JPH08108781A - Mobile link type seat structure - Google Patents

Abstract

PURPOSE: To provide a mobile link type seat structure, by which the space for a baggage room can be ensured and the comfortability at the time of seating can be improved. CONSTITUTION: A link movable type seat structure where a seat cushion 4 is supported on a car floor 1 in such a manner as to be freely tilted forward through a link mechanism 3 comprises a lock mechanism 8 for fixing the link mechanism 3 at an arbitrary angle and an operating lever for releasing the lock mechanism 8 and operating forward tilting of the link mechanism.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a link movable seat structure. More specifically, the present invention relates to a link movable seat structure that is improved to improve comfort.

[0002]

2. Description of the Related Art An example of a seat structure in a vehicle such as an automobile is shown in FIGS. This link moving type seat structure is generally applied to a third row seat of an automobile, that is, a so-called third seat (actual open flat 4-435).
No. 31). That is, with respect to the vehicle floor, the seat cushion 01
Is supported so as to be able to lean forward through four links 014 on the front, rear, left and right, and a seat back 03 is mounted on the seat cushion 01 so as to be swingable back and forth via a reclining adjuster.

The reclining adjuster is constructed such that the lower arm 04 'is fixed to the seat cushion 01, the upper arm 04 is fixed to the seat back 03, and the upper arm 04 is rotated to the lower arm 04' while the lower arm 04 'is rotated. A lock mechanism 05 for fixing the gear 02 to the upper arm 04 and engaging the upper arm 04 with the gear 02 to adjust the tilt angle of the seat back 03 to a predetermined angle.
Is attached.

The lock mechanism 05 comprises a lock piece 06 that engages with the gear 02 and a V-shaped guide piece 07 that guides the movement of the lock piece 06. A central portion 07a of the V-shaped guide piece 07 is rotatably supported by the upper arm 04, and a spring 08 that urges the one end portion 07b thereof counterclockwise in the drawing.
Is engaged, and the other end 7c is connected to the first cable 09 which is pulled clockwise in the drawing. The first cable 09 is connected to an operation lever 010 provided on the top portion 03a of the seat back 03. The lock piece 06 is
A base end portion 06b thereof is rotatably supported by the upper arm 04, and a projection portion 06a provided on one end side thereof is fitted into an arcuate elongated hole provided on one end portion 07b of the V-shaped guide piece 07. It is crowded.

Therefore, due to the elastic pulling force of the spring 08,
In a state where the V-shaped guide piece 07 is biased counterclockwise in the figure around the center portion 07a, the V-shaped guide piece 0
The lock piece 06, which is engaged with the arcuate elongated hole of No. 7 via the protrusion 06a, is urged clockwise in the figure around the base end portion 06b, and one end portion of the lock piece 06 meshes with the gear 02, A lock state is achieved in which the tilt angle of the back 03 is held at a predetermined angle.

By operating the operating lever 010, the first cable 09 is pulled up, and the V-shaped guide piece 07 is moved to the central portion 07 against the elastic pulling force of the spring 08.
When it is rotated clockwise in the figure about a, the lock piece 06 engaged with the arcuate elongated hole of the V-shaped guide piece 07 via the projection 06a is centered on the base end portion 06b. As shown in the figure, one end portion of the seat back 03 is rotated counterclockwise in the drawing to be disengaged from the gear 02, the locked state is released, and the tilt angle of the seat back 03 can be arbitrarily adjusted.

Further, the lock release prevention plate 011 is
A base end 011a thereof is rotatably attached to the upper arm 04, and a tip end 011b is provided with a spring 013 for urging counterclockwise in the drawing, and a second cable 012 is connected thereto. Therefore, the lock release prevention plate 011
However, in the state of being urged counterclockwise in the drawing by the elastic pulling force of the spring 013, the tip portion 011b thereof does not abut the V-shaped guide piece 07, so the V-shaped guide piece 07 is free to move. It can rotate. On the other hand, the second cable 012 is
It is connected to the link 014 via a cable guide 015 provided on the vehicle floor.

Therefore, if the link 014 falls forward,
The second cable 012 is pulled, the unlocking prevention plate 011 is rotated clockwise in the figure against the elastic pulling force of the spring 013, and its tip end 011b abuts on the V-shaped guide piece 07. Therefore, the rotation of the V-shaped guide piece 07 is prevented. That is, when the link 014 is tilted forward, the lock release prevention plate 011 is inserted into the V-shaped guide piece 07.
Therefore, the first lever 9 cannot be pulled up by the operating lever 010, and thus the locked state is maintained. Incidentally, the link 014 is provided with a stopper (not shown) for preventing the link 014 from falling backward when it is in an upright state.

