JPH08276769A - Variable seat - Google Patents

Abstract

PURPOSE: To switch a seat to a bucket shape and a flat shape in accordance with a number of seating persons, by adjusting a height of a pad supporter arranged in a lower surface of a pad in a seating position interposed between two seating positions. CONSTITUTION: In a variable seat 1 interposed between two seating positions, bu turning a knob 16, a rotary shaft 154 is rotated to make internal thread members 153a, 153b approach each other. Then by extending a jack 15 in a vertical direction, a panel 14 arranged in an upper end plate 151 of the jack is moved upward. Consequently, also a panel 13 is pressed upward with the panel 14, to protrude a central part 11a of a seat cushion 11. On the other hand, when the knob 16 is reversely turned, the internal thread members 153a, 153b are separated from each other, to contract the jack 15 in a vertical direction. Consequently, also the panel 13 is moved downward with the panel 14, to flat the central part 11a of the seat cushion 11. In this way, the seat can be easily switched to a bucket type and a flat type.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable seat whose seat shape can be switched between a bucket type and a flat type.

[0002]

2. Description of the Related Art Vehicle rear seats are mainly classified into bucket type and flat type. The bucket type seat has a raised side edge portion and a central portion of the seat cushion, and the raised side edge portion and the central portion hold the thigh of the occupant to stabilize the riding posture. Therefore, the bucket type seat is excellent in holding the body of the occupant while the vehicle is traveling.

In the flat type seat, the upper surface of the seat cushion is flat, so that it is not difficult to ride, and the same sitting comfort can be obtained no matter where you sit. Therefore, it is effective when the number of passengers is large.

[0004]

By the way, in the case of a five-seater passenger car, normally, the rear seat can seat up to three people. However, when three passengers sit on the bucket type rear seat, Since the user sits on the central portion of the raised seat cushion, the riding posture becomes unstable, and a good sitting comfort cannot be obtained. Further, since the central occupant is seated at a position higher than the seat surfaces of other occupants, the head of the central occupant is projected. For this reason, when the driver performs rearward confirmation with the rear-view mirror, the head of the occupant in the center is reflected in the rear-view mirror, which hinders rearward confirmation, which hinders driving.

On the other hand, in the flat type seat, since the central portion of the seat cushion is not raised, even if three passengers ride on the rear seat, there is no difficulty in riding and the seating position at the center is low, which hinders rearward confirmation. Not even. Therefore, when three passengers are seated on the rear seat, a flat type seat without a raised central portion is preferable.

However, in the flat type rear seat, when the number of seated occupants is small, for example, when only one or two people are seated in the rear seat, the flat type seat does not have a raised central portion, so that the holding property is low. The occupant's riding posture becomes unstable. It is therefore an object of the present invention to solve the above-mentioned problems in the rear seats of automobiles and provide a variable seat that can change its shape depending on the number of passengers.

[0007]

In order to achieve the above object, according to the present invention, in a seat having a seat cushion having a plurality of seating positions, a pad at a seating position sandwiched between two seating positions is provided on a lower surface of the pad. Equipped with a pad support that can be moved up and down and height adjusting means that adjusts the vertical height of the pad support, and the seat can be switched between a bucket shape and a flat shape according to the number of seated people. A variable seat that is characterized by

Further, it is preferable that the height adjusting means is a jack having a rotary shaft and a pantograph for vertically moving the pad support member in accordance with the rotation of the rotary shaft. Further, the height adjusting means has a rotating shaft having a worm gear, a worm wheel meshing with the worm gear, one end concentrically connected to a rotation center of the worm wheel, and the other end connected to the pad support body. It is preferable that the arm is provided with an arm.

Furthermore, it is preferable that the rotating shaft is driven by a motor. Furthermore, it is preferable that the height adjusting means is an air bag that expands and contracts.

[0010]

In the variable seat according to the present invention, the vertically movable pad support is disposed under the seated pad which is sandwiched between the two seating positions. By moving the pad support up and down, The sitting position is raised or flat.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, a variable seat 1 according to the present invention has a seat cushion 11 on which an occupant sits and a seat back 12 which serves as a backrest, and a variable mechanism is incorporated inside a center 11a of the seat cushion. There is.

As shown in FIG. 2, the variable mechanism includes a panel (pad support member) 14 disposed below the pad 13 in the seat cushion 11, and height adjusting means M1 for adjusting the height of the panel. Is equipped with. The panel 14 is a substantially square plate that supports the pad 13 at the center of the seat cushion 11, and has a size substantially equal to the size of the portion to be raised.

