JP2002345589A - Seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a comfortable sitting attitudes by securing a broader space about feet even under the reclining state while preventing increase in the weight of a seat back frame, a link or the like along with a reduction in cost and a lighter weight. SOLUTION: A seat back 12 is divided in two vertically and the upper half 14a of the seat back frame is supported on a body panel 20 through link arms 24 and 25 to receive a load working on the seat back 12 on the side of the body panel 20. A rotating force of a motor 30 is converted to a linear motion with a feed screw mechanism so that the link arms 24 and 25 are operated to turn to shift the seat back 12 to the reclining position and the mid-folded position while a seat cushion frame 13 linked to the lower half part 14b of the seat back frame 13 is supported through a link arm 22 at the front end thereof thereby interlocking the cushion tilt of the seat cushion 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat and, more particularly, to a seat cushion supported on a floor portion of a vehicle body panel, and a seat back divided into upper and lower parts, and supported by the vehicle body panel so as to be bent and reclined. Vehicle seat to be used.

[0002]

2. Description of the Related Art FIGS. 11 (a) and 11 (b) show the structure of a rear seat 1 in a sedan type passenger car, respectively.
FIG. 11A shows a reference position, and FIG. 11B shows a state at the time of reclining.

[0003] This type of rear seat 1 is composed of a seat cushion 2 on which an occupant sits and a seat back 3 which serves as a backrest of the occupant. In order to make it impossible to fall down to the rear side and to bring it to the reclining state shown in FIG. 11B, the slide device 5 fixed to the lower surface of the seat cushion 2 is moved by the floor portion 4a of the vehicle body panel 4.
As it slides along the surface, the upper half portion 3a and the lower half portion 3b of the seat back 3 slide downward with respect to the guide bracket 6 attached to the vehicle body panel 4 to be in a reclining state.

The structure of the guide bracket 6 is as follows.
The slide pin 6a of the guide bracket 6 is provided with an elongated hole 6c of a plate 6b provided on the back surface of the upper half portion 3a of the seat back 3.
When the slide device 5 operates and the seat cushion 2 slides forward, the seat back 3
Is retracted downward, and the slide pin 6a is
Is guided in the long hole 6c, the upper half portion 3a of the seat back 3 slides downward, and the upper half portion 3a and the lower half portion 3b of the seat back 3 are folded in the middle, so that the reclining posture is obtained. Can be secured.

Further, as shown in FIG. 12, a structure in which the seat back 3 is tiltably supported by a recliner 7 is also employed. In this case, the slide device 5 is not provided, and the front of the seat cushion 2 is not provided. The side is attached to the floor portion 4a of the vehicle body panel 4 via the link arm 8.

In order to perform the reclining operation of the seat back 3, the recliner 7 is operated to tilt the seat back 3 rearward, so that the reclining state shown by the dotted line in FIG. 12 can be secured.

[0007]

As described above, in the conventional sedan type rear seat 1, for example, FIG.
In the type in which the seat cushion 2 is slidable in the front-rear direction by the slide device 5 shown in (a) and (b), when the reclining state shown in FIG.
The front end of the seat cushion 2 is located forward, and the foot space of the occupant sitting on the rear seat 1 (reference numeral d in the figure)
(Indicated by (1)) is very narrow, giving a feeling of oppression to the occupant and making it impossible to secure a comfortable sitting posture.

Further, in a structure in which the seat back 3 is reclineably supported by the recliner 7 shown in FIG. 12, the load applied to the seat back 3 is concentrated on the recliner 7 in a sitting state or a rear collision, so that the seat back 3 is not provided. It has been pointed out that it is necessary to strongly reinforce the frame structure of No. 3 and the cost spent on the reinforcing structure increases, which leads to an increase in cost, an increase in the weight of the rear seat 1 and a reduction in fuel efficiency. .