[0009]

In the link movable seat structure described above, the link 014 is tilted forward to lower the seat cushion 01 to the vehicle floor, and the seat back 0 is used.
By folding 3 forward, the back of seat back 03 can be used as a luggage compartment.

When the back of the seat back 03 is used as a luggage compartment, the unlocking prevention plate 011 prevents the V-shaped guide piece 07 from rotating by the second cable 012, so that the seat back 03 is erected. Therefore, it is possible to prevent an erroneous use method in which an occupant sits on the seat cushion 01 that has fallen to the vehicle floor. However,
In the conventional link movable seat structure, it is not possible to adjust the seat cushion 01 in the front-rear direction according to the physique of the occupant when the seat is seated.

Therefore, in the conventional link movable seat structure, although the space of the luggage compartment can be secured, it does not contribute to the improvement of habitability. The present invention has been made in view of the above prior art, and an object of the present invention is to provide a link movable seat structure that not only secures a space in the luggage compartment but also improves habitability when sitting.

[0012]

The structure of the present invention that achieves such an object is a link movable seat structure in which a seat cushion is supported so as to be able to tilt forward with respect to a vehicle floor through a link mechanism. It is characterized in that a lock mechanism for fixing the lock mechanism at an arbitrary angle and an operation lever for releasing the lock mechanism and operating the forward movement of the link mechanism are provided. Further, a stopper mechanism is provided for restricting forward tilting of the link mechanism at a certain angle or more when the seat back is not folded on the seat cushion.

Further, the operation levers are arranged at the rear portion and the front portion of the seat cushion, and when the seat back is folded on the seat cushion, the operation levers arranged at the front portion of the seat cushion are operated. It is characterized in that a cancel mechanism is provided for canceling the link mechanism so that the link mechanism cannot tilt forward.

[0014]

[Function] Since the lock mechanism for fixing the link mechanism at an arbitrary angle is provided, the seat cushion can be adjusted back and forth according to the physique of the occupant, and if the lock mechanism is released, the front of the link mechanism can be adjusted. By falling, the seat cushion can be lowered to the vehicle floor. Further, when the seat back is not folded into the seat cushion, that is, when the seat back is in the upright state, the front and rear adjustment of the seat cushion is possible.
Since the forward tilt of the link mechanism beyond a certain angle is restricted,
The seat cushion does not descend. Further, when the seat back is folded, the stopper mechanism does not function, but the cancel mechanism cancels the operation by the operation lever arranged in the front portion of the seat cushion, and the lock mechanism cannot be released.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings. One embodiment of the present invention is shown in FIGS. This embodiment is applied to a third seat of an automobile. That is, as shown in FIGS. 1 and 6, two left and right bases 2 are fixed to the vehicle floor 1 and each base 2
A seat cushion 4 is supported forward and backward via a link 3 so as to be able to tilt forward. That is, the seat cushion 4 is supported so as to be able to tilt forward through a total of four links 3.

Seat backs 6a and 6b are attached to the seat cushion 4 via left and right independent reclining adjusters 5a and 5b, respectively. The seat backs 6a and 6b have perforated headrests. 7a and 7b are attached. The seat backs 6a and 6b can be tilted at arbitrary angles by the reclining adjusters 5a and 5b, and can also be folded forward by operating an operation lever (not shown).

Further, in this embodiment, the rear link 3 is
A lock mechanism 8 shown in FIG. 3 is provided. The lock mechanism 8 enables the seat cushion 4 to be adjusted in the front-rear direction by fixing the link 3 at an arbitrary angle, and has a configuration shown in FIGS. 4 and 7 to 13.

That is, the sector gears 9 are provided on the left and right bases 2.
Are integrally fixed by rivets 10a and 10b, and a shaft 11 penetrates through the center of the rivet 10a and 10b so that the shaft 11 can rotate in the horizontal direction. ing. The link 3 is arranged inside the base 2 and the sector gear 9, and the plate 14 is arranged outside thereof. A spiral spring 12 is attached to the outer end of the shaft 11 on the left side in FIG. 4, and one end of the spiral spring 12 is engaged with a hook 13 protruding from the base 2.

