JP7011154B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat in which the states of the seat cushion and the seat back can be switched.

Conventionally, as a vehicle seat, the state of the seat cushion and the seat back is overlapped with the normal state when the occupant sits, the dive-down state in which the seat back is folded on the seat cushion, and the upright seat back. It is known that the seat cushion can be switched to the folded tip-up state (see Patent Document 1). Specifically, in this technique, the seat cushion is fixed to an arm rotatably provided on the seat back. Then, by rotating the seat cushion together with the arm to switch from the normal state to the tip-up state, it is possible to effectively utilize the space in front of the vehicle seat.

Japanese Unexamined Patent Publication No. 2009-067309

However, in the prior art, since the heavy seat back must be lifted when switching to chip-up, there is a risk that the operation will be burdensome for a weak user.

Therefore, an object of the present invention is to provide a vehicle seat capable of easily switching the state of the vehicle seat from a normal state to a state in which the space in front can be effectively utilized even by a weak user.

In the present invention that solves the above-mentioned problems, the state of the seat cushion and the seat back is the normal state when the occupant sits, the seat cushion is arranged closer to the floor than the normal state, and the seat cushion. It is a vehicle seat that can be switched to a dive-down state in which the seat back is folded on the top, and is characterized in that the seat cushion is configured to be slidable backward in the normal state. And.

According to this configuration, the space in front of the vehicle seat can be expanded simply by sliding the seat cushion backward from the normal state. Therefore, even a weak user can easily switch the state of the vehicle seat from the normal state to the state in which the space in front can be effectively utilized.

Further, the vehicle seat may include an arm provided on the seat back, and the seat cushion may be supported by the arm so as to be slidable.

According to this, since the position of the seat cushion in the vertical direction can be freely set only by changing the shape of the arm, the seat cushion can be slid and moved satisfactorily.

Further, even if the vehicle seat is provided with a lock mechanism that locks the position of the seat cushion with respect to the arm to the first position corresponding to the normal state and the second position behind the first position. good.

According to this, since the position of the seat cushion is locked to the first position and the second position by the lock mechanism, the vehicle seat can be well held in the normal state and the state where the space in front can be effectively utilized. Can be done.

Further, the locking mechanism may be configured to lock the position of the seat cushion with respect to the arm to at least one position between the first position and the second position.

According to this, the seat cushion can be locked at three or more positions. For example, when an object is to be sandwiched between the front end portion of the seat cushion and the back surface of the vehicle seat in front of the seat cushion, the object to be sandwiched. You can increase the types of.

Further, when the seat cushion is located at the second position, the amount of protrusion of the seat cushion from the seat back to the front may be greater than or equal to the amount of protrusion to the rear.

According to this, since the amount of protrusion of the seat cushion to the rear can be suppressed, it is possible to secure the space in front while suppressing the space behind the seat back from becoming small.

Further, the arm may be rotatably connected to the seat back.

According to this, since the arm can be rotated with respect to the seat back when switching to the dive-down state, it is possible to satisfactorily switch to the dive-down state.

Further, the arm has a first portion connected to the seat back and a second portion supporting the seat cushion, and when in the normal state, the second portion is the first portion. It may be located in front of and below the connecting portion with the seat back.

According to this, it is possible to switch to the dive down state satisfactorily.

Further, the vehicle seat includes a base member that rotatably supports the lower end portion of the seat back frame, and a support member that is rotatably connected to the arm and supports the arm. In the state, the seat cushion may be configured to be slidable rearward with respect to the support member.

According to this, since the seat cushion can slide backward with respect to the support member under the normal state, the seat cushion moves smoothly to the rear as compared with a structure in which the support member moves together with the seat cushion, for example. Can be done.

According to the present invention, even a weak user can easily switch the state of the vehicle seat from the normal state to the state in which the space in front can be effectively utilized.

Further, by providing a locking mechanism that locks the seat cushion at three or more positions, for example, when an object is to be sandwiched between the front end of the seat cushion and the back surface of the vehicle seat in front of the seat cushion, the object to be sandwiched is to be sandwiched. You can increase the types.