It is an object of the present invention to provide a vehicle seat suitable for a rear seat of a sedan type passenger car, which can secure a wide foot space even in a reclining state, obtain a comfortable sitting posture, and provide a seat back. An object of the present invention is to provide a vehicle seat that can contribute to cost reduction and weight reduction without increasing the weight of a frame, a link, and the like.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. In a vehicle seat according to the first aspect of the present invention, a seat cushion is supported on a floor portion of a vehicle body panel. At the same time, the seat back is divided into upper and lower parts,
A vehicle seat which is supported by a vehicle body panel so as to be bent and reclined, wherein an upper half portion of the seat back frame is attached to the vehicle body panel via a link arm, and the link arm is rotated to rotate the vehicle body. An upper half of the seat back is supported so as to be able to move parallel to the panel, and an upper portion of the lower half of the seat back frame is connected to a lower portion of the upper half of the seat back frame by a connecting pin. The lower part of the lower half is rotatably supported by the hinge bracket of the vehicle body panel,
With the parallel movement of the upper half of the seat back, the seat back is bent and reclined, and the lower half of the seat back frame is connected to the seat cushion frame. By being connected to the panel via the link arm, the seat back is bent in the middle and the front end portion of the seat cushion is lifted upward during the reclining operation.

According to the vehicle seat of the first aspect, the seat back has a two-part structure, and the upper half frame of the seat back is supported by the vehicle body panel via the link arm. Since the load applied to the seat back is transmitted to the body panel via the link arm,
There is no need for the seat back frame to have a heavy and strong reinforcing structure.

According to a second aspect of the present invention, in the vehicle seat, an upper half portion of the seat back frame is attached to a vehicle body panel via a pair of upper and lower link arms, and a feed screw mechanism for transmitting rotational driving force of a motor. The upper half portion of the seat back is supported so as to be able to move in parallel to the vehicle body panel by rotating the pair of upper and lower link arms.

According to the vehicle seat of the present invention, in order to shift the vehicle seat to the reclining posture, if the motor is driven to rotate, it is screwed into the rotation shaft of the motor by the feed screw mechanism. Nuts perform linear motion,
The linear movement of the nut acts on one end of the link arm, and the other end of the link arm is rotatably attached to the frame of the upper half of the seat back. By rotating the motor, the link arm rotates. The upper half of the seat back slides downward while maintaining a state parallel to the vehicle body panel surface.

According to a third aspect of the present invention, there is provided a vehicle seat wherein a hinge bracket for attaching a lower portion of a lower half of the seat back frame to a vehicle body panel comprises a reclining mechanism.

According to the vehicle seat of the third aspect, by operating the reclining mechanism, the lower half of the seat back frame can be rotated, and the upper half and the lower half of the seat back can be rotated. Since each frame can be bent and reclined, and the front end of the seat cushion frame is supported on the floor of the vehicle body panel via the link arm, the front side of the seat cushion is lifted upward.

According to a fourth aspect of the present invention, there is provided a vehicle seat wherein a link arm connecting a front end portion of the seat cushion frame to a floor panel converts a rotational driving force of a motor into a linear reciprocating motion by a feed screw mechanism. It is driven by a screw motor.

According to the vehicle seat of the present invention, the link arm connecting the front end portion of the seat cushion frame to the floor panel converts the rotational driving force of the motor into linear reciprocating motion by the feed screw mechanism. Driven by a screw motor, the nut is screwed to the rotating shaft of the motor by the feed screw mechanism by driving the motor to rotate, and the linear movement of the nut turns the link arm into a rotational movement. In other words, the front side of the seat cushion is lifted upward, and the upper and lower frames of the seat back can be folded and reclined.

In the vehicle seat according to a fifth aspect of the present invention, the upper half portion and the lower half portion of the seat back frame are connected to each other by inserting a connecting pin into an elongated hole so as to be slidable in the vertical direction. It is characterized by the following.

According to the vehicle seat of the fifth aspect, the upper and lower frames of the seat back are slidably connected via the elongated holes, and the upper and lower frames of the seat back are connected to each other. The lower half of the seat back frame pivots on the hinge portion in conjunction with the sliding operation of the half portion, so that the seat back is in a folded state. At this time, the lower end of the lower half of the seat back frame is connected to the seat cushion frame, and the front end of the seat cushion frame is supported on the floor of the vehicle body panel via the link arm. Will be lifted. Therefore, the seat cushion does not move much forward and has a large seating surface angle, so that the foot space of the occupant is not restricted, and a sufficient sitting space can be secured, and a comfortable sitting posture can be obtained. .

