JPH10297332A - Seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To move a seat cushion, a seat back, and a head rest, to a storing position, by a simple operation. SOLUTION: The seat 10 furnishes a seat cushion 11 which can be sprung up to the front side by making a hinge 20 provided at the front part as the center; a seat back 12 supported rotatable in the longitudinal direction through a reclining mechanism 60; and a head rest 13. The seat back 12 is moved in the forward falling direction, by releasing the locking of the reclining mechanism 60 by the first interlocking mechanism interlocked to the springing-up operation of the seat cushion 11, when the seat cushion 11 is sprung up. By the second interlocking mechanism interlocked to the forward falling of the seat back 12, the locking condition of the head rest 13 is released, and the head rest 13 is made fall to the storing position by a spring for head rest.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a foldable seat applied to a vehicle such as an automobile.

[0002]

2. Description of the Related Art In a vehicle having a luggage compartment at a rear portion of a vehicle body, a foldable rear seat is sometimes used to expand the luggage compartment as necessary. For example, the front portion of the seat cushion is supported by the hinge portion on the floor of the vehicle body so as to be able to jump up, and the seat back portion is supported by the reclining mechanism provided on the floor portion of the vehicle body so as to be able to fall forward. When the luggage compartment needs to be expanded, the seat cushion is flipped forward, and then the seat back is tilted forward. By doing so, the rear surface of the seat back that has been tilted forward becomes substantially a part of the floor of the luggage compartment.

In a seat having a headrest provided above a seatback, if the above-described folding structure is adopted, the headrest may interfere with a seat cushion when the seatback falls forward. For this reason, a seat has been proposed in which the headrest can be turned to the storage position.

[0004]

However, in the seat having the foldable headrest as described above, the operation of folding the headrest to the storage position, the operation of flipping up the seat cushion, and the operation of tilting the seatback forward. Has to be performed separately, and there is a problem that it takes time when folding.

[0005] Further, as shown in Japanese Utility Model Laid-Open Publication No. 2-44530, when the headrest is tilted forward by hand,
There has been proposed a device in which the lock of the reclining mechanism is released, but also in this case, it is necessary to perform a flip-up operation of the seat cushion in addition to the operation of tilting the headrest forward, which is difficult in operability.

Accordingly, it is an object of the present invention to provide a seat capable of moving a seat cushion, a seat back and a headrest to a storage position by a simple operation.

[0007]

A vehicle seat according to the present invention for achieving the above object is as described in claim 1, and when a seat cushion is flipped up, it interlocks with this flipping-up operation. The seat back moves in the forward falling direction by the spring, and the headrest falls to the storage position in conjunction with the above-mentioned forward falling operation of the seat back.

According to the second aspect of the present invention, when the seat cushion is flipped up, the first interlocking member is pulled in conjunction with the seat cushion flipping action,
When the release lever of the seat back hinge moves in the unlocking direction, the seat back moves in the forward falling direction by the elastic force of the spring. When the second interlocking member is pulled in conjunction with the forward tilting operation of the seat back, the lock of the locking means of the headrest is released, and the headrest falls to the storage position by the headrest spring.

According to the third aspect of the present invention, when the lock member of the headrest is operated in the unlocking direction by the second interlocking member, the lock member comes off the receiving portion, so that the headrest spring is used. The headrest falls to the stowed position.

In the invention described in claim 4, the first wire having the inner wire functioning as the first interlocking member is provided.
With the operation cable of (1), the flip-up operation of the seat cushion is transmitted to the release lever of the seat back hinge portion.

According to the fifth aspect of the present invention, the forward tilting operation of the seat back is transmitted to the lock member of the headrest by the second operation cable having the inner wire functioning as the second interlocking member.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 includes a seat cushion 11, a seat back 12 provided at the rear of the seat cushion 11, and a headrest 13 provided at an upper end of the seat back 12. It has. Seat cushion 1
1 is provided on a floor panel constituting a floor portion 15 of the vehicle body. A luggage compartment 16 is located behind the seat back 12.

