JPH11208329A - Automotive rear seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suit the seated environment of the automotive rear seat to an occupant and make it comfortable. SOLUTION: The automotive rear seat is divided into plural adjoining seats A, and the respective seats A are equipped with height adjusting devices 1 to adjust height of seat parts 25 independently with each other. The devices 1 have a right and left pair of parallel link mechanisms, and these parallel link mechanisms are arranged between base frames 10 and seat part frames 20 forming the skeletons of the seat parts 25. The turning of one leg member of these parallel link mechanisms is prohibited by the locking mechanisms to lock the parallel link mechanisms, and this mechanism is operated by an operation mechanism provided on the frame 20, thereby releasing this locking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a rear seat of an automobile.

[0002]

2. Description of the Related Art Conventionally, a rear seat of an automobile has one long seat (bench type seat). Also,
There has also been developed one that includes a plurality of divided seats (separate type seats) so that the inclination of the seat of each seat can be adjusted.

[0003]

However, in the above-mentioned conventional rear seat, since the height of the seat portion is constant, the space inside the vehicle is narrow for an occupant with a high seat height, and the door is not for an occupant with a low seat height. The view from the window was bad.

[0004]

According to a first aspect of the present invention, in a rear seat of an automobile, a plurality of divided seats are arranged adjacent to each other, and each seat is provided with a height adjusting device to reduce the height of a seat portion. It is characterized by being adjustable. According to a second aspect of the present invention, there is provided a vehicle rear seat according to the first aspect. Each seat is
Including a base frame and a seat frame that is located above the base frame and constitutes a skeleton of the seat, the height adjustment device includes:
A pair of left and right leg members is provided, and both end portions of these leg members are rotatably connected to the base frame and the seat frame to form a pair of left and right parallel link mechanisms. The adjusting device includes a lock mechanism that inhibits rotation of the leg member of one of the parallel link mechanisms and locks the rotation, and an operating mechanism that is provided on the seat frame and unlocks the lock mechanism. I do.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle rear seat according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 5, the rear seat is divided into a plurality of (for example, two) seats A, and the heights of the respective seats A can be adjusted independently of each other. That is, each seat A includes the base frame 10 and the seat frame 2.
0 and a height adjusting device 1. The left and right seats A are adjacent to each other because a console box is not interposed unlike the front seats.

[0006] As shown in FIG.
Reference numeral 0 denotes a pair of long frame members 11 and 12 extending in the front-rear direction (the left-right direction in FIG. 1) and facing in the left-right direction (the direction perpendicular to the plane of FIG. , 14.

[0007] As shown in FIG.
Has a long frame member 21 extending in the front-rear direction, and a U-shaped pipe 22 fixed to the frame member 21. This pipe 22 is a portion 22a extending forward and backward.
And portions 22b and 22c extending from the front and rear ends thereof and fixed to the frame member 21. Seat frame 2
At 0, a cushion 25 is attached, and both of them constitute a seat. Further, the seat frame 20
A pair of brackets 28 (only one is shown) are fixed to the left and right sides of the rear end, and a backrest 29 is rotatably attached to the upper ends of these brackets 28.

Next, the height adjusting device 1 will be described in detail. As shown in FIG. 1, the height adjustment device 1 includes a support mechanism 30 that supports the seat frame 20 so as to be vertically movable, a lock mechanism 60 that locks the support mechanism 30, and an unlocking operation of the lock mechanism 60. An operating mechanism 80 for performing the operation and other components are provided.

The support mechanism 30 is disposed between the base frame 10 and the seat frame 20, and includes one arm 31 (leg member) and three links 32 (leg members). I have. The lower end of the arm 31 is rotatably connected to a front portion of the frame member 11 of the base frame 10 via a shaft 33. The upper end of the arm 31 is rotatably connected to a front portion of the frame member 21 of the seat frame 20 via a bracket 39 and a shaft 34. Similarly, both ends of the link 32 are pivotally connected to the rear portions of the frame members 11 and 21 via shafts 35 and 36. The frame members 11, 21, the arm 31, and the link 32 constitute a parallel link mechanism (a parallel link mechanism on the left side of the seat). Similarly, the other two links, the frame member 12 of the base frame 10 and the seat frame 20
And a portion 22a of the pipe 22 constitutes a parallel link mechanism (a parallel link mechanism on the right side of the seat).