According to a sixth aspect of the present invention, in the vehicle seat, an upper half portion of the seat back frame is attached to a vehicle body panel via a pair of upper and lower link arms, and an upper half portion of the seat back frame. Long holes extending in the vertical direction are respectively formed at the vertical positions, and pivot pins at one ends of a pair of upper and lower link arms are respectively inserted into the long holes.

According to the vehicle seat of the present invention, elongated holes extending in the vertical direction are respectively formed in the upper and lower positions of the upper half portion of the seat back frame, and each of the elongated holes has one of a pair of upper and lower link arms. Since the pivot pins at the ends are inserted respectively, it is possible to absorb the mechanical deviation of the connecting part of the upper half part and the lower half part of the seat back frame by the long hole,
The relative movement of the upper half and lower half of the seat back frame eliminates the discomfort that the back of the occupant is compressed, and the overlap between the upper half and lower half of the seat back frame Prevents the pad material from being crushed and the skin material from wrinkling, reducing frictional resistance during operation,
It is possible to prevent the motor from being overloaded.

According to a seventh aspect of the present invention, in the vehicle seat according to the second aspect, the lower half of the seat back frame is pin-connected to the upper half of the seat back frame. The hinge pin of the hinge bracket attached to the vehicle body panel is slidably inserted into an elongated hole provided below the lower half of the seat back frame.

According to the vehicle seat of the present invention, the seat back is divided into upper and lower parts, and the upper half of the seat back frame is supported on the vehicle body panel side via the link arm. Since the load applied to the upper half of the vehicle is transmitted to the vehicle body panel via the link arm, there is no need to construct the seat back frame with a heavy and strong reinforcing structure. To shift, if the motor is driven to rotate, the nut screwed to the rotation shaft of the motor by the feed screw mechanism performs linear motion, and the linear motion of this nut acts on one end of the link arm, The other end of the seat is rotatably attached to the upper half frame of the seat back, so that if the motor is driven to rotate, the link arm rotates and the seat Upper half portion of the click performs the operation sliding downward while maintaining the parallel state and the vehicle body panel.

Further, the frame of the lower half of the seat back is pin-joined to the frame of the upper half and connected to the hinge bracket on the vehicle body side by a long hole. With the downward translation,
The lower half of the seat back frame simultaneously slides downward and pivots, the lower half of the seat back frame is connected to the seat cushion frame, and the front end of the seat cushion frame is a vehicle body panel. Since the seat back is supported by the (floor portion) and the link arm, the front side of the seat cushion is lifted upward in conjunction with the sliding and folding of the seat back.

Therefore, since the seat cushion does not move so much forward, a large foot space can be ensured, and the rear portion of the seat cushion can be dropped downward. A larger size can be secured.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a vehicle seat according to the present invention will be described below in detail with reference to the drawings. In the present embodiment, the vehicle seat according to the present invention is applied to a rear seat of a sedan type passenger car, but is not limited to this. 1 and 2 show a first embodiment of a vehicle seat according to the present invention. FIG. 1 is a side view showing a reference posture, FIG. 2 is a side view showing a reclining posture, and FIGS. FIG. 3 is a side view showing a reference posture, FIG. 4 is a side view showing a reclining posture, and FIGS. 5 and 6 show a third embodiment of the present invention. FIG. 6 is a side view showing the reference posture, and FIG. 6 is a side view showing the reclining posture. FIGS. 7 and 8 show the fourth embodiment of the present invention. FIG. 7 shows the reference posture, and FIG. 9 and FIG. 1 are explanatory side views.
0 is a fifth embodiment of the present invention, FIG. 9 is a side view showing a reference posture, and FIG. 10 is a side view showing a reclining posture.

A first embodiment of the present invention will be described with reference to FIGS. 1 and 2. A vehicle seat 10 is roughly composed of a seat cushion 11 on which an occupant sits and a seat back 12 which serves as a backrest of the occupant. The seat back 12 is divided into upper and lower parts (the upper half part 12a and the lower half part 12a).
b) It is in a state in which reclining and folding can be performed.