Further, by setting the amount of the seat cushion to protrude forward from the seat back at the second position to be equal to or greater than the amount of protrusion to the rear, the space behind the seat back is suppressed from becoming small, and the space in front is secured. be able to.

Further, by rotatably connecting the arm to the seat back, it is possible to satisfactorily switch to the dive-down state.

Further, by arranging the second portion of the arm that supports the seat cushion in front of and below the connecting portion of the arm with the seat back, it is possible to satisfactorily switch to the dive-down state.

Further, by allowing the seat cushion to slide backward with respect to the support member in a normal state, for example, the seat cushion can be smoothly moved to the rear as compared with a structure in which the support member moves together with the seat cushion. can.

It is a figure which shows the vehicle seat in a normal state which concerns on one Embodiment of this invention. It is a figure which shows the vehicle seat in the 1st cushion retracted state. It is a figure which shows the vehicle seat in the 2nd cushion retracted state. It is a figure which shows the vehicle seat in the dive down state. It is a perspective view which shows by disassembling the slide mechanism. The figure (a) showing the state of the slide mechanism and the like in the normal state, the figure (b) showing the state of the slide mechanism and the like in the first cushion retracted state, and the state of the slide mechanism and the like in the second cushion retracted state are shown. It is a figure (c) which shows.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the vehicle seat S as an example of a vehicle seat is a seat used for, for example, a second row seat of a three-row seat, and mainly includes a seat cushion S1 and a seat back S2. I have. In the present invention, front and rear, left and right, and up and down are based on the occupant sitting on the seat.

The seat cushion S1 includes a seat cushion frame (not shown), a seat cushion pad S12, and a skin material S13. The seat cushion frame is a member forming the skeleton of the seat cushion S1 and is made of metal or the like. The seat cushion pad S12 is made of urethane foam or the like and is supported by the seat cushion frame. The skin material S13 is made of synthetic leather, cloth, or the like, and covers the seat cushion pad S12.

The seat back S2 includes a seat back frame S21, a seat back pad S22, and a skin material S23. The seat back frame S21 is a member forming the skeleton of the seat back S2, and is made of metal or the like. The seat back pad S22 is made of urethane foam or the like, and is supported by the seat back frame S21. The skin material S23 is made of synthetic leather, cloth, or the like, and covers the seat back pad S22.

The vehicle seat S is a state in which the states of the seat cushion S1 and the seat back S2 can be switched between the normal state shown in FIG. 1, the cushion retracted state shown in FIGS. 2 and 3, and the dive-down state shown in FIG. It is equipped with a switching mechanism 1. Here, the normal state means a state when the occupant is seated. In the normal state, the upper surface (seat surface) of the seat cushion S1 faces substantially upward, and the front surface (occupant support surface) of the seat back S2 faces substantially forward. Specifically, in the normal state, the direction of the front surface of the seat back S2 is set to an angle according to the preference of the occupant by operating the reclining mechanism 2.

Further, the cushion retracted state means a state in which the seat cushion S1 slides backward from the normal state while the seat back S2 maintains the posture in the normal state. More specifically, in the present embodiment, the vehicle seat S has a first cushion retracted state (state in FIG. 2) in which the position of the seat cushion S1 is separated from the normal state by a first distance D1 and a seat cushion S1. It is possible to switch to the second cushion retracted state (state in FIG. 3) in which the position is separated from the first retracted state by the second distance D2. In the present embodiment, D1 = D2, but the present invention is not limited to this, and D1 ≠ D2 may be used.

Further, the dive-down state means a state in which the seat cushion S1 is arranged closer to the floor F than in the normal state, and the seat back S2 is folded on the seat cushion S1. In the present embodiment, in the dive-down state, the front surface of the seat back S2 is overlapped with the upper surface of the seat cushion S1, and the seat back S2 and the seat cushion S1 are arranged substantially parallel to the upper surface of the floor F. ..

The state switching mechanism 1 includes a seat back frame S21, an arm 10, a support member 20, a base member 30, a slide mechanism 40, and a lock mechanism 50. The seat back frame S21 has left and right side frames S24 arranged apart from each other in the left-right direction. The arm 10, the support member 20, the base member 30, the slide mechanism 40, and the lock mechanism 50 are provided one on each side of the vehicle seat S.