A front portion of the seat cushion 11 is rotatably supported by a hinge portion 20 provided on the floor portion 15. The seat cushion 11 is lifted in a direction in which the rear end of the seat cushion 11 is turned upside down. Can be flipped around the hinge portion 20 to the front of the vehicle body until it becomes an inverted state.

The details of the hinge portion 20 are shown in FIGS. The hinge portion 20 is rotatable in the front-rear direction by a hinge base 22 fixed to the floor portion 15 (see FIG. 1) of the vehicle body by a bolt 21 and a horizontal hinge shaft 23 below the hinge base 22. And a hinge bracket 24 provided. Hinge bracket 24
Is fixed to a frame 11a of the seat cushion 11 (only a part is shown in FIG. 3).

A rotating lever 31 is provided on the hinge base 22 so as to be rotatable in the front-rear direction by a lever shaft 30. The lever shaft 30 is also provided with a linking member 32 capable of reciprocatingly rotating in a vertical direction. Have been. A pull link 36 is rotatably attached to a lower portion of the hinge bracket 24 by a link shaft 35. An operating pin 37 as an operating member extending in the horizontal direction is provided above the pull link 36.

On both sides of the hinge base 22, a pair of left and right side walls 40 facing each other are provided. This side wall 4
A guide groove 41 extending in the up-down direction is formed at 0. The operating pin 37 is inserted into the guide groove 41,
The operating pin 37 can move in the longitudinal direction (up and down direction) of the guide groove 41.

The link member 32 is urged in a counterclockwise direction in FIG. 3 by a return spring 45 so that the bottom wall 46 of the link member 32 abuts on the front side of the rotary lever 31. . A protruding operating portion 47 is provided at a front portion of the linking member 32. This operating part 47 is
When the operating pin 37 moves from above along the guide groove 41, the operating pin 37 projects to a position where it can strike from above.

As a result, when the operating pin 37 is lowered toward the operating portion 47, the operating portion 47 is pushed down by the operating pin 37, and as shown in FIG.
And the rotation lever 31 are integrally rotated about the lever shaft 30 in the counterclockwise direction. Then, when the operating pin 37 moves further downward, as shown in FIG.
7 comes off the operating pin 37.

As shown in FIG. 7, when the operating pin 37 comes into contact with the operating section 47 from below, the linking member 32 flexes the return spring 45 with the raising of the operating pin 37 while flexing the return spring 45. Independently from the return spring 4 when the operating pin 37 passes over the operating portion 47.
With the elasticity of 5, the linking member 32 returns to the original position, and the bottom wall 46 comes into contact with the rotating lever 31 as shown in FIG.

The hinge base 22 and the rotating lever 31
One end of an operation cable 50 functioning as an interlocking member is connected. The operation cable 50 is the outer tube 5
One end 51a of the outer tube 51 is fixed to the cable connecting portion 53 of the hinge base 22, and one end 52a of the inner wire 52 is connected to the cable connecting portion 5 of the rotating lever 31.
4 is connected. Therefore, when the rotating lever 31 rotates counterclockwise in FIG. 3, the inner wire 52 moves in a direction to be pulled out from the outer tube 51.

As shown in FIG. 8, the other end of the operation cable 50 is located near a reclining mechanism 60 as an example of a seat back hinge. The reclining mechanism 60 includes a reclining base 61 fixed to the floor portion 15 of the vehicle body, a movable bracket 63 rotatable in the front-rear direction around a reclining shaft 62 provided on the reclining base 61, and a movable member relative to the reclining base 61. Locking means (not shown) using a latch mechanism or the like capable of locking the bracket 63 at a desired inclination angle, a reclining release lever 64 capable of driving the locking means in the unlocking direction, and a reclining base 61 A reclining spring 65 such as a spiral spring for urging the movable bracket 63 in the forward falling direction, and a return spring 66 for returning the reclining release lever 64 to the locked position are provided. The movable bracket 63 is the seat back 1
2 frame 12a.