Next, the support structure of the seat cushion 11 and the seat back 12 will be described.
The seat cushion frame 13 is supported by a bracket 21 of a floor portion 20a of the vehicle body panel 20 via a link arm 22, and the link arm 22 is linked by rivets 22a and 22b.

Next, the upper half portion 12 of the seat back 12
a and the lower half portion 12b respectively correspond to the corresponding frames 14a,
The frame 14a of the upper half portion 12a of the seat back is also rotatably supported on the upper and lower terminal sides of a bracket 23 fixed to the rear vertical wall portion 20b of the vehicle body panel 20. Parts 24a, 25
a link arm 24 rotatably supported based on a.
25 is attached to one end 24b, 25b.

The frame 14b in the lower half 12b of the seat back is connected to the rear vertical wall 2 of the vehicle body panel 20.
0b is rotatably supported via a hinge pin 26a on a hinge bracket 26 fixed to a lower side of the frame 14b, and an elongated hole 27 is formed on the upper end side of the frame 14b in the lower half portion 12b of the seat back. The connection pin 27a fixed to the lower end of the frame 14a in the upper half portion 12a of the seat back is inserted into the elongated hole 27, and the lower end of the frame 14b of the lower half portion 12b of the seat back is seated. Cushion frame 1
3 and a rivet 13a for pivotal support.

Further, in the vehicle seat 10 according to the present invention, the driving force of the motor is used as a drive source when the vehicle seat 10 is shifted to the reclining posture.

That is, the rear vertical wall portion 20b of the vehicle body panel 20
, A motor 30 is mounted via a motor mounting bracket 31, a screw is engraved on the outer periphery of a rotating shaft 30 a of the motor 30, a nut 32 is fitted into the screw portion, and the nut 32 is Terminal 24c of link arm 24
And a terminal 25c of the link arm 25 on the other side via a connection shaft 33.

Therefore, if the motor 30 is driven to rotate,
The nut 32 moves up and down along the rotating shaft 30a by the feed screw mechanism in accordance with the forward and reverse rotation directions of the motor 30, and the link arms 24 and 25 move with the up and down movement of the nut 32.
Are rotated so that the upper half 1 of the seat back
2a performs parallel movement in a direction approaching or leaving the rear vertical wall portion 20b of the vehicle body panel 20.

For example, when the motor 30 rotates in the forward direction, the nut 32 moves upward along the axial direction of the rotating shaft 30a, so that the link arms 24 and 25 supported by the bracket 23 are respectively shown in FIG. 1, the upper half portion 12 of the seat back is rotated in a counterclockwise direction.
As shown in FIG. 2, a slides in the downward direction and in a direction approaching the rear vertical wall portion 20b of the vehicle body panel 20, and the sliding operation of the upper half portion 12a of the seat back causes the frame 14a of the upper half portion 12a of the seat back. 1 of the lower half portion 12b of the seat back which is connected to the
4b, the frame 14b rotates clockwise based on the hinge pin 26a of the hinge bracket 26 when the connecting pin 27a is located on the opposite side of the elongated hole 27, and the seat back frames 14a, 14b cause the seat 14 to rotate in the clockwise direction. The back 12 is in a folded state and is in a reclining state.

Further, since the frame 14b of the lower half portion 12b of the seat back and the seat cushion frame 13 are pivotally supported via the rivets 13a, the frame 14b of the lower half portion 12b of the seat back rotates clockwise in FIG. 2, the front side of the seat cushion frame 13 is lifted upward by the link arm 22, and the vehicle seat 10 can be shifted to the reclining posture as shown in FIG.

In the reclining position shown in FIG. 2, since the seat cushion 11 does not protrude so much, a large foot space can be secured, and a comfortable sitting posture without pressing the foot portion can be obtained. Since the back 12 is supported by the bracket 23 fixed to the rear vertical wall portion 20b of the vehicle body panel 20 via the link arms 24 and 25, it is necessary to use a costly and heavy reinforcing structure as the seat back frame 14. There is an advantage that it can be manufactured at low cost, can be reduced in weight, and can maintain good fuel efficiency.