Therefore, the elastic rotational force of the spiral spring 12 causes the link 3 and the plate 14 to be constantly urged clockwise around the shaft 11 in FIG. On the other hand, at the upper end of the plate 14,
A lever 15 and a cam 16 are arranged between the link 3, and a pin 17 penetrates the plate 14, the lever 15, the cam 16 and the link 3. The lever 15 and the cam 16 are rotatably supported integrally with each other about a pin 17, and a spring 1 is provided between a hook 15a provided on the lever 15 and a hook 14a provided on the plate 14.
8 is interposed.

The lever 15 has a first cable 19
A hook 15b that engages with the tip end portion 19a of the first cable 19 is provided on the plate 14 while a hook portion 15b of the first cable 19 is provided on the plate 14.
Is provided with a hook 14b to be engaged with. The first cable 19 is connected to an operation lever that operates the lock mechanism 8. Therefore, due to the elastic force of the spring 18,
The lever 15 and the cam 16 are always urged counterclockwise in FIG. 3 against the plate 14 and the link 3, but the first cable 19 is pulled against the elastic force of the spring 18. As a result, the lever 15 and the cam 16 rotate in the clockwise direction in FIG. 3 with respect to the plate 14 and the link 3.

Further, a lock gear 20 capable of meshing with the sector gear 9 is arranged between the plate 14 and the link 3, and a pin 21 penetrates the plate 14, the lock gear 20 and the link 3. Lock gear 20
3 is pressed clockwise by the cam 16 which is constantly urged counterclockwise in FIG. 3 by the elastic force of the spring 18 to engage with the sector gear 9. When the lock gear 20 and the sector gear 9 are in mesh with each other, the link 3 and the plate 14 cannot rotate about the shaft 11, and the seat cushion 4 is held in the front-rear position.

Further, the pin 2 protruding from the lock gear 20
0a is loosely fitted in a long hole 15c formed in the lever 15. Therefore, the lever 15 rotates clockwise in FIG. 3 against the elastic force of the spring 18, and the pin 20 a of the lock gear 20 moves along the elongated hole 15 c of the lever 15, whereby the lock gear 20 However, it rotates in the counterclockwise direction in the figure and disengages from the sector gear 9. When the lock gear 20 is disengaged from the sector gear 9, the locked state is released, and the link 3 and the plate 14 are connected to the shaft 11
It is possible to adjust the front-back position of the seat cushion 4 by rotating the seat cushion 4 around the center.

As described above, the lock mechanism 8 includes the spring 1
The cam 16 that is constantly urged by
When 0 and the sector gear 9 mesh with each other, the front and rear positions of the seat cushion 4 are held in a locked state, and the lock gear 20 is disengaged from the sector gear 9 by operating the first cable 19. It can be released and the seat cushion 4 can be adjusted in the front-rear direction.

However, when the occupant is seated on the seat cushion 4 and the lock state is inadvertently released, the occupant may pinch his / her foot or the like between the second seat and the third seat due to the forward tilting of the link 3. There is. Therefore, when the seat backs 6a and 6b are not folded, that is, when the seat backs 6a and 6b are in the upright state, the stopper mechanism 22 that restricts the forward leaning of the link 8 beyond a certain angle is provided.

The stopper mechanism 22 is provided on the front link 3
The pin 23 is horizontally slidably attached to the base 2 at the position immediately before, and the link 24 that is coupled to the pin 23 through the elongated hole is rotatably provided in the horizontal plane. Is engaged with the tip end portion 25a of the second cable 25, and the stopper portion 25b of the second cable 25 is attached to the base 2. Here, the second cable 25 corresponds to the seat backs 6a and 6b described above.
It is operated by the operation of folding.

Therefore, when the seat backs 6a and 6b are in an upright position, the pin 23 projects right before the link 3, so that the rotation of the link 3 is restricted and the seat backs 6a and 6b move forward. The second cable 25 is operated by the folding operation, the pin 23 retracts from the front of the link 3, and the link 3 can be tilted forward. As described above, in the present embodiment, the solid lines are shown in FIG. 17 unless the seat backs 6a and 6b are in the folded state, that is, the seat cushion 4 cannot be seated. Since the link 3 cannot be tilted forward as shown by, the foot or the like is not caught by mistake.

Further, as shown in FIG. 16, the range in which the seat cushion 4 can be adjusted back and forth by the stopper mechanism 22 is about 80 mm, and a substantially constant height is secured in this range. Further, in this embodiment, FIG. 2, FIG.
4, as shown in FIG. 15, operation levers for operating the first cable 19 are provided in front of and behind the seat cushion 4.