Therefore, in the reclining mechanism 60, when the reclining release lever 64 is operated in the unlocking direction, the locking means is switched to the unlocked state. At this time, the seat back 12 can fall forward integrally with the movable bracket 63 by the elastic force of the spring 65.

The other end 51b of the outer tube 51 of the first operation cable 50 is fixed to the reclining base 61. The other end 52 b of the inner wire 52 is connected to a reclining release lever 64. Therefore, when the other end 52b of the inner wire 52 moves in the direction of being drawn into the outer tube 51, the reclining release lever 64 rotates in the lock releasing direction.

The operation cable 50, the lever 31, the linking member 32, the pull link 36, etc. of the hinge 20 are
A first interlocking mechanism that interlocks with the flip-up operation of the seat cushion 11 is configured.

On the other hand, the headrest 13 is configured as shown in FIGS. That is, the headrest 13 includes a fixed frame 71 having a pair of left and right stays 70, and a movable frame 72 rotatably provided in the front-rear direction with respect to the fixed frame 71.

The movable frame 72 includes a pair of left and right bases 75 formed by pressing a sheet metal or the like, and a gate-shaped head frame 76 having both ends welded to each base 75. The pad material 77 is on the outside of the head frame 76.
(Shown in FIG. 10).

The base portion 75 has a hole 81 through which a support shaft 80 is inserted.
A long hole 82 is formed along an arc centered on the hole 81. A locking hole 86 is formed in the front wall 85 of the base 75. An insertion hole 88 is formed in the lower wall 87 of the base 75, and the upper end of the stay 70 is inserted from below the insertion hole 88.

The stay 70 is removably inserted into the upper end portion of the frame 12a (only a part is shown in FIG. 8) of the seat back 12. A stay bracket 90 is provided at an upper end of the stay 70. A horizontal support shaft 80 is provided on the stay bracket 90, and by inserting the support shaft 80 into the hole 81 of the base 75 of the movable frame 72, the movable frame 72 is rotatably supported in the front-rear direction. Have been. Rod insertion hole 9 in stay bracket 90
2 and a cable connection portion 93 are provided.

A connecting rod 100 extending horizontally across a pair of left and right bases 75 is provided. Both ends of the connecting rod 100 are inserted into the long holes 82 of the base 75, respectively. A lock member 101 and a spring 102 are provided at both ends of the connecting rod 100, respectively.
A hook-shaped engaging portion 103 is provided on one end side of the lock member 101. A cable connection portion 104 is provided on the other end of the lock member 101. The pair of left and right lock members 101 can rotate in an interlocking relationship with each other via the connecting rod 100.

The hook-shaped locking portion 103 has a shape capable of engaging with the receiving portion 86a on the lower edge side of the locking hole 86 of the movable frame 72. When the lock member 101 rotates in a direction in which the locking portion 103 descends in a state of protruding forward, the locking portion 103 engages with the receiving portion 86a. The lock member 101 is urged downward by a spring 102, that is, in a direction to engage with the receiving portion 86a. The lock member 101, the receiving portion 86a, the spring 102, and the like constitute a locking means for the headrest 13.

The movable frame 72 is urged by a headrest spring 110 using a tension spring in a direction of falling forward, that is, in a direction of a storage position. The upper end 111 of the tension spring 110 is locked by a spring locking portion 112 of the connecting rod 100. The lower end 113 of the spring 110 is locked by a spring locking portion 114 of the base 75 in a state where tension is applied to the spring 110.

When the movable frame 72 is in the use position as shown in FIG. 10 and the locking portion 103 is in the locked state in which it is engaged with the receiving portion 86a, the movable frame 72 is moved by the elastic force of the spring 110. In FIG. 10, counterclockwise,
That is, it is urged to rotate in the direction of the storage position shown in FIG.