Further, the base frame 10 is provided with a pair of left and right auxiliary parallel link mechanisms 40. Each auxiliary parallel link mechanism 40 includes small links 41 and 42 having one end fixed to the pipes 13 and 14, and small links 4 and 42.
And a rod 43 whose both ends are rotatably connected to the other ends of the first and second ends. The upper ends of the small links 41 of the pair of auxiliary parallel link mechanisms 40 are connected by a pipe 44, and the upper ends of the small links 42 are similarly connected by a pipe 45.

The seat frame 20 is biased upward by biasing means. One of the urging means
One is a spiral spring 50 arranged so as to surround the shaft 33 as shown in FIG. 3 (omitted in FIG. 1 for simplification of the drawing). One end 50 of this spiral spring 50
a is fixed to the shaft 33, and the other end 50 b is hooked on a claw 51 attached to the lower end of the arm 31. Due to the elasticity of the spiral spring 50, the arm 31 is rotationally biased in the clockwise direction, and thus the seat frame 20 is biased upward.

Another urging means is an air cylinder 55
(Indicated only by the dashed line in FIG. 1). One end of the air cylinder 55 is connected to the frame member 11, and the other end is connected to the pipe 45 of the auxiliary parallel link mechanism 40. Due to the elasticity of the air cylinder 55, the small link 4
2 in the clockwise direction, and the auxiliary parallel link mechanism 4
0, the arm 31 and the link 32 are urged clockwise, and thus the seat frame 20 is urged upward.

The height of the seat frame 20 is adjusted in three or more stages, for example, four stages, and is maintained at the adjusted height. The lock mechanism 60 for maintaining this height will be described in detail with reference to FIG. In FIG. 1, the illustration of the lock mechanism 60 is omitted to simplify the drawing. The lock mechanism 60 includes a support plate 61 and a lock plate 62.
And an operating plate 63 and a coil spring 64 as main components. The support plate 61 is supported by the frame member 11 at an interval by the shaft 33 described above and the shafts 65 and 66 disposed near the shaft 33. The lock plate 62 and the operation plate 63 are arranged between the support plate 61 and the frame member 11.

The upper end of the lock plate 62 has a shaft 6
5, and has, for example, two engagement claws 62a on the side edge on the arm 31 side. On the other hand, a gear 31 a concentric with the shaft 33 is formed at the lower end of the arm 31 on the periphery of the lock plate 62. The engagement of the gear 31a of the arm 31 with the engagement claw 62a of the lock plate 62 inhibits the rotation of the arm 31, and thus the vertical movement of the seat frame 20. Further, by selecting three or more meshing positions of the engaging claw 62a with the gear portion 31a, and in this embodiment, four meshing positions, the arm 31 is moved to the four rotational positions P1, P2,
P3 and P4 are selected, and thus the height of the seat frame 20 is adjusted in four steps.

The operating plate 63 is for rotating the lock plate 62 between a meshing position (locking position) shown in FIG. is there. Working plate 63
A substantially central portion thereof is rotatably supported by the shaft 66. The operating plate 63 is provided with the coil spring 64.
Biased clockwise. One end of the coil spring 64 has a claw 63 a at the lower rear portion of the operation plate 63.
And the other end is hung on the lower edge of the frame member 11.

The operating plate 63 has a cam hole 6 at the front.
3b. A pin 67 fixed to the lower portion of the lock plate 62 is inserted into the cam hole 63b, and the two constitute a cam means. In a state where the operating plate 63 is urged clockwise by the coil spring 64, the lower edge of the cam hole 63b pushes the pin 67 obliquely upward.
Receives the force in the clockwise direction to maintain the meshing position.