FIGS. 3 to 10 show different embodiments of the present invention. In these drawings, the same reference numerals are given to the portions corresponding to the configuration shown in the first embodiment. 3 and 4, a second embodiment of the present invention is shown, and the lower part of the seat back of the first embodiment is shown in FIGS. Slot 2 on the upper end side of frame 14b in half portion 12b
7 and the connecting pin 27a inserted into the elongated hole 27,
A vertically extending long holes 27, 27 are respectively formed at the upper and lower positions of a, and the pivotal pins 28 of one ends 24b, 25b of a pair of upper and lower link arms 24, 25 are formed in the long holes 27, 27, respectively.
Motors 30 except that each is inserted.
It has the same configuration as the first embodiment, such as the drive configuration of the first embodiment.

Also in the second embodiment of the present invention, when the motor 30 rotates in the forward direction, the nut 32 moves upward along the axial direction of the rotating shaft 30a, so that the bracket 23 Link arm 2 supported
4, the upper half portion 12a of the seat back is rotated downward in the counterclockwise direction in FIG. 4, so that the upper half portion 12a of the seat back moves downward and approaches the rear vertical wall portion 20b of the vehicle body panel 20, as shown in FIG. And the frame 14b of the lower half portion 12b of the seat back is moved by the sliding operation of the upper half portion 12a of the seat back.
Turn clockwise based on the seat back frame 1
4a and 14b, the seat back 12
Is in a folded state and is in a reclining state.

Since the frame 14b of the lower half 12b of the seat back and the seat cushion frame 13 are pivotally supported via the rivets 13a, the frame 14b of the lower half 12b of the seat back rotates clockwise in the drawing. , The front side of the seat cushion frame 13 is lifted upward, and the vehicle seat 10 can be shifted to the reclining posture as shown in FIG.

According to the second embodiment, the mechanical deviation of the connecting portion between the upper half portion 14a and the lower half portion 14b of the seat back frame 14 can be absorbed by the long holes 27, 27. Upper half 14 of back frame 14
a and the lower half portion 14b can eliminate the discomfort that the back of the occupant is compressed, and the upper half portion 14a and the lower half portion 14b of the seat back frame 14 can be eliminated.
, The pad material is prevented from being crushed and the skin material is prevented from wrinkling, the frictional resistance during operation is reduced, and the motor 30 can be prevented from being overloaded.

FIGS. 5 and 6 show a third embodiment of the present invention. This third embodiment is fixed to a lower portion of a rear vertical wall portion 20b of a vehicle body panel 20. Instead of the hinge bracket 26 that is rotatably supported by the hinge bracket 26 via the hinge pin 26a.
6, a reclining mechanism 36 of a power or manual configuration is provided, the rotational driving force of the motor 30 is converted into a linear reciprocating motion by a feed screw mechanism, and the configuration of rotating the pair of upper and lower link arms 24, 25 is eliminated. Except for the above, it has the same configuration as the first embodiment.

As shown in FIGS. 5 and 6, the base 36a of the reclining mechanism 36 is fixed to the rear vertical wall portion 20b.
By configuring the frame 14b of the lower half portion 12b of the seat back as the arm 36b, the inclination angle of the frame 14b can be adjusted, and the vehicle seat 10 can be shifted to the reclining posture as shown in FIG.

FIGS. 7 and 8 show a fourth embodiment of the present invention. In the fourth embodiment, the seat cushion frame 13 is connected to the floor portion 20 of the vehicle body panel 20.
a, a motor 30 similar to that of the first embodiment, and a threaded portion on the outer periphery of a rotating shaft 30a of the motor 30 are supported by a link arm 22 rotatably supported by a bracket 21 provided on the bracket 21a. The link arm 22 is driven to rotate by a lead screw motor including a nut 32 to be combined. When the nut 32 is connected to one arm piece 22c of the link arm 22 formed in a substantially V shape, the rotational driving force of the motor 30 is increased by the rotation of the rotary shaft 30a as a feed screw mechanism. 30a
The link arm 22 formed in a substantially V-shape is rotationally driven by linearly reciprocating above.