The arm 10 is provided on the seat back S2 and supports the seat cushion S1 so as to be slidable in the front-rear direction via the slide mechanism 40. The left and right arms 10 are arranged inside the left and right seat back frames S21 in the left-right direction. Further, the seat cushion S1 is arranged inside in the left-right direction with respect to the left and right arms 10. The arm 10 is formed in an L shape. Specifically, the arm 10 has a first portion 11 extending along the seat back S2 in a normal state, and a second portion 12 extending forward from the lower end of the first portion 11 to support the seat cushion S1. ing. The first portion 11 is rotatably connected to the seat back S2 about the second axis A2. Specifically, the arm 10 is rotatably connected to the seat back frame S21. The upper end portion of the support member 20 is rotatably connected to the second portion 12 about the first axis A1. The second portion 12 is located in front of and below the connecting portion of the first portion 11 with the seat back S2, that is, the second axis A2 in the normal state. In other words, in the normal state, the first axis A1 is located forward and below the second axis A2.

The lower end of the seat back frame S21 is rotatably supported by the base member 30. The base member 30 is fixed to the floor F so as to project from the upper surface of the floor F.

The lower ends of the left and right side frames S24 are connected by a connecting member S25 extending in the left-right direction. The left and right ends of the connecting member S25 are connected to the left and right base members 30, so that the seat back frame S21 can rotate around the connecting member S25. In the following description, the rotation center of the seat back frame S21 is also referred to as the third axis A3. In the normal state, the third axis A3 is arranged in front of and below the second axis A2, and behind and below the first axis A1.

Further, the lower end portion of the seat back frame S21 is connected to the base member 30 via the reclining mechanism 2. The seat back S2 is locked by the reclining mechanism 2 so as to be held at an angle according to the preference of the occupant. Further, a reclining release lever L1 for releasing the lock by the reclining mechanism 2 is provided on the upper portion of the seat back S2.

Further, the base member 30 has a support hole 31 that supports the lower end portion of the support member 20 so as to be rotatable and slidable. The support hole 31 is provided so as to penetrate the base member 30 in the left-right direction. The support hole 31 is inclined with respect to the front-rear direction so that it is located upward from the front to the rear.

The support member 20 is a member that supports the second portion 12 of the arm 10. The lower ends of the left and right support members 20 are connected by a connecting member 21 extending in the left-right direction. Then, the left and right ends of the connecting member 21 enter into the support holes 31 of the left and right base members 30, and are supported by the support holes 31, so that the support member 20 can rotate around the connecting member 21. Moreover, the slide can be moved. In the following description, the center of rotation of the support member 20 is also referred to as the fourth axis A4. In the normal state, the fourth axis A4 is arranged in front of and below the third axis A3, and in front of and below the first axis A1.

The left and right ends of the connecting member 21, that is, the connecting portion of the supporting member 20 with the base member 30, are supported by the support holes 31 so that they can move substantially in the front-rear direction. The left and right ends of the connecting member 21 are formed in a circular shape in cross-sectional view, are located at the rear position (position in FIG. 1) in the normal state, and are in front of the rear position in the dive-down state. Moreover, it is located at the lower front position (position in FIG. 4). Specifically, the rear position is a position corresponding to the rear end of the support hole 31, and the front position is a position corresponding to the front end of the support hole 31.

In addition, a protrusion for restricting the movement of the end portion of the connecting member 21 may be provided in the support hole 31. This protrusion holds the end of the connecting member 21 in the rear position in the normal state, and when switching from the normal state to the dive-down state, the connecting member 21 of the connecting member 21 until the support member 20 rotates by the first angle from the normal state. It may be configured to regulate the forward movement of the end. Further, instead of the protrusion, for example, a member capable of advancing and retreating is provided at a protruding position protruding into the support hole 31 and a retracting position retracting from the support hole 31, and the movement of the end portion of the connecting member is restricted by this member. Alternatively, it may be tolerated.