A pantograph type jack 15 is used as the height adjusting means M1 of the variable seat 1. As shown in FIG. 2, the pantograph-type jack 15 has an upper end plate 151.
The lower end plate 152 and the four frames 153 are assembled by a hinge into a substantially rhombic pantograph shape, and the female screw members 153a and 153b are arranged at the positions corresponding to each node of the upper and lower frames 153. A rotary shaft 154 having a male screw engraved between the female screw members is horizontally extended so as to connect the diagonal lines. The female screw members 153a and 153b and the rotary shaft 154 are screwed together.

In the jack 15, the lower end plate 152 is fixed to the floor surface F by the mounting plate 155, and the upper end plate 1
A panel 14 that supports the pad 13 of the seat cushion 11 is fixed to 51. Then, the end of the rotary shaft 154 of the jack projects from the front end surface 11b of the seat, and the knob 16 is attached thereto. The variable seat 1 is
As shown in FIGS. 2 and 3, by rotating the knob 16, the rotating shaft 154 for lifting and lowering rotates, and the female screw members 153 a and 15
3b approach each other. Along with that, the upper end plate 151 and the lower end plate 152 move in a direction of separating from each other. Then, since the jack 15 is extended in the vertical direction, the panel 14 provided on the upper end plate 151 of the jack moves upward. Therefore, the pad 13 is pushed upward together with the panel 14, and the central portion 11a of the seat cushion 11 is raised.

On the other hand, when the knob 16 is turned in the opposite direction, the female screw members 153a and 153b are separated from each other, and along with this, the upper end plate 151 and the lower end plate 152 approach each other, and the jack 15 is contracted in the vertical direction. Then, the panel 14 arranged on the upper end plate 151 of the jack moves downward. Therefore, the pad 13 moves downward together with the panel 14, and the central portion 11a of the seat cushion 11 becomes flat as shown in FIG.

As described above, the variable seat 1 is provided with the knob 16
By turning, it is possible to easily form a bucket type seat or a flat type seat. Next, a second embodiment of the present invention will be described with reference to the accompanying drawings. The variable seat 2 in the second embodiment is shown in FIG.
As shown in, the seat cushion 21 on which the occupant sits
And a seat back 22 serving as a backrest,
A variable mechanism is incorporated inside the center 21a of the seat cushion.

As shown in FIG. 5, the variable mechanism in the variable seat 2 includes a panel 24 that supports the pad 23 and is supported so as to be vertically movable, and height adjusting means M2 that drives the panel 24 in the vertical direction. have. The panel 24 is the first
The shape is the same as that of the panel 14 in the variable sheet of the embodiment. As shown in FIGS. 5 and 6, the height adjusting means M2 is provided with a rotary shaft 251 having a worm gear 251a in an intermediate portion and a rotary shaft 251 that is orthogonal to the rotary shaft 251, and both ends thereof are rotatable on a support plate (not shown). 252 pivotally supported by
(Two). Each rod 252 is provided with a quadrant worm wheel 252a meshing with the worm gear 251a and an arm 252b.

Both ends of the rotary shaft 251 are stretched over two mounting plates 253 and 253, and are mounted by a mounting jig 254 so as to be rotatable and immovable in the axial direction. One end of the rotary shaft 251 is provided with the seat cushion 2
The knob 26 projects from the front end face 21b of the No. 1 and is fixedly installed. By turning the knob 26, the worm gear 25
1a is designed to rotate.

The rod 252 has a worm wheel 252a and an arm 252b at predetermined positions. The worm wheel 252a is fixed so that its rotation center and the axis of the rod 252 are coaxial with each other.
It is cut out in a circle. The arm 252b is fixed so that one end of the arm 252b projects in a direction substantially opposite to the projecting direction of the quadrant worm wheel 252a with respect to the axis of the rod 252, and the other end of the arm 252b has a lower end surface of the panel 24. Is rotatably connected to a connecting piece 24a provided at a predetermined position. Here, the worm wheel 252a and the worm gear 251a are meshed so that the arms 252b of the respective rods 252 are parallel to each other.
Therefore, as the rod 252 rotates, the two arms 252b are rotated while maintaining the parallel state.
4 is driven in the vertical direction in parallel with the floor surface F.

The variable sheet 2 is, as shown in FIGS.
The worm gear 251a is rotated by turning the knob 26, and the two worm wheels 252a
a, 252a are driven, and these worm wheels 2
The two rods 252 and 252 rotate in conjunction with 52a. Then, the arm 252b arranged on each rod 252 is driven around the axis of the rod 252 in the arrow A direction. Along with this, the panel 24 connected to the tip of the arm 252b is pushed upward. Therefore, the pad 23 follows the movement of the panel 24.
Is also pushed up, and the central portion 21a of the seat cushion 21 rises.

On the other hand, when the knob 26 is turned in the opposite direction, the worm gear, the worm wheel, and the rod rotate in the opposite direction, the arm 252b is driven in the direction of arrow B, and the panel 24 is lowered downward accordingly. Therefore, the pad 23 also moves downward following the movement of the panel 24, and the central portion 21a of the seat cushion 21 becomes flat. As described above, the variable seat 2 can be rotated by turning the knob 26.
A bucket type sheet or a flat type sheet can be easily formed.