The linear movement of the nut 32 changes the link arm 22 into a rotating movement, the front side of the seat cushion 11 is lifted upward, and the frames 14a, 14b of the upper half portion 12a and the lower half portion 12b of the seat back 12 are moved. It can be folded and reclined.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. Also in the fifth embodiment, a screw is engraved on a rotating shaft 30a of a motor 30 mounted on a rear vertical wall portion 20b of a vehicle body panel 20 via a bracket 31, and a nut 32 is mounted on the screw portion.
The link arm 24 is rotated by a so-called feed screw mechanism into which the link arm 25 is inserted, as in the first embodiment, but the link arm 25 is not directly driven by the feed screw mechanism. The driven operation is performed by the operation of the frame 14a in the upper half portion 12a.

In the fifth embodiment, the frame 1 in the lower half portion 12b of the seat back is provided.
The configuration of 4b is different from that of the first embodiment. That is, the upper half portion 14a and the lower half portion 14b of the seat back frame
Are not connected by the elongated holes 27, but are simply connected by the connecting pins 27.
The lower half portion 14b of the seat back frame is slidably fitted in the elongated hole 27 of the lower half portion 14b of the seat back frame in the lower half portion 14b of the seat back frame simply by linking with the a.

Therefore, from the reference position shown in FIG.
0, the upper arm 12a of the seat back performs a parallel movement by rotating the link arms 24 and 25 in conjunction with the nut 32 being fed upward, and In conjunction with this, the lower half portion 14b of the seat back frame performs the parallel movement and the rotation operation based on the hinge bracket 26.

As described above, the seat back frame 12 is reclined and bent in the middle, and the seat cushion frame 13 connected to the lower half portion 14b of the seat back frame has the link arm 22 in the counterclockwise direction in the drawing. By pivoting, as shown in FIG. 10, the front side is lifted up in a state where the seat surface angle of the seat cushion 11 is secured large, and it is possible to easily operate in a comfortable reclining posture.

Also in the fifth embodiment, the seat back 12 is supported by link arms 24 and 25, and the load applied to the seat back 12 is transmitted through the link arms 24 and 25 to the rear of the vehicle body panel 20. Since it is transmitted to the vertical wall portion 20b side, there is no need to configure the seat back frame 14 with a strong reinforcing material,
While reducing costs and weight,
Slot 2 provided in lower half portion 14b of seat back frame
7 is received by the hinge bracket 26, so that the upward inclination angle of the seat cushion 11 can be set to be even larger, so that there is an advantage that a more comfortable reclining posture can be secured.

[0050]

As described above, according to the vehicle seat according to the first aspect of the present invention, the seat back has a vertically divided structure, and the upper half frame of the seat back is connected to the vehicle body via the link arm. Since the load applied to the seat back is supported by the panel and transmitted to the vehicle body panel via the link arm, the seat back frame does not need to have a heavy and strong reinforcing structure.

According to the vehicle seat according to the second aspect of the present invention, in order to shift the vehicle seat to the reclining posture, the motor is driven to rotate, and the feed screw mechanism is used to screw the rotation shaft of the motor. The mating nut performs a linear motion, the linear motion of the nut acts on one end of the link arm, and the other end of the link arm is rotatably mounted on the frame of the upper half of the seat back, thereby enabling the motor to rotate. By rotating the link arm, the link arm rotates, and the sliding operation can be performed downward while the upper half portion of the seat back is kept parallel to the vehicle body panel surface. In addition, the front side of the seat cushion will be lifted up,
The effect of the seat cushion is that there is little forward movement and the seating surface angle is large, so that the foot space of the occupant is not restricted and the seating space can be sufficiently secured and a comfortable sitting posture can be obtained. Having.

According to the vehicle seat of the third aspect of the present invention, since the hinge bracket for attaching the lower part of the lower half of the seat back frame to the vehicle body panel comprises a reclining mechanism, the reclining mechanism is operated. Thereby, the lower half portion of the seat back frame can be rotated, each frame of the upper half portion and the lower half portion of the seat back can be bent and reclined, and the front end of the seat cushion frame is connected via the link arm. As a result, the seat cushion is lifted upward on the front side.