The backward rotation of the support member 20 is restricted by the reclining mechanism 2 locking the rotation of the seat back S2 with respect to the base member 30. Specifically, the seat back S2, the arm 10, the support member 20, and the base member 30 are four-node links having one degree of freedom, and the reclining mechanism 2 locks the rotation of the seat back S2, so that the degree of freedom is increased. It becomes a three-section link of 0. Therefore, when the reclining mechanism 2 is locked, the backward rotation of the support member 20 is restricted.

The slide mechanism 40 is a mechanism for making the seat cushion S1 slidable with respect to the arm 10. As shown in FIG. 5, the slide mechanism 40 has a structure similar to that for sliding the vehicle seat S in the front-rear direction, for example, and mainly includes a slider 41 and a rail 42. There is. Since the ball or the like for smoothly sliding the slider 41 with respect to the rail 42 is known, the illustration is omitted and the description thereof will be omitted.

The slider 41 is a long member long in the front-rear direction, and is fixed to the inside of the second portion 12 of the arm 10 in the left-right direction. The slider 41 has a first hole 41A, a second hole 41B, and a third hole 41C. The first hole 41A, the second hole 41B, and the third hole 41C are arranged at intervals along the front-rear direction. The distance between the first hole 41A and the second hole 41B is the same as the above-mentioned first distance D1 (see FIG. 2), and the distance between the second hole 41B and the third hole 41C is the above-mentioned second distance. It has the same size as D2 (see FIG. 3).

The rail 42 is a long member long in the front-rear direction, and is fixed to the side portion of the seat cushion S1. The rail 42 has a larger length in the front-rear direction than the slider 41. A lock hole 42A is formed in a substantially central portion of the rail 42 in the front-rear direction. The locking hole 42A faces the first hole 41A in the normal state shown in FIG. 6 (a) and faces the second hole 41B in the first cushion retracted state shown in FIG. 6 (b). In the second cushion retracted state shown in the above, the third hole 41C is opposed to the third hole 41C.

The lock mechanism 50 sets the position of the seat cushion S1 with respect to the seat back S2, in other words, the position of the seat cushion S1 with respect to the arm 10, to the first position shown in FIG. 6A and the third position shown in FIG. 6B. And, it is a mechanism for locking to the second position shown in FIG. 6 (c). Here, the first position is a position corresponding to a normal state. Further, the second position is a position behind the first position and corresponds to the second cushion retracted state. The third position is a position between the first position and the second position, and is a position corresponding to the first cushion retracted state.

The lock mechanism 50 includes a lock pin 51 and a compression coil spring 52 which is a urging member. The lock pin 51 is located at an engagement position where the lock hole 42A of the rail 42 is engaged with the hole formed in the slider 41 (for example, the first hole 41A) and a retracted position away from the hole formed in the slider 41. It is movable. The compression coil spring 52 urges the lock pin 51 from the retracted position to the engaged position. The compression coil spring 52 is provided between the lock pin 51 and the seat cushion frame.

Further, the lock pin 51 is connected to the lock release lever L2 via the wire W. The lock release lever L2 is rotatably provided on the front side of the lower surface of the seat cushion S1. The lock release lever L2 is rotatable between the initial position shown by the solid line in FIG. 6A and the release position shown by the alternate long and short dash line in FIG. 6B. The lock release lever L2 is always urged to the initial position by a spring (not shown).

As a result, when the occupant pulls the lock release lever L2, the lock pin 51 moves from the engaged position to the retracted position against the urging force of the compression coil spring 52. Further, when the occupant releases the lock release lever L2, the lock pin 51 moves from the retracted position to the engaged position by the urging force of the compression coil spring 52.

As shown in FIG. 6C, when the seat cushion S1 is located at the second position, that is, when the seat cushion S1 is arranged most rearward, the seat cushion S1 protrudes forward from the seat back S2. The quantity LF is larger than the rearward protrusion amount LR. Here, the forward protrusion amount LF means the distance from the intersection of the virtual line LA along the front surface of the seat back S2 and the upper surface of the seat cushion S1 to the front end of the seat cushion S1. Further, the rearward protrusion amount LR means the distance from the intersection of the virtual line LB along the rear surface of the seat back S2 and the upper surface of the seat cushion S1 to the rear end of the seat cushion S1.