The height adjusting means M1 and M2 described above are
Although the occupant raises or flattens the central portion of the seat by turning the knob, an actuator such as a motor is incorporated in the height adjusting means to raise and lower the central portion of the seat electrically instead of manually. I don't mind. For example, in the case of the height adjusting means M1, on the rotating shaft 154 of the jack 15,
The motor can be connected via a speed reducer. In the case of the height adjusting means M2, a motor can be connected to the rotary shaft 251 via a speed reducer.

In addition to the height adjusting means M1 and M2 described above, an air bag capable of expanding and contracting can be used as the height adjusting means. That is, by arranging the air bag on the lower surface of the pad at the central portion of the seat cushion, the central portion of the seat cushion is moved up and down. Here, when the central portion of the seat cushion is raised, air is injected into the air bag by an air pump or the like to inflate the air bag and push up the pad. On the other hand, in the case of a flat state, the air in the air bag is removed to lower the raised central portion.

Further, the present invention is not limited to the rear seat and the seat for three persons, but can be applied to the front bench seat, the second and third seats of the one-box car. Further, it can be applied to a seat for a large number of people such as a seat at the end of a bus. In this case, it is preferable to provide a plurality of height adjusting means according to the number of people.

[0025]

According to the variable seat of the present invention, in a seat cushion having a plurality of seating positions, two seating positions are provided by a height adjusting means incorporated in a seating position pad sandwiched between the two seating positions. The seated position sandwiched between the positions can be raised or flattened, and the form of the seat can be appropriately selected from the bucket type and the flat type. Therefore, when the number of passengers is small, the bucket type seat can be used, and when the number of passengers is large, the flat type seat can be used. For example, in the case of a three-seat rear seat, when there are two occupants, the occupant can be held more easily by raising the central portion to form a bucket type seat. When the occupant has three passengers, the central portion can be improved. It is possible to improve the riding comfort in the central portion by flattening the seat to be a flat type seat, and lower the seating position of the passenger in the center to ensure the rear visibility.

Since the variable seat according to the second aspect uses the pantograph type jack as the height adjusting means, the height of the seating position is adjusted by rotating the rotary shaft, and the seat shape is arbitrarily changed. You can In the variable seat according to the third aspect, since the worm gear and the worm wheel are used as the height adjusting means, the height of the seating position can be adjusted by rotating the rotating shaft, and the seat shape can be arbitrarily changed. .

In the variable seat according to the present invention, since the rotary shaft of the height adjusting means is driven by the motor, the occupant does not have to rotate the rotary shaft, and the seat shape can be arbitrarily changed by electric control. You can In the variable seat according to the fifth aspect, since the air bag is used as the height adjusting means, the air bag is inflated,
By contracting, the sheet shape can be changed arbitrarily. In addition, a complicated mechanism for height adjustment can be omitted, which contributes to weight reduction of the vehicle.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a variable seat.

FIG. 2 is a schematic configuration diagram of a variable seat according to the first embodiment of the present invention.

FIG. 3 is a front view showing the outer appearance of a variable seat having a raised central portion.

FIG. 4 is a front view showing the outer appearance of a variable seat having a flat central portion.

FIG. 5 is a schematic configuration diagram of a variable seat according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing a configuration of height adjusting means according to a second embodiment of the present invention.

[Explanation of symbols]

 11 Seat Cushion 11a Central Part (of Seat Cushion) 13 Pad 14 Panel (Pat Support) 21 Seat Cushion 21a Central Part (of Seat Cushion) 23 Pat 24 Panel (Pat Support) M1 Height Adjusting Means M2 Height Adjusting Means

Claims (5)

[Claims] 1. A seat support having a seat cushion having a plurality of seating positions, the pad support being disposed on the lower surface of a seated seat put between two seating positions and movable up and down, and the pad support. A variable seat, comprising: height adjusting means for adjusting the height of the body in the vertical direction, and being capable of switching the seat between a bucket shape and a flat shape according to the number of seated persons. 2. The variable seat according to claim 1, wherein the height adjusting means is a jack having a rotary shaft and a pantograph for vertically moving the pad support member in accordance with rotation of the rotary shaft. 3. The height adjusting means includes a rotary shaft having a worm gear, a worm wheel meshing with the worm gear, one end concentrically connected to a rotation center of the worm wheel, and the other end connected to the pad support body. The variable seat according to claim 1, further comprising an arm connected to the variable seat. 4. The variable seat according to claim 2, wherein the rotating shaft is driven by a motor. 5. The variable seat according to claim 1, wherein the height adjusting means is an air bag that expands and contracts.