The operating plate 63 has a claw 6 on the rear upper side.
3c. A wire 70 (transmission member) to be described later penetrates the claw 63c, and a ball 7 provided at the rear end thereof is provided.
1 (hook portion) is locked. When the wire 70 is pulled forward, the operating plate 63
Rotates counterclockwise against the coil spring 64.
At this time, the pin 67 extends from the front edge to the upper edge of the cam hole 63b of the operation plate 63, and the cam action causes the lock plate 62 to rotate counterclockwise to reach the non-meshing position.

Next, an operation mechanism 80 for pulling the wire 70 to bring the lock plate 62 into the non-meshing position (unlocked state) will be described with reference to FIGS. 1 and 4A.
This will be described with reference to FIG. The operating mechanism 80 is provided at the front of the seat frame 20 and has a casing 81.
And two levers, that is, an operation lever 82 and a cooperation lever 83 as main components.

The casing 81 has a box shape with a lower portion and a front portion opened, and is fixed to a front portion 22 b of the pipe 22 of the seat frame 20 to form a part of the seat frame 20. The operation lever 82 has a substantially triangular shape, and one corner thereof is rotatably supported by a front portion of the casing 81 via a shaft 84. Operation lever 8
An operating portion 82a for hooking a finger for operation protrudes from the other corner of 2, and an engaging portion 82x protrudes from the other corner.

The link lever 83 has a substantially L-shape.
A substantially central portion thereof is rotatably supported by an intermediate portion of the casing 81 via a shaft 85. The other end of the wire 70 is connected to one end of the link lever 83. The other end of the link lever 83 is provided as an engaging portion 83x. In the rotation locus of the operation lever 82 and the cooperation lever 83,
These engaging portions 82x and 83x interfere with each other.

The operating lever 82 includes a torsion spring 86
It is urged in the counterclockwise direction by the (first spring). A locking wall 81a (stopper) is formed at the front end of the casing 81, and the lower end of the locking wall 81a is brought into contact with the operation lever 82 that is biased to rotate.
2 are determined. In this initial position, the operating portion 82a of the operating lever 82 faces directly downward, and the engaging portion 82x faces horizontally rearward.

The link lever 83 has a torsion spring 87
(Second spring) is urged in a counterclockwise direction.
The counterclockwise rotation of the link lever 83 is performed by the ball 71 at the rear end of the wire 70 as described above.
Is limited by being locked to the claw 63c of the second lever, whereby the initial position of the cooperation lever 83 is determined. The elastic force of the torsion spring 87 is weaker than the elastic force of the torsion spring 86 for urging the operation lever to rotate and the coil spring 64 for urging the operating plate 63 to rotate. As shown in FIG. 4A, when the operation lever 82 and the cooperation lever 83 are at the initial position, the engaging portion 83x of the cooperation lever 83 is
Is located below the engaging portion 82x and is separated from the engaging portion 82x.

The wire 70 is inserted through a flexible tube 75. The front end of the flexible tube 75 is fixed to the rear wall 81b of the casing 81 as shown in FIG. 4A, and the rear end is fixed to the claw 61a of the support plate 61 as shown in FIG. I have. This allows
The turning power of the cooperation lever 83 of the operation mechanism 70 is
Is transmitted to the operating plate 63 of the lock mechanism 60 via the.

In the height adjusting device 1 having the above configuration,
The operation will be described with reference to an example in which the height is adjusted in a state where the seat frame 20 is at the highest position and a person is sitting on the cushion 25 as shown in FIG. When the occupant sitting in the seat A hooks the operation portion 82a of the operation lever 82 in the initial position with his / her finger and pulls the operation lever 82 against the torsion spring 86 as shown in FIG. Rotate clockwise. Then, the engaging portion 82x of the operation lever 82 hits the engaging portion 82x of the cooperation lever 83, and pushes down the engaging portion 82x. Thereby, the cooperation lever 83 is connected to the coil spring 6 of the lock mechanism 60.
4 rotates counterclockwise against the elastic force of 4.