Next, an operation method of the vehicle seat S according to the present embodiment will be described.
In the normal state shown in FIG. 1, the rotation of the seat back S2 is restricted by the lock of the reclining mechanism 2, so that the seat back S2, the arm 10, the support member 20 and the base member 30 have a three-node link with 0 degrees of freedom. Therefore, the postures of the seat back S2, the arm 10, and the support member 20 are fixed. Further, since the seat cushion S1 is supported by the arm 10 whose posture is fixed via the slide mechanism 40, the seat cushion S1 is maintained in a horizontal posture.

When switching from the normal state to the first cushion retracted state, the occupant first pulls the lock release lever L2 to release the lock by the lock mechanism 50. As a result, the lock pin 51 is disengaged from the first hole 41A (see FIG. 6A) of the slide mechanism 40, so that the seat cushion S1 can slide backward when the vehicle seat S is in the normal state. .. Specifically, in the normal state, the seat cushion S1 is configured to be slidable rearward with respect to the seat back S2, the arm 10, the support member 20 and the base member 30.

As shown in FIG. 2, when the occupant moves the seat cushion S1 from the normal state by the first distance D1, as shown in FIG. 6B, the lock pin 51 on the seat cushion S1 side becomes the second lock pin 51 on the arm 10 side. Facing the hole 41B. At this time, when the occupant releases the lock release lever L2, the lock pin 51 engages with the second hole 41B due to the urging force of the compression coil spring 52, so that the seat cushion S1 is locked to the third position. .. As a result, the vehicle seat S can be satisfactorily maintained in the first cushion retracted state.

When switching from the first cushion retracted state to the second cushion retracted state, the occupant unlocks the lock mechanism 50 and moves the seat cushion S1 to the second distance D2 as shown in FIG. Just slide it backwards. As a result, as shown in FIG. 6C, the lock pin 51 on the seat cushion S1 side faces the third hole 41C on the arm 10 side, and the seat cushion S1 is locked by the lock mechanism 50 at this position. , The seat cushion S1 is locked to the second position. As a result, the vehicle seat S can be satisfactorily maintained in the second cushion retracted state.

The switching from the second cushion retracted state to the first cushion retracted state and the switching from the first cushion retracted state to the normal state may be performed in the reverse of the above-described operation.

As shown in FIG. 1, when switching from the normal state to the dive-down state, first, the occupant operates the reclining release lever L1 to release the lock by the reclining mechanism 2. As a result, the seat back S2, the arm 10, the support member 20, and the base member 30 become a four-node link having one degree of freedom. Therefore, when the seat back S2 is tilted forward, the seat back S2 rotates. The support member 20 gradually falls forward.

When the occupant further tilts the seat back S2 while the support member 20 is tilted forward to some extent, the seat cushion S1 is pushed forward via the arm 10. As a result, the support member 20 is pulled by the seat cushion S1 pushed forward, so that the end portion of the connecting member 21 slides forward in the support hole 31.

Then, as shown in FIG. 4, when the end portion of the connecting member 21 abuts on the front end of the support hole 31, the seat back S2 is in a dive-down state folded on the seat cushion S1. In the dive-down state, the reclining mechanism 2 may be in a locked state or an unlocked state. However, when the reclining mechanism 2 is unlocked in the dive-down state, it is not necessary to operate the reclining release lever L1 when switching from the dive-down state to the normal state. ..

As described above, when switching from the normal state to the dive-down state, the seat cushion S1 moves forward, so that the arm 10 rotates clockwise around the second axis A2. Therefore, the distance from the first axis A1 to the third axis A3 is larger in the dive-down state than in the normal state or the cushion retracted state.

Specifically, the positions of the axes A1 to A4 in the dive-down state are as follows. The first axis A1 is arranged in front of and below the second axis A2, and in front of and above the fourth axis A4. The second axis A2 is arranged in front of and above the third axis A3, and in front of and above the fourth axis A4. The fourth axis A4 is arranged at a position forward and lower than the third axis A3. The distance from the third axis A3 to the fourth axis A4 is larger in the dive-down state than in the normal state or the cushion retracted state.