That is, as shown in FIG. 5, inside the seat cushion 4, the third seat frame 2 is provided before and after the seat cushion 4.
6 and 27 are arranged and the third seat frame 2
The plate 28 bridging them in the center of 6,27
Is arranged. At the front end of the plate 28, a shaft 29 penetrates horizontally and is fixed by an E-ring 30, and a front lever 31 is swingably attached to the shaft 29. The front lever 31 is counterclockwise in FIG. A spring 32 that urges around is attached.

A link 33 is mounted on the shaft 29 so as to be slidable and swingable in the horizontal direction. Further, a spring 34 for urging the link 33 in the counterclockwise direction in FIG. A spring 35 for urging 33 toward the front right side in FIG. 5 is attached. A tip portion 19c of the first cable 19 is coupled to the link 33 via a clip rod 36, and a stop portion 19d of the first cable 19 is provided on the plate 28. Link 33
5 includes a convex portion 33a which can be vertically engaged with the front lever 31 while being biased by the spring 35 to the front right side in FIG.
Are formed. When the link 33 is slid along the shaft 29 in the left rear part in FIG. 5 against the elastic force of the spring 35, the engagement between the front lever 31 and the protrusion 33a of the link 33 is released. .

Therefore, with the front lever 31 and the convex portion 33a of the link 33 engaged, the front lever 31 is rotated clockwise in FIG. Is rotated in the same direction, the first cable 19 is pulled, and as described above, the lock gear 20
The lock state can be released by disengaging the seat cushion 4 from the sector gear 9, and the seat cushion 4 can be adjusted in the front-rear direction. On the other hand, at the rear end of the plate 28, the shaft 3
7 is horizontally passed through and fixed by an E ring 38, a rear lever 39 is swingably mounted on the shaft 38, and a spring 40 for urging the rear lever 39 clockwise in FIG. 15 is attached. ing.

The rear lever 39 is provided with a long hole, and the rear end of the rod 43 is connected to the long hole through the clip rod 41 and the washer 42, and the tip of the rod 43 is connected through the clip rod 44 to the link 33. Are bound to. Therefore, when the rear lever 39 is rotated counterclockwise in FIG. 15 against the elastic force of the spring 40 and the link 33 is rotated clockwise in FIG. 14 via the rod 43, the first cable As described above, the locked state can be released by pulling 19 and disengaging the lock gear 20 from the sector gear 9, and the seat cushion 4 can be adjusted in the front-rear direction.

As described above, in this embodiment, the locked state is released by operating either the front lever 31 or the rear lever 39 provided at the front and rear of the seat cushion 4 to pull the first cable 19. It is possible. However, when the seat backs 6a and 6b are folded,
Since the restriction by the stopper mechanism 22 is released, when the front lever 31 is operated, the link 3 may tilt forward and the occupant may get his / her foot caught between the second seat and the third seat. That is, when the seat backs 6a and 6b are folded, it is necessary to tilt the link 3 forward by operating only the rear lever 39.

Therefore, when the seat backs 6a and 6b are folded, a cancel mechanism 45 is provided for canceling the operation of the front lever 31 to prevent the link mechanism from tilting forward. That is, as shown in FIG. 5, the link 46 is provided at the front end of the plate 28 with the rivet 4
A spring 48 for rotatably supporting the link 46 in the horizontal plane and for urging the link 46 clockwise in the drawing is attached. The tip portion 50a of the third cable 50 is coupled to the link 46 with a screw 49, and the stop portion 50b of the third cable 50 is provided on the plate 28.
The third cable 50 is used for the seat back 6 as described above.
It is operated when a and 6b are folded forward.

Further, the upper end of a rod 52 is connected to the link 46 via a clip rod 51, and the rod 5
The lower end of 2 is connected to the link 33. Therefore, when the seat backs 6a and 6b are folded, the third cable 50
Is pulled, the link 46 rotates counterclockwise in the figure against the elastic force of the spring 48, the link 33 is pulled by the lot 52, and slides along the shaft 29 to the left rear part in FIG. The engagement between the front lever 31 and the convex portion 33a of the link 33 is released. Therefore, seat back 6
In the state in which a and 6b are folded, the link 33 does not rotate even if the front lever 31 is operated, so the first cable 1
9 is not pulled and the locked state is not released.