A second operation cable 120 functioning as a second interlocking member is routed between the headrest 13 and the reclining mechanism 60. This operation cable 120 also has an inner wire 122 movably inserted inside the outer tube 121, and one end 121a of the outer tube 121 is fixed to the cable connection portion 93 of the stay bracket 90 as shown in FIG.
One end 122a of the inner wire 122 is
Is connected to the cable connection part 104 of Therefore, when the one end 122a of the inner wire 122 moves in the direction of being pulled into the outer tube 121, the lock member 101
At a clockwise direction.

The other end of the second operation cable 120 is guided to the position of the reclining mechanism 60 shown in FIG. And the movable bracket 6 of the reclining mechanism 60
3, the other end 121b of the outer tube 121 is fixed,
The other end 122b of the inner wire 122 is connected to the reclining base 61. Therefore, the movable bracket 63
Is rotated forward with respect to the reclining base 61, the other end 122b of the inner wire 122 relatively moves in a direction to be pulled out from the outer tube 121.

Accordingly, the operation cable 120 constitutes a second interlocking mechanism for releasing the locked state of the lock member 101 in conjunction with the forward tilting operation of the seat back 12. Next, the operation of the seat 10 having the above configuration will be described. FIG. 1A shows a normal seat use state. In this use state, the seat cushion 11 is substantially horizontal so that the occupant can sit down, and the seat back 1
2 is almost upright. At this time, in the hinge portion 20, the operation pin 37 is located above the operation portion 47 of the link member 32 as shown in FIG.

As shown in FIG. 1 (B), when the seat cushion 11 is flipped forward by hand around the hinge portion 20, the position of the pull link 36 is increased as the hinge bracket 24 is raised as shown in FIG. Gradually descends,
Accordingly, the position of the operating pin 37 is also lowered.

When the seat cushion 11 is turned up to a certain angle, the operating pin 37 is moved to the operating portion 4.
7 is contacted from above. As shown in FIG. 5, the operating pin 37 continues to descend.
The actuating portion 47 is pivoted down by the actuation member 47 so that the link member 32
, The rotating lever 31 rotates counterclockwise about the lever shaft 30 and one end 52a of the inner wire 52 of the first operation cable 50 is pulled in the direction indicated by the arrow P in FIG. When the inner wire 52 is sufficiently pulled, the reclining release lever 64 of the reclining mechanism 60 is operated in the lock releasing direction. For this reason, the seat back 12 is caused by the repulsive load of the spring 65 as shown in FIG.
As shown in FIG.

While the seat back 12 is pivoting forward, the inner wire 122 of the second operation cable 120 is pulled so that the headrest 1
The third lock member 101 rotates in the unlocking direction, whereby the locking portion 103 is disengaged from the receiving portion 86a, and the movable frame 72 falls down to the front, that is, the storage position shown in FIG. Thus, the seat 10 is folded as shown in FIG.
The luggage compartment 16 can be expanded.

In order to return the seat 10 from the folded state shown in FIG. 1 (D) to the seat use state shown in FIG. 1 (A), the seat back 12 is raised to a standing position by hand, and then the seat cushion 11 is moved by hand. Return to horizontal position. After that, when the headrest 13 is returned to the original use position by hand, the lock member 10
The first locking portion 103 can be returned to the original locked state by being hooked on the receiving portion 86a.

As described above, when the seat cushion 11 is returned to a horizontal state after the seat back 12 is erected, the operating pin 37 comes into contact with the operating portion 47 from below as shown in FIG. The operation pin 37 and the operation part 47 rotate upward about the lever shaft 30 integrally with the linking member 32. In this case, since the linking member 32 is turned up independently of the turning lever 31, the turning lever 31 is prevented from moving in the direction of pulling the inner wire 52 of the operation cable 50, and the reclining mechanism 60 is in the locked state. Can be maintained.

[0041]

According to the first aspect of the present invention, the simple operation of simply flipping up the seat cushion allows the seat back to fall forward and move the headrest to the storage position continuously. It can be carried out. Claim 2
According to the invention described in (1), the seat back and the headrest can be reliably linked to the storage position by the first linking mechanism and the second linking mechanism. According to the third aspect of the present invention, the headrest locking means can realize the holding of the headrest in the use state and the movement of the headrest to the storage position when the lock is released with a simple configuration.