When switching from the dive-down state to the normal state, when the occupant raises the seat back S2 backward, the seat cushion S1 is pulled backward via the arm 10. As a result, the support member 20 is pushed backward by the seat cushion S1 pulled backward, so that the end portion of the connecting member 21 slides backward in the support hole 31.

After that, as shown in FIG. 1, when the end portion of the connecting member 21 comes into contact with the rear end of the support hole 31, the support member 20 rotates upward about the fourth axis A4. Then, when the seat back S2 is rotated to a lockable position by the reclining mechanism 2 and the reclining mechanism 2 is locked at that position, the vehicle seat S is in the normal state.

In the vehicle seat of the present embodiment as described above, the following effects can be obtained.
By simply sliding the seat cushion S1 rearward from the normal state, the space in front of the vehicle seat S can be expanded. Therefore, even a weak user can easily switch the state of the vehicle seat S from the normal state to the cushion retracted state in which the space in front can be effectively utilized.

Since the seat cushion S1 is supported by the arm 10 provided on the seat back S2, the vertical position of the seat cushion S1 can be freely set by simply changing the shape of the arm 10 to an L shape as in the above embodiment. The seat cushion S1 can be slid and moved satisfactorily without interfering with the seat back S2.

Since the position of the seat cushion S1 is locked to the first position and the second position by the lock mechanism 50, the vehicle seat S can be well held in the normal state and the cushion retracted state.

Since the seat cushion S1 can be locked at the first position, the second position, and the third position by the lock mechanism 50, for example, an object is placed between the front end portion of the seat cushion S1 and the back surface of the vehicle seat in front of the seat cushion S1. When you want to pinch, you can increase the types of things to pinch.

When the seat cushion S1 is located at the second position, the forward protrusion amount LF of the seat cushion S1 from the seat back S2 is made larger than the rear protrusion amount LR, so that the space behind the seat back S2 is increased. It is possible to secure the space in front while suppressing the reduction.

Since the arm 10 can be rotated with respect to the seat back S2 when switching to the dive-down state, it is possible to satisfactorily switch to the dive-down state.

Since the second portion 12 is located in front of and below the connecting portion of the first portion 11 with the seat back S2 in the normal state, it is possible to satisfactorily switch to the dive-down state.

Since the seat cushion S1 can slide backward with respect to the support member 20 in the normal state, for example, the seat cushion S1 is compared with a structure in which the support member is provided on the seat cushion and the support member moves together with the seat cushion. Can be smoothly moved to the rear.

Since the seat cushion S1 is in a horizontal posture in the first cushion retracted state shown in FIG. 2 and the second cushion retracted state shown in FIG. 3, luggage can be placed on the seat cushion S1. Further, in the first cushion retracted state and the second cushion retracted state, the length of the seat surface of the seat cushion S1 in the front-rear direction can be made smaller than in the normal state, so that the seat surface is most suitable for a child to sit on, for example. Can be length.

Although the embodiment of the present invention has been described above, the present invention can be appropriately modified and carried out as shown in the following other embodiments.

In the above embodiment, the forward protrusion amount LF of the seat cushion S1 from the seat back S2 when the seat cushion S1 is located at the second position is made larger than the backward protrusion amount LR, but the present invention has the present invention. Not limited to this, the forward protrusion amount LF may be greater than or equal to the backward protrusion amount LR. That is, the forward protrusion amount LF and the backward protrusion amount LR may be the same.

In the above embodiment, the seat cushion S1 is configured to be locked at three positions in the front-rear direction, but the present invention is not limited to this, and the seat cushion may be locked at four or more positions. That is, as the locking mechanism, a mechanism that can be locked at two or more positions set between the first position, the second position, and the first position and the second position may be adopted. Further, the lock mechanism may be configured to lock the seat cushion S1 only at the first position and the second position.

In the above embodiment, the seat cushion S1 is slidably supported by the arm 10, but the present invention is not limited to this, and for example, the seat cushion may be slidably supported by the seat back frame.

In the above embodiment, the arm 10 is formed in an L shape, but the present invention is not limited to this, and the shape of the arm is arbitrary.