Further, according to the vehicle seat of the present invention, the link arm connecting the front end portion of the seat cushion frame to the floor panel causes the rotational driving force of the motor to reciprocate linearly by the feed screw mechanism. Since the motor is driven by a lead screw motor for conversion, by rotating the motor, the nut screwed to the rotation shaft of the motor by the feed screw mechanism performs a linear motion, and the linear motion of the nut rotates the link arm. Change to dynamic action,
The front side of the seat cushion is lifted upward, and the upper and lower frames of the seat back can be folded and reclined.

According to the vehicle seat according to the fifth aspect of the present invention, each of the upper and lower frames of the seat back is slidably connected through a long hole, The lower half portion of the seat back frame pivots on the hinge portion in conjunction with the sliding operation of the upper half portion of the back, so that the seat back is in a folded state. At this time, the lower end of the lower half of the seat back frame is connected to the seat cushion frame, and the front end of the seat cushion frame is supported on the floor of the vehicle body panel via the link arm. Will be lifted. Therefore, the seat cushion does not move much forward and has a large seating surface angle, so that the foot space of the occupant is not restricted, and a sufficient sitting space can be secured, and a comfortable sitting posture can be obtained. .

According to the vehicle seat according to the sixth aspect of the present invention, elongated holes extending in the vertical direction are respectively formed in the upper and lower positions of the upper half portion of the seat back frame, and a pair of upper and lower links are formed in the elongated holes. Since the pivot pins at one end of the arm are inserted respectively, the mechanical displacement of the connecting portion between the upper half portion and the lower half portion of the seat back frame can be absorbed by the long hole, and the upper portion of the seat back frame can be absorbed. The relative movement of the half part and the lower part can eliminate the discomfort that the back of the occupant is compressed and the pad material of the overlap of the upper part and the lower part of the seat back frame is crushed, It is possible to prevent wrinkles from occurring on the skin material, reduce frictional resistance during operation, and prevent overload from being applied to the motor.

Next, according to the vehicle seat of the present invention, the seat back is divided into upper and lower portions, and the upper half frame of the seat back is supported on the vehicle body panel side via the link arm. As a result, the load applied to the upper half of the seat back is transmitted to the vehicle body panel via the link arm, so that the seat back frame does not need to be formed of a heavy and strong reinforcing structure, and the vehicle seat is not required. In order to shift to the reclining posture, if the motor is driven to rotate, the nut screwed to the rotation shaft of the motor by the feed screw mechanism performs a linear motion, and the linear motion of this nut acts on one end of the link arm Then, the other end of the link arm is rotatably attached to the upper half frame of the seat back, so that if the motor is rotationally driven, the link arm rotates, Since the upper half of the rear bag slides downward while maintaining the state parallel to the vehicle body panel surface, as described above, it is advantageous in terms of cost, lighter weight, and smooth reclining. This has the effect that operability can be obtained.

The lower half frame of the seat back is pin-joined to the upper half frame and is connected to the hinge bracket on the vehicle body side by a long hole. With the downward translation,
The lower half of the seat back frame simultaneously slides downward and pivots, the lower half of the seat back frame is connected to the seat cushion frame, and the front end of the seat cushion frame is a vehicle body panel. Since the seat cushion is supported by the (floor portion) and the link arm, the front side of the seat cushion is lifted upward in conjunction with the sliding and folding of the seat back, and the seat cushion does not move so much forward. As a result, a large foot space can be secured, and the rear portion of the seat cushion can be dropped downward, so that a large seating surface angle of the seat cushion can be secured and a more comfortable reclining posture can be obtained. .

[Brief description of the drawings]

FIG. 1 is an explanatory side view showing a state before a reclining operation according to a first embodiment of a vehicle seat according to the present invention.

FIG. 2 is an explanatory side view showing a state after the reclining operation in the first embodiment of the vehicle seat according to the present invention.

FIG. 3 is an explanatory side view showing a state before a reclining operation in a vehicle seat according to a second embodiment of the present invention.

FIG. 4 is an explanatory side view showing a state after a reclining operation in a vehicle seat according to a second embodiment of the present invention.

FIG. 5 is an explanatory side view showing a state before a reclining operation in a third embodiment of the vehicle seat according to the present invention.

FIG. 6 is an explanatory side view showing a state after a reclining operation in a third embodiment of the vehicle seat according to the present invention.