According to the fourth and fifth aspects of the present invention, since the cable is used as the interlocking member constituting the interlocking mechanism, the distance from the hinge at the front of the seat cushion to the seat back hinge at the rear of the seat cushion is increased. When,
The interlocking member can be easily arranged along the frame of the seat between the seat cushion and the headrest.

[Brief description of the drawings]

FIG. 1 is a side view showing an operation mode of a vehicle seat according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a hinge portion of the seat shown in FIG.

FIG. 3 is a sectional view of a hinge portion of the seat.

FIG. 4 is a cross-sectional view showing a state where the bracket of the hinge part is slightly rotated up;

FIG. 5 is a cross-sectional view showing a state where a lever of the hinge part is rotated.

FIG. 6 is a cross-sectional view of a state in which a bracket of the hinge part is erected.

FIG. 7 is a cross-sectional view showing a state where the bracket of the hinge part is being rotated and lowered.

FIG. 8 is a perspective view of a seat back hinge portion of the seat.

FIG. 9 is an exploded perspective view of a headrest in the seat.

FIG. 10 is a cross-sectional view when the headrest shown in FIG. 9 is at a use position.

FIG. 11 is a cross-sectional view when the headrest shown in FIG. 9 is at a storage position.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Seat 11 ... Seat cushion 12 ... Seat back 13 ... Headrest 20 ... Hinge part 50 ... 1st operation cable (1st interlocking member) 60 ... Reclining mechanism (seat back hinge part) 65 ... Spring 101 ... Lock member 110 … Head rest spring 120… Second operation cable (second interlocking member)

Claims (5)

[Claims] 1. A seat cushion which can be flipped up about a front portion, a seat back which is urged in a forward falling direction by a spring and falls forward in conjunction with a flip up operation of the seat cushion; And a headrest provided at an upper portion and falling to a storage position in conjunction with a forward leaning operation of the seat back. 2. A seat cushion provided at a front portion thereof, which can be flipped up about a horizontal axis, and supported by a spring at the rear of the seat cushion via a seat back hinge portion so as to be pivotable in the front-rear direction. A seat back urged in a forward falling direction, and provided at an upper portion of the seat back so as to be rotatable around a horizontal support shaft, and can be held at a use position by a lock means, and at a storage position by a headrest spring. A headrest that is urged toward the front, and a first interlocking member that is pulled in conjunction with the flip-up operation of the seat cushion, and locks the seatback hinge when the first interlocking member is pulled. A first interlocking mechanism for causing the seat back to fall forward by the spring by driving in the release direction; and interlocking with the forward falling operation of the seat back. Second drawn
The headrest spring is used to move the headrest from the use position to the storage position by driving the headrest locking means in the unlocking direction when the second interlocking member is pulled. 2. The vehicle seat according to claim 1, further comprising: a second interlocking mechanism for tilting the vehicle. 3. The headrest locking means is provided on a fixed side frame of the headrest so as to be rotatable around a horizontal axis and when the headrest is in the use position, a receiving portion of the movable side frame of the headrest. The vehicle seat according to claim 2, further comprising: a lock member that engages with the lock member; and a spring that biases the lock member in a direction in which the lock member engages with the receiving portion. 4. The first operation member is a first operation cable including an outer tube and an inner wire, and one end of the inner wire is connected to a lever that moves in accordance with a flip-up operation of the seat cushion. 3. The vehicle seat according to claim 2, wherein the other end of the inner wire is connected to a release lever of the seat back hinge. 5. The second operation cable according to claim 2, wherein the second interlocking member is a second operation cable including an outer tube and an inner wire, one end of the inner wire is connected to the lock member of the headrest, and the other end of the inner wire is connected to the other end of the inner wire. 4. The vehicle seat according to claim 3, wherein the inner wire is connected to a portion that relatively moves in a direction of pulling one end of the inner wire when the seat back falls down.