JPH0528100Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle seat provided in a vehicle such as an automobile.

[Background technology]

A vehicle seat is generally provided with a seat cushion for supporting the lower body of an occupant and a seat back for supporting the upper body of the occupant. In this general seat, the lower end of the seat back is pivotally supported on the seat cushion, and the seat cushion can be adjusted in the longitudinal and up-down directions of the vehicle, and the seat back can also be rotated relative to the seat cushion, which is what is called reclining. mechanism has been adopted.

However, in order to accommodate the physique of various passengers,
Preferably, the seat cushion and the seat bag are adjusted separately. In other words, by moving only the seat cushion in the vertical or longitudinal direction of the vehicle without moving the seat back, or by changing the height of only the seat cushion without changing the height of the seat back, the adjustment range can be widened. It becomes wider and can accommodate occupants of various physiques.

However, if the seat back and seat cushion of the current structure of the vehicle seat are made to be able to move separately relative to the vehicle, depending on the adjustment range, a gap may be created between the seat cushion and the seat back, which may cause problems for the occupant. Since the seat corresponds to the lower back of the passenger, it causes a poor riding comfort. Furthermore, during adjustment, the occupant's lower back moves relative to the seat bag or seat cushion, causing friction between the occupant's lower back and the seat, which impairs comfort.

The present invention takes the above facts into account, and aims to provide a vehicle seat that can maintain occupant comfort even in a vehicle seat in which the seat back and seat cushion are moved separately. be.

[Overview and operation of the device]

The present invention includes a pair of seat cushion frames that are attached to a vehicle in a position-adjustable manner; the seat cushion frames are spanned so as to be relatively movable along the longitudinal direction of the vehicle, and serve as a seating section for an occupant; , a seat cushion slide whose front end of the vehicle is bent while being accommodated and pulled out to change the substantial seating area when moving relative to the seat cushion frame; and a seat cushion slide which is height-adjustably attached to the vehicle. Seat back frame and
A seat back slide is provided over the seat back frame so as to be relatively movable along the vertical direction of the vehicle to serve as a back rest for the occupant, and a portion of the seat back slide is connected to the seat cushion slide. It is said that

For this reason, in this invention, the lower body of the occupant is supported by the seat cushion slide, and the upper body is supported by the seat back slide, and since these are connected to each other at a part of the body, there is no separation between the two, and the lumbar region of the occupant is supported. will not become unstable or cause friction with the occupant's waist. Adjustment in the longitudinal direction of the vehicle is performed by moving the seat cushion frame in the longitudinal direction of the vehicle relative to the vehicle body, and by moving the seat back frame in the longitudinal direction of the vehicle. This is done by rotating. Furthermore, since the seat cushion frame can move up and down relative to the vehicle body, the seat cushion slide also moves up and down relative to the vehicle, and the seat cushion slide moves in the longitudinal direction of the vehicle relative to the seat cushion frame. .

[Example of idea]

As shown in FIGS. 1 and 2, in the vehicle seat of the present invention, a seat cushion slide 12 and a seat back slide 14 are movably supported by a seat cushion frame 16 and a seat back frame 18, respectively.

To explain this in detail, the seat cushion slide 12 is a thick sheet made of a flexible material having a predetermined thickness, preferably a flexible synthetic resin, as shown in FIG. It is designed to form a surface.

The vehicle rear end of the seat cushion slide 12 is connected to the lower end of the seatback slide 14 by a connecting portion 20. Seat back slide 14 is preferably made of the same material as seat cushion slide 12, but unlike seat cushion slide 12, it does not need to be flexible. The seat cushion slide 12 and the seat back slide 14 may have a frame embedded therein to maintain their strength.

If the connecting portion 20 is configured to connect the seat cushion slide 12 and the seat back slide 14 so as to be relatively rotatable, it may use a rotating shaft or a so-called so-called device that can elastically deform the seat cushion slide 12 and the seat back slide 14. They may be connected by an integral hinge.

The seat cushion slide 12 has guide projections 22 and 24 protruding from its lower surface. The guide protrusions 22 and 24 have a substantially T-shape with an enlarged width at the tip thereof, and are guided by a guide rail 28. This guide rail 28 is a lifting plate 2 fixed to the seat cushion frame 16.
6 with screws 27. As shown in FIG. 2, the guide rail 28 has a J-shape with its longitudinal axis opening toward the rear of the vehicle.
The outer circumferential surface of the T
The grooves 30 are continuously formed.

Guide projections 22, 24 into these T-shaped grooves 30
is inserted and the seat cushion slide 12 and seat cushion frame 16 move relative to each other in the vehicle longitudinal direction (in the direction of arrow A), the guide rail 28 at the vehicle front end of the seat cushion slide 12
Since the length of the bent portion along the seat is changed, the effective area of the seating surface is changed.