In other words, when the seat backs 6a, 6b are upright and the occupant can sit, the front lever 3
1 or the rear lever 39 is used to operate the first cable 19 to release the locked state, and the seat position can be adjusted back and forth, but in the state where the seat backs 6a and 6b are folded,
The link 3 can be tilted forward by operating the first cable 19 only by the rear lever 39 to release the locked state. Incidentally, in the above embodiment, the invention is applied to the third seat of the automobile, but the present invention is not limited to this,
It can also be applied to other sheets.

[0036]

As described above in detail based on the embodiments, according to the present invention, the lock mechanism for fixing the link mechanism for supporting the seat cushion so that it can be tilted forward at an arbitrary angle, and the lock mechanism. Since it has an operating lever that unlocks the mechanism and operates the link mechanism to move it forward, not only can the space in the luggage compartment be secured, but also it is possible to adjust the front-rear direction and improve the comfort when sitting. . Further, when the seat back is in the upright state, since the stopper mechanism for restricting the forward tilting of the link mechanism by a certain angle or more is provided, the link mechanism does not tilt forward, and further, when the seat back is folded, Since the link 3 is tilted forward by operating only the rear lever, the lock mechanism is not accidentally released.

[Brief description of drawings]

FIG. 1 is a side view of a link movable seat structure according to an embodiment of the present invention.

FIG. 2 is a plan view of a link movable seat structure according to an embodiment of the present invention.

FIG. 3 is a structural diagram of a lock mechanism.

FIG. 4 is a sectional view taken along line AA in FIG.

FIG. 5 is a structural diagram of a front lever, a rear lever, and a cancel mechanism.

FIG. 6 is an external perspective view of a link movable seat structure according to an embodiment of the present invention.

FIG. 7 is a view in the direction of the arrow D in FIG.

8 is a cross-sectional view taken along the line GG in FIG.

FIG. 9 is a side view of the base.

FIG. 10 is a view on arrow E in FIG.

11 is a cross-sectional view taken along the line CC in FIG.

FIG. 12 is a bottom view of the base.

13 is a sectional view taken along line BB in FIG.

14 is a cross-sectional view taken along line HH in FIG.

15 is a cross-sectional view taken along line I-I in FIG.

FIG. 16 is an explanatory diagram of front-back adjustment of the link movable seat structure according to the embodiment of the present invention.

FIG. 17 is an explanatory diagram of a frontward tilted state and a folded state of the link movable seat structure according to the embodiment of the present invention.

FIG. 18 is an explanatory diagram of a conventional link movable seat structure.

FIG. 19 is an explanatory diagram of a main part of a conventional link movable seat structure.

[Explanation of symbols]

 1 Vehicle Floor 2 Base 3, 24, 33, 46 Link 4 Seat Cushion 5a, 5b Reclining Adjuster 6a, 6b Seat Back 7a, 7b Headrest 8 Lock Mechanism 9 Sector Gear 10a, 10b, 47 Rivet 11, 29, 37 Shaft 12 Spiral Spring 13 Hook 14 Plate 15 Lever 16 Cam 17, 21, 23 Pins 18, 32, 34, 35, 40, 48 Spring 19 First cable 20 Lock gear 22 Stopper mechanism 25 Second cable 26, 27 Third seat frame 28 Plate 30, 38 E-ring 31 Front lever 36, 41, 44, 51 Clip rod 39 Rear lever 42 Washer 43, 52 Rod 45 Cancel mechanism 49 Screw 50 Third cable

Claims (4)

[Claims] 1. A link movable seat structure in which a seat cushion is supported so as to be able to tilt forward with respect to a vehicle floor via a link mechanism, and a lock mechanism for fixing the link mechanism at an arbitrary angle and a lock mechanism for releasing the lock mechanism. A link moving type seat structure, characterized in that an operating lever for operating the forward movement of the link mechanism is provided. 2. The link movable seat according to claim 1, further comprising a stopper mechanism for restricting forward tilting of the link mechanism beyond a certain angle when the seat back is not folded on the seat cushion. Construction. 3. The link movable seat structure according to claim 1, wherein the operation levers are arranged at a rear portion and a front portion of the seat cushion. 4. A cancel mechanism for canceling an operation by the operation lever arranged at a front portion of the seat cushion to prevent the link mechanism from tilting forward when the seat back is folded on the seat cushion. The link movable seat structure according to claim 3, wherein