In the above embodiment, the support member 20 is provided on the seat cushion S1, but the present invention is not limited to this, and the support member may not be provided. That is, the seat cushion may be configured to be supported only by the arm. In this case, for example, a member that regulates the rotation of the arm with respect to the seat back may be provided.

In the above-described embodiment, the slide movement direction of the end portion of the connecting member 21 is a direction inclined with respect to the front-rear direction, specifically, a direction toward a front diagonally downward direction, but the present invention is not limited to this, and the slide movement direction is not limited to this. May be, for example, a direction along the front-rear direction or a direction diagonally forward and upward.

In the above embodiment, the first axis A1 is arranged in front of and below the second axis A2, but the present invention is not limited to this, for example, the first axis is in front of the second axis. Moreover, the position in the vertical direction may be the same as that of the second axis.

In the above embodiment, the reclining mechanism 2 is a regulating member that regulates the rotation of the support member 20 with respect to the base member 30 so that the upper end portion of the support member 20 approaches the third axis A3 in a normal state. However, the present invention is not limited thereto. For example, the restricting member may be a mechanism for locking or unlocking the rotation of the arm with respect to the seat back, a mechanism for locking or unlocking the rotation of the support member with respect to the arm, or a support for the base member. It may be a mechanism for locking or releasing the rotation of the member. Further, the regulating member may be a mechanism for locking or unlocking the seat back with respect to the frame of the vehicle (for example, a structure in which a latch mechanism provided on the seat back is engaged with a striker provided on the frame) or the like.

The positions of the axes A1 to A4 in each state of the vehicle seat S are not limited to the above-described embodiment, and may be appropriately changed.

In the above embodiment, the vehicle seat S used in an automobile is exemplified as the vehicle seat, but the present invention is not limited to this, and other vehicle seats such as other vehicles such as ships and aircraft can be used. It can also be applied to the sheet used.

Further, each element described in the above-described embodiment and modification may be arbitrarily combined and carried out.

F Floor S Vehicle Seat S1 Seat Cushion S2 Seat Back 40 Slide Mechanism

Claims (8)

The state of the seat cushion and the seat back is the normal state when the occupant sits, the seat cushion is arranged closer to the floor than the normal state, and the seat back is folded on the seat cushion. It is a vehicle seat that can be switched to the dive down state,
A vehicle seat characterized in that, in the normal state, the seat cushion slides backward with respect to the seat back so as to be able to protrude rearward from the seat back . An arm that movably supports the seat cushion and is rotatably provided on the seat back .
A base member fixed to the floor and rotatably supporting the seat back.
A support member that supports the arm and includes a support member that is rotatably connected to the arm and the base member .
The vehicle seat according to claim 1 , wherein the base member has a hole that movably supports the connecting portion between the support member and the base member in the front-rear direction . A base member fixed to the floor and provided with a base member that supports the seat back.
The front end of the seat cushion
In the normal state, it is arranged in front of the front end of the base member.
The vehicle seat according to claim 1 or 2, wherein when the seat cushion is slid backward from the normal state, the seat cushion can be moved behind the front end of the base member. The arm provided on the seat back and
The one according to any one of claims 1 to 3, wherein the slide mechanism supports the seat cushion so as to be slidable in the front-rear direction, and includes a slide mechanism provided on the arm. Vehicle seat. The vehicle seat according to claim 4, wherein the slide mechanism is fixed to the inside in the left-right direction of the arm. The slide mechanism is
With a slider,
With a rail that supports the slider so that it can be slidably moved,
The vehicle seat according to claim 4 or 5, wherein the slider and the rail are arranged in the left-right direction on the side portion of the seat cushion. A lock mechanism for locking the position of the seat cushion with respect to the seat back to a first position corresponding to the normal state and a second position behind the first position is provided.
Claims 1 to 6 are characterized in that, when the seat cushion is located at the second position, the amount of the seat cushion protruding forward from the seat back is equal to or greater than the amount of protrusion backward. The vehicle seat according to any one of the above. The vehicle seat according to claim 2 , wherein the seat cushion is configured to be slidable rearward with respect to the support member in the normal state.

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