To explain this in detail, when the seat cushion frame 16 moves toward the rear of the vehicle and the seat cushion slide 12 moves toward the front of the vehicle, the seat cushion slide 12 gradually bends from its front end along the guide rail 28. The seat cushion slide 12 is rolled up in the direction of arrow B, and the seating area of the seat cushion slide 12 along the straight portion of the guide rail 28 becomes smaller. Further, due to the opposite relative movement, the vehicle front end of the seat cushion slide 12 is gradually pulled out from the bent portion of the guide rail 28, so that the seating area can be increased.
Note that the guide protrusion 22 has a longer axial length than the guide protrusion 24 so that it can support a larger occupant load than the guide protrusion 24.

As shown in FIG. 1, the elevating plate 26 to which the guide rail 28 is attached has a pair of longitudinal elongated holes 32 near both ends, into which the rollers 36 of the support plate 34 are inserted.

A long hole 40 is formed in the elevating plate 26 in a direction perpendicular to the longitudinal direction of the long hole 32, into which a roller 44 attached to the tip of a drive arm 42 is inserted. This drive arm 42 is connected to the seat base 3
8 is fixed to the output shaft of a motor 46, and when the motor 46 rotates, the elevating plate 26 can be moved up and down in the direction of arrow C. This allows the motor 46 to move the seat cushion slide 12 up and down via the seat cushion frame 16, thereby changing the height of the seating surface for the occupant.

The support plate 34 has a rack bar 35 at its lower part.
is fixed, housed in the guide rail 80, and guided in the longitudinal direction of the vehicle (in the direction of arrow A). The guide rail 80 is fixed to the vehicle floor via the seat base 38. guide rail 80
A notch 81 is formed in the notch 81, into which the output shaft pinion 39 of the motor 37 attached to the seat base 38 enters and engages with the rack 35. Therefore, when the motor 37 rotates, the seat cushion frame 16 can move in the longitudinal direction of the vehicle (in the direction of arrow A). In this case, both the left and right seat cushion frames 16 of the seat cushion slide 12 move by the same amount.

The seat back slide 14 has ribs 48 shown in FIG. 2 projecting from both sides thereof, the longitudinal direction of which is parallel to the seating surface of the seat back slide 14. The rib 48 is accommodated in a guide groove 52 formed on the inner surface of the notch 50 of the seatback frame 18, thereby allowing the seatback slide 14 to move up and down relatively along the seatback frame 18. It's getting old.

The seatback frame 18 is formed into a gate shape with a notch 50, and a belt outlet 54 is formed at one of its upper ends, through which the occupant restraint is pulled out from a retractor housed inside the seatback frame 18. This is the passage area for the webbing.

The upper end of the notch 50 and the seatback slide 14
A bellows bag 55 is interposed between the upper end of the
It fills in the gaps. Since no large load is applied to this portion, the bellows bag 55 only needs to be deformed to accommodate changes in size between the two.

Seat back frame 1 as shown in FIG.
The rack bar 58 has one end fixed to the inside of the rack bar 8 with a pin 56, and its lower end portion is accommodated in the guide pipe 60 so that it can slide coaxially with the guide pipe 60. This guide pipe 60 is fixed to a rotating plate 62, and a pinion 66 is provided corresponding to a notch 64 formed in a portion thereof. This pinion 66 meshes with a rack 68 formed on the rack bar 58, and is secured to the output shaft of a motor 72, which is secured to the rotary plate 62 with a stepped bolt 70.

Therefore, when the motor 72 is driven, the pinion 66
The rack bar 58 is made to protrude or retract from the guide pipe 60 (in the direction of arrow D), thereby causing the seat back frame 18 to move relative to the seat back slide 14, thereby increasing the effective length of the passenger backrest. It is now possible to change.

The rotating plate 62 is the slide arm plate 7
It is fixed to the output shaft of a motor 76 fixed to the motor 4 and is pivotally supported to the slide arm plate 74,
When the motor 76 rotates, it rotates in the direction of arrow E and reclines the seat back frame 18.

The slide arm plate 74 is the slide bar 7
8, and this slide bar 78 can move in the longitudinal direction of the vehicle along a guide rail 80. That is, the guide rail 80
The front portion guides the rack bar 35 and the rear portion guides the slide bar 78 in the longitudinal direction of the vehicle.

A rack 84 is formed on the lower surface of the slide bar 78, and a pinion 88 driven by a motor 86 attached to the seat base 38 is engaged through a notch 90 formed in a portion of the guide rail 80. As a result, when the motor 86 is driven, the slide bar 78 moves toward the seat back frame 18.
can be moved in the longitudinal direction of the vehicle (in the direction of arrow A).