The counterclockwise rotation of the link lever 83 pulls the wire 70, and through the engagement between the ball 71 of the wire 70 and the claw 63c of the operation plate 63 shown in FIG. Is rotated counterclockwise. In the first stage of rotation of the operating plate 63, the cam holes 6
Since the pins 67 only move relatively along the front edge of the lock plate 62, the operation plate 63
Is not transmitted. In the second stage of the operation plate 63, the inclined upper edge of the cam hole 63 b pushes down the pin 67, so that the lock plate 62 rotates counterclockwise, and the engaging claw 62 a of the lock plate 62 is eventually It comes off from the gear part 31a, and it will be in an unlocked position (unlocked state).

The arm 3 depends on the weight of the seated occupant.
A counterclockwise force is acting on 1, and when the lock is released as described above, the arm 31 rotates in the same direction and the seat frame 20 moves downward. However, for a reason to be described later, the lock release time is very short, and the arm 31 is moved from the rotational position of P1 in FIG.
Does not rotate at a stroke to the turning position, and is locked again when the turning position of P2 is reached. Therefore, the seat frame 20 is locked at the height of the next step without descending from the uppermost position to the lowermost position at a stretch.

The above-described unlocking and re-locking can be realized by using two levers for the operation mechanism 80, namely, the operation lever 82 and the cooperation lever 83.
That is, as described above, the cooperation lever 83 is rotated in accordance with the rotation operation of the operation lever 82, and the state shown in FIG. 4B is reached. The lock plate 62 reaches the lock release position when the cooperation member 83 reaches this rotation position or immediately before (in the vicinity of) the rotation position.

When the occupant continues to rotate the operation lever 82, the engagement between the engagement portion 82x of the operation lever 82 and the engagement portion 83x of the cooperation lever 83 is released. Then, the operation plate 63 of the lock mechanism 60 is released from the rotation operation force of the operation lever 82 and rotates clockwise by the elasticity of the coil spring 64. Thereby, the lower edge of the cam hole 63b of the operation plate 63 pushes the pin 67,
The lock plate 62 is rotated clockwise to the lock position. As described above, since the arm 31 rotates in the unlocked state and immediately returns to the locked state, the engaging claw 62a of the lock plate 62 is engaged with the gear 31a of the arm 31.
Are shifted by one pitch. As a result, the arm 31 is locked at the rotation position P2.

At the time of re-locking, the operation plate 63
With the clockwise rotation of, the wire 70 is pulled backward, whereby the cooperation lever 83 is returned to the initial position as shown in FIG. As described above, the occupant releases the operation lever 82 when the seat frame 20 is lowered by one stage by the rotation operation of the operation lever 82. Thus, the operation lever 82 rotates counterclockwise by the elastic force of the torsion spring 86 and returns to the initial position. At this time, the engaging portion 82x of the operation lever 82 is
However, since the elastic force of the torsion spring 86 is stronger than the elastic force of the torsion spring 87, this engaging portion 83x
Raise x and return to the initial position. This engagement portion 83x
When jumping up, the cooperation lever 83 once rotates clockwise, but returns to the original initial position by the elastic force of the torsion spring 87. When the cooperation lever 83 is flipped up and rotated clockwise, the claw 6 of the operation plate 63 is moved.
The wire 70 penetrating through 3 c is retracted, and the ball 71
This rotation is enabled by once separating from c.

If the occupant is not satisfied with the one-step descent, the occupant can lower the occupant by one more step by rotating the operation lever 82 in the same manner as described above. By rotating the lever 82, the lever 82 can be lowered to the lowermost stage as shown in FIG.
At this time, the rotation position of the arm 31 changes stepwise to P2, P3, and P4 every time the operation lever 82 is rotated.