FIG. 7 is an explanatory side view showing a state before a reclining operation in a vehicle seat according to a fourth embodiment of the present invention.

FIG. 8 is an explanatory side view showing a state after a reclining operation in a vehicle seat according to a fourth embodiment of the present invention.

FIG. 9 is an explanatory side view showing a state before a reclining operation in a fifth embodiment of the vehicle seat according to the present invention.

FIG. 10 is an explanatory side view showing a state after a reclining operation in a fifth embodiment of the vehicle seat according to the present invention.

FIG. 11 is a side view showing the configuration of a rear seat in which a slide device is mounted on a conventional seat cushion, showing (a) a state before a reclining operation and (b) a state after a reclining operation.

FIG. 12 is an explanatory side view showing a rear seat in a conventional sedan type passenger car.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vehicle seat 11 Seat cushion 12 Seat back 12a Upper half of seat back 12b Lower half of seat back 13 Seat cushion frame 14 Seat back frame 14a Upper half of seat back frame 14b Lower half of seat back frame 20 Body Panel 20a Floor portion 20b Rear vertical wall portion 21 Bracket 22 Link arm 22c Arm piece 23 Bracket 24 Link arm 25 Link arm 26 Hinge bracket 26a Hinge pin 27 Slot 27a Connection pin 28 Pivot pin 30 Motor 31 Bracket for motor mounting 32 Nut 36 Reclining mechanism 36a Base 36b Arm

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tohru Kondo 771 Kozono, Ayase-shi, Kanagawa Johnson Controls Automotive Systems, Inc. F-term (reference) 3B084 BA00 EB05 EC06 HA12 3B087 BD03 BD13 DA06 DA07 3B099 AA07 BA09 CA36 CB01

Claims (7)

[Claims] 1. A vehicle seat wherein a seat cushion is supported by a floor portion of a vehicle body panel, and a seat back is divided into upper and lower parts, and the vehicle body panel is supported by a vehicle body panel so as to be bent and reclined. The upper half portion of the frame is attached to the vehicle body panel via a link arm, and the link arm is rotated so that the upper half portion of the seat back is supported so as to be able to move parallel to the vehicle body panel. The upper portion of the lower half portion is connected to the lower portion of the upper half portion of the seat back frame by a connecting pin, and the lower portion of the lower half portion of the seat back frame is rotatably supported by a hinge bracket of the vehicle body panel. With the parallel movement of the half part, the seat back is bent and reclined, and the seat back The seat cushion frame is connected to the lower half of the seat cushion, and the front end of the seat cushion frame is connected to the floor panel via the link arm. A vehicle seat characterized in that a part is lifted upward. 2. An upper half portion of the seat back frame is attached to a vehicle body panel via a pair of upper and lower link arms, and converts a rotational driving force of a motor into a linear reciprocating motion by a feed screw mechanism. The upper half portion of the seat back is supported so as to be able to move in parallel with respect to the vehicle body panel by rotating the link arm.
A vehicle seat according to claim 1. 3. The vehicle seat according to claim 1, wherein a hinge bracket for attaching a lower portion of a lower half of the seat back frame to a vehicle body panel comprises a reclining mechanism. 4. A link screw for connecting a front end portion of the seat cushion frame to a floor panel is driven by a lead screw motor that converts a rotational driving force of the motor into a linear reciprocating motion by a feed screw mechanism. Item 4. A vehicle seat according to item 1. 5. An upper half portion and a lower half portion of the seat back frame are connected to each other by inserting a connecting pin into an elongated hole so as to be slidable in a vertical direction.
A vehicle seat according to claim 1. 6. An upper half portion of the seat back frame is attached to the vehicle body panel through a pair of upper and lower link arms, and a long hole extending vertically is formed at a vertical position of the upper half portion of the seat back frame. 2. The vehicle seat according to claim 1, wherein a pivot pin at one end of a pair of upper and lower link arms is inserted into the elongated hole. 7. A lower half of the seat back frame is pin-coupled to an upper half of the seat back frame, and a hinge pin of a hinge bracket attached to a vehicle body panel is provided below the lower half of the seat back frame. The vehicle seat according to claim 2, wherein the vehicle seat is slidably inserted into the provided long hole.