat,
a seat body having a seat back and a seat cushion, and capable of switching between an upright state in which the seat back is erected and a retracted state in which the seat back is folded forward and can be used as a cargo platform;
A slide rail that has a lower rail and an upper rail that is supported so as to be movable relative to the lower rail, and that slides the seat body along the front-rear direction of the vehicle seat;
a locking mechanism for regulating the position of the upper rail within a predetermined range;
an auxiliary locking mechanism that regulates the position of the upper rail when the seat body in the stored state moves in the front-rear direction beyond the predetermined range and reaches a predetermined position ;
The auxiliary locking mechanism includes a convex portion provided on the lower rail and a hook portion rotatably provided on the upper rail,
The convex portion has an inclined surface that slopes upward as it goes from the rear side to the front side, and when the upper rail moves forward and the hook portion climbs over the convex portion, the hook portion crosses over the convex portion. A vehicle seat characterized in that the position of the upper rail is regulated by engaging with a convex portion . 2. The vehicle seat according to claim 1, wherein the auxiliary locking mechanism is configured to release restriction on the position of the upper rail in conjunction with a releasing operation of the locking mechanism. 3. The vehicle seat according to claim 1, wherein when the seat body is in an upright state, the position of the upper rail is not restricted by the auxiliary locking mechanism. Any one of claims 1 to 3, wherein the position restriction of the auxiliary lock mechanism is released by bringing the seat body in a stored state whose position is regulated by the auxiliary lock mechanism into an upright state. Vehicle seats as described in Section. 5. Any one of claims 1 to 4, further comprising a plurality of lock release means for releasing the positional restriction of the auxiliary locking mechanism from a state in which the seat body in the stored state is positionally restricted by the auxiliary locking mechanism. Vehicle seats described in . According to claim 5, the position regulation by the auxiliary locking mechanism is carried out by pulling a wire connected to a strap provided at the rear of the seat cushion or an operation knob provided to the seat back. Vehicle seat as described. 7. The vehicle seat according to claim 6, wherein a plurality of said wires are used for said lock release means. 8. The vehicle seat according to claim 1, wherein the locking mechanism and the auxiliary locking mechanism are configured not to simultaneously restrict the position of the upper rail. lock release means for releasing the positional restriction of the auxiliary locking mechanism from a state in which the seat body in the stored state is positionally restricted by the auxiliary locking mechanism;
a flap disposed at the rear of the seat body,
The lock release means includes a wire connected to the auxiliary locking mechanism, and a strap connected to the wire and extending from the flap,
5. The vehicle seat according to claim 1, wherein position restriction by the auxiliary locking mechanism is released by pulling the strap. The flap is composed of a fixed plate fixed to the vehicle body, and a rotating plate attached to the front end of the fixed plate so as to be rotatable by a bending point that is the center of rotation, and the rotating plate is attached. The vehicle seat according to claim 9, wherein the vehicle seat is biased toward the seat back by a biasing member.

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