Although FIG. 1 only shows the drive structure on the right side of the occupant and omits the opposite side, similar parts are arranged symmetrically.

Next, the operation of this embodiment will be explained.

The lower body of the occupant sitting on this seat is supported by a seat cushion slide 12, and the back of the upper body is supported by a seat back slide 14.

When it is desired to move the seat cushion slide 12 up and down, the motor 46 is driven. As a result, the elevating plate 26 moves up and down with respect to the support plate 34 due to the rotation of the drive arm 42, and the seat cushion frame 16 moves upward and downward relative to the seat cushion slide 12.
It also moves up and down to change the height of the seating surface.

In this case, even if the seat cushion slide 12 shown in FIG. It is preferable to form the thin wall portion 14A in the vicinity. Furthermore, when the vertical movement of the seat cushion slide 12 is large, a load may be applied between the seat back slide 14 and the seat back frame 18, and between the rib 48 and the guide groove 52. The motors 72 and 76 may be allowed to freely rotate, or may be slightly moved by a necessary length to move the seat back slide 14 by a slight amount.

When the passenger changes the angle of the seat back slide 14 and the seat back frame 18, that is, when the passenger performs a reclining operation, the motor 76
As a result, the rotating plate 62 rotates the seat back slide 14 and the seat back frame 18 in the direction of arrow E around the axis of the motor 76.

Further, when moving the seatback slide 14 and the seatback frame 18 in the longitudinal direction of the vehicle, the motor 86 is driven. This motor 86 moves the rack 84 to the guide rail 8 via a pinion 88.
0 in the longitudinal direction of the vehicle, the slide arm plate 74 moves both the seatback slide 14 and the seatback frame 18 in the longitudinal direction of the vehicle. Since the seat cushion slide 12 is moved in the longitudinal direction of the vehicle by the seatback slide 14, it moves along the stationary guide rail 28, changing the bending length at its front end.

While keeping the seatback slide 14 stationary,
When changing the length of the seating surface, the motor 37 is driven to move the rack bar 35 in the front and back direction. As a result, the bent portion of the seat cushion slide 12 at the bent portion of the guide rail 28 is changed, and the effective length of the seating surface is changed.

When changing the height of the seat back frame 18, the motor 72 is driven. This allows pinion 66
extends the rack bar 58, and the seatback frame 18 is moved vertically relative to the seatback slide 14, thereby changing the effective length of the backrest. However, the seatback slide 14 and seat cushion slide 12 remain stationary.

In the above embodiment, the seat cushion frame 16 is configured to be able to simply move in the vertical direction and the front-back direction. It may be configured such that the inclination of the seat surface can be changed as the slide 12 moves up and down. In this case, the seat cushion slide 12
When the rear portion of the seat back slide 14 moves up and down, the seat back slide 14 also moves up and down.

[Effect of idea]

As explained above, the present invention includes a pair of seat cushion frames that are attached to a vehicle in a position-adjustable manner, and a seat cushion that extends between the seat cushion frames so as to be relatively movable along the longitudinal direction of the vehicle. and a seat cushion slide whose front end portion of the vehicle is bent while being accommodated and pulled out when moving relative to the seat cushion frame to change the substantial seating area;
a seat back frame attached to a vehicle in a height-adjustable manner; and a seat back frame that extends over the seat back frame so as to be movable relative to the seat back frame along the vertical direction of the vehicle to serve as a backrest for a passenger, and a portion of which serves as the seat cushion. Since the seat back slide is connected to the slide, it has an excellent effect of being able to accommodate the physical differences of the occupants without impeding the comfort of the occupants.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a driving portion showing an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing a state in which a seat bag and a seat cushion are attached. 12... Seat cushion slide, 14...
Seat back slide, 16... Seat cushion frame, 18... Seat back frame, 2
2... Guide protrusion, 24... Guide protrusion, 28... Guide rail, 30... T-shaped groove.

Claims (1)

[Scope of Claim for Utility Model Registration] A pair of seat cushion frames that are attached to a vehicle in a position-adjustable manner; and a seating portion for a passenger that extends between the seat cushion frames so as to be relatively movable along the longitudinal direction of the vehicle. and a seat cushion slide whose front end of the vehicle is bent while being accommodated and pulled out when moving relative to the seat cushion frame to change the actual seating area; and a seat cushion slide whose height is adjusted to the vehicle. a seatback frame that is movably attached to the seatback frame; and a seatback frame that is spanned over the seatback frame so as to be relatively movable along the vertical direction of the vehicle to serve as a backrest for the occupant, and a portion of which is connected to the seat cushion slide. A vehicle seat comprising: a seat back slide; and a seat back slide.