Next, a description will be given of a case where the seat is adjusted to a higher position. In this case, the occupant floats from the cushion 25. Then, the upward force by the spiral spring 50 and the air spring 55 acts on the seat frame 20 instead of the downward force by the weight of the occupant. When the operating lever 82 is rotated in this state, the unlocking and re-locking of the arm 31 are performed in the same manner as described above each time the rotating operation is performed, and the arm 31 is moved by one pitch of the gear portion 31a. The seat is turned, and the turning position is adjusted stepwise as P4, P3, P2, and P1, and accordingly, the seat frame 20 is adjusted stepwise from the lowermost position to the uppermost position.

As shown in FIG. 5, the two seats A of the rear seat can be independently adjusted in height, the cushion 25 is lowered for a person with a high sitting height, and the cushion 25 is for a person or a child with a low sitting height. 25 can be increased.
Further, when an occupant sits on one seat A and the other seat A is vacant, the cushion 25 of the other seat A is used as an armrest by lowering one seat A and raising the other seat A. be able to. At this time, the backrest 29 of the other seat A is defeated, and
Can be used as an armrest. In addition, the rear seat may be divided into three seats and each may be adjusted in height.

The present invention is not limited to the above embodiment, but can adopt various forms. For example, the lock mechanism may be provided on the seat frame to lock the upper end of the arm. In this case, a rigid member such as a rod may be used instead of the wire as the transmission member.
Further, the lock mechanism may use a friction brake instead of the engagement between the gear portion and the engagement claw. In this case,
Stepless height adjustment.

[0034]

As described above, according to the first aspect of the present invention, the rear seat of the automobile is divided into a plurality of seats, and the heights of these seats are adjusted independently of each other. Depending on the sitting height of the crew
A comfortable seating state can be guaranteed for the occupant. In addition, when the height of the seat portion of the adjacent seat is different and the occupant sits on the lower seat, the seat portion or the backrest of the other seat can be used as an armrest. Claim 2
According to the invention, since the pair of left and right parallel link mechanisms is constituted by the four leg members, the seat can be stably supported. Further, since locking is performed by prohibiting rotation of one leg member by the lock mechanism, the lock mechanism can be simplified.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing a seat height adjusting device according to an embodiment of the present invention, showing a state where a seat is highest.

FIG. 2 is a view corresponding to FIG. 1 showing a state where a seat is the lowest in the height adjusting device, and shows a part of components in FIG.

FIG. 3 is an enlarged side view of a lock mechanism in the device.

FIG. 4 is an enlarged side view of an operation mechanism of the device.
(A) shows a non-operation state, (B) shows a state when the lock mechanism is unlocked by operating the operation lever,
(C) shows that the engagement between the operation lever and the cooperation lever is released,
This shows the state when the lock mechanism is re-locked.

FIG. 5 is a front view showing a state where the heights of left and right seats of a rear seat are adjusted by the device.

[Explanation of symbols]

 A Seat 1 Height Adjuster 10 Base Frame 20 Seat Frame 25 Cushion (Seat) 30 Support Mechanism (Parallel Link Mechanism) 31 Arm (Leg Member) 32 Link (Leg Member) 60 Lock Mechanism 80 Operation Mechanism

Claims (2)

[Claims] 1. A rear seat of an automobile, wherein a plurality of divided seats are arranged adjacent to each other, and each seat is provided with a height adjusting device so that the height of a seat portion can be adjusted. 2. Each of the seats includes a base frame and a seat frame positioned above the base frame to form a skeleton of the seat. The height adjusting device includes two leg members arranged on the left and right sides. The two ends of these leg members are rotatably connected to the base frame and the seat frame to form a pair of left and right parallel link mechanisms. Further, the height adjustment device includes one of the parallel link mechanisms. 2. The rear seat of an automobile according to claim 1, further comprising: a lock mechanism for inhibiting rotation of the leg member and locking the lock mechanism; and an operating mechanism provided on the seat frame for unlocking the lock mechanism. .