JPH0525321Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a seat device for an automobile that can form a fully flat seat with the seat cushion and seat back by folding the seat back backwards.

(Prior Art) As a seat device that can create a fully flat seat with a seat cushion and a seat back by tilting the seat back backward, for example, there is known a seat device shown in Japanese Utility Model Application Publication No. 157836/1983. There is. In this publication, the backrest of the front seat is tilted backwards, and the front end side of the seat of the rear seat, which the tip of the backrest contacts, is separated from the seat body along the width direction and is free to rotate forward and downward. A fully flat seat is disclosed in which the front end of the backrest of the front seat that is folded rearward enters the front end side position of the seat portion of the rear seat.

(Problems to be Solved by the Invention) In such a fully flat seat, the seat cushion is arranged so as to be inclined toward the rear in order to improve the seating stability of the occupant. For this reason, even if the seat back can be folded down to a substantially horizontal position, there will be a step (a depression) between the seat cushion and the seat back, making it impossible to fully flatten the seat in the true sense of the word. I can't do it.

As a seat device that enables a fully flat seat, there is a seat device disclosed in Japanese Utility Model Application No. 37442/1983.
In this seat device, when the seat bag is tilted rearward, a member attached to the seat bag rotates upward to lift the rear part of the seat cushion, thereby making it possible to create a fully flat seat. The seat device of Japanese Utility Model Application Publication No. 60-37442 is further provided with a holding device for holding the seat cushion in a fixed position to prevent it from being accidentally lifted. This holding device is
It consists of a striker that has a hook that engages and disengages from a U-shaped hanger attached to the seat cushion, and a wire that pulls the striker. When the back seat is folded down, the wire pulls on the striker, causing the hook to disengage from the hanger and allowing the seat cushion to be lifted.

However, the seat device of Utility Model Application Publication No. 60-37442 does not have a mechanism in which the operation of folding the back seat backwards is linked to the operation of pulling the wire. The tensioning operation must be performed independently, which is inconvenient in operation.

This idea was devised in view of the above-mentioned circumstances, and its purpose was to allow the seat back and seat cushion to move together without forcing the driver to perform troublesome operations when folding the seat back backwards to make it fully flat. To provide an automobile seat device with a simple mechanism capable of constructing a substantially flat fully flat seat without creating a step between the seats.

(Means for Solving the Problems) In order to solve the above-mentioned problems and achieve the purpose, the automobile seat device according to this invention has the following features:
A seat cushion rotatably supported on the base 24, and a second seat cushion provided at the rear end of the seat cushion.
a seat bag rotatably mounted on a rotation shaft 36; an engaging member 56 provided at an end of the seat cushion on the seat cushion side; an engaged member 60 fixed to the seat cushion so as to move to a position where it engages with the mating member, and to be in a position separated from the engaging member when the seat back is in a normal state; , a lock position for locking the seat cushion so that it cannot rotate with respect to the base when the seat cushion is in a lowered position in a normal state; a locking mechanism 52, 48, 46 having a release position that allows the seat cushion to rotate about the first axis with respect to the base; and a locking mechanism provided coupled to the engaging member and the locking mechanism. a link member 58 that transmits fluctuations in the rotational position of the engaging member to the lock mechanism;
a link member 58 that places the lock mechanism in the lock position or the release position as the engaging member rotates, and as the seat bag is folded down from the normal state, the engaging member and the engaged The link member moves the locking mechanism to the release position and causes the locking mechanism to release the lock of the seat cushion until the engaging member and the engaged member come into contact with each other. After making contact, the engaging member moves the engaged member to rotate the seat cushion, and the link member connected to the engaging member moves the locking mechanism to the released position or later, thereby releasing the locking mechanism. It is characterized by maintaining the state.

(Function) In the seat device configured as described above, since the engaging member and the engaged member are separated from each other, the seat cushion is maintained in the normal state even if the back seat is tilted back. When the back seat is gradually folded down from its normal state, the link member is moved in conjunction with the movement of the engaging member provided on the back seat, and this link member moves the lock mechanism toward the release position. When the back seat is further folded down and the engaging member moves to a position where it comes into contact with the engaged member that lifts the rear part of the seat cushion, the locking mechanism reaches the release position and the lock is released. be done. When the back seat is further folded down, the engaging member pushes up the engaged member into a so-called fully flat state.

(Embodiment) Below, the configuration of an embodiment of an automobile seat device related to this invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the seat device 10 for the front passenger seat of an automobile includes a seat cushion 16 that is slidably attached to the front floor pan 12 of the automobile in the front-rear direction via a slide mechanism 14. , and a seat back 18 rotatably pivotally attached to the rear of the seat cushion 16. As shown in FIG. 1, a seat cushion frame 20 and a seat back frame 22 are housed inside the seat cushion 16 and the seat back 18, respectively, and constitute a solid framework of the seat cushion 16 and the seat back 18. ing.

As shown in FIG. 1, the slide mechanism 14 slides on a pair of seat slide under rails 24 fixed on the front floor pan 12 in a state extending in the front-rear direction, and on each seat slide under rail 24. The seat slide upper rail 26 is fixed to the seat slide upper rail 26 that can be attached to the seat slide under rail 26, and the seat slide upper rail 26 is normally fixed to the seat slide under rail 24, and the seat slide upper rail 26 is fixed to the seat slide under rail 26 by the seated person's unlocking action. A locking mechanism 28 that is slidable on the rail 24 is provided. This locking mechanism 28 is configured to be unlocked not only by the above-mentioned unlocking operation of the seated person but also by the depressing operation of a walk-in pedal, which will be described later.

The rear portion of the seat cushion 16 is located lower than the front portion, and is arranged so as to be inclined downward toward the rear so as to increase the seating stability of the seated person.

The seat cushion frame 20 described above is provided with both side frame portions thereof placed on both seat slide upper rails 26. A pivot plate 30 is attached to the front end of each seat slide upper rail 26, and both front end portions of the seat cushion frame 20 are rotated via pivot pins 32 at the upper ends of both pivot plates 30. It is pivoted as possible. On the other hand, an anchor plate 34 is attached to the rear end of each seat slide upper rail 26, and both anchor plates 34
Lower end portions on both sides of the seat back frame 22 are rotatably attached to the upper end via pivot pins 36.

The seatback frame 22 is always subjected to a rotational biasing force such that it falls forward by a reclining spring 38, and is normally tilted at an arbitrary angle with respect to the seat cushion frame 20 by a locking mechanism (not shown). is locked. A reclining lever 40 that extends forward is attached to the reclining spring 38. By lifting this reclining lever 40, the lock mechanism for the seatback frame 22 is unlocked, and the seatback frame 22 is unlocked.
is rotatable.

Note that a walk-in pedal 42 is attached to the left rear end of the seat device 10. By depressing this walk-in pedal 42, the lock mechanism for the seatback frame 22 and the lock mechanism 28 for the slide mechanism 14 are both unlocked. When the former lock is released, the seatback frame 22 is rotated so as to fall forward due to the biasing force of the reclining spring 38, and when the latter lock is released, the seat back frame 22 is rotated so as to fall forward, and when the latter lock is released, the seat back frame 22 is rotated so as to fall forward. , the seat cushion frame 20 will be slid forward.

As shown in FIGS. 3 to 6, a fixing mechanism 44 that releasably fixes between the seat cushion frame 20 and the anchor plate 34 is provided at the rear of both seat slide upper rails 26. .

That is, as shown in FIG. 4, the seat cushion frame 20 is connected to the seat slide upper rail 2.
6, the seat cushion frame 22 and the anchor plate 34 have through holes 46, 4 aligned with each other in their opposing parts.
8 are formed respectively. This fixing mechanism 44
These include a housing 50 fixed on the seat slide upper rail 26, a lock pin 52 slidably disposed within the housing 50 with one end protruding outward, and the lock pin 52.
It is provided with a coil spring 54 that urges it to protrude outward.

This lock pin 52 normally has one end protruded from the housing 50 by the biasing force of a coil spring 54. In this protruding state, one end of the lock pin 52 is attached to the seat cushion frame 20.
and are inserted into through holes 46 and 48 of the anchor plate 34. In this way, the seat cushion frame 20 is
is fixed to the seat slide upper rail 26 via an anchor plate 34.

On the other hand, the fixing mechanism 44 includes an engaging member 56 fixed to the lower surface of the lower frame portion of the seat back frame 22. As shown in FIG. 5, this engaging member 56 has both ends connected to the seat back frame 2.
2, and the central portion is formed so as to pass under the rear side frame portion of the seat cushion frame 20 and extend into the seat cushion frame 20. A pair of wires 58 are stretched, with one end fixed (crimped) to both sides of the engaging member 56 and the other end fixed to the inner ends of both lock pins 52.

Note that each wire 58 is connected to the seat back frame 2.
By falling down from the upright position, the lock pin 52 is pulled inward against the biasing force of the coil spring 54. However, within the range in which each wire 58 rotates from the upright position of the seat cushion frame 22 to the collapsed position by a predetermined angle (for example, about 13 degrees), the tip of the locking pin 52 connects to the through hole 44 of the seat cushion frame 20.
The tip of the lock pin 52 is inserted into the hole 46 and is configured such that when the lock pin 52 is bent over a predetermined angle, the tip of the lock pin 52 comes out of the through hole 46, as shown in FIG.

In this way, the seat bag 18 falls down from the upright position by a predetermined angle or more, and the lock pin 52 comes off, causing the seat cushion frame 2
0 is allowed to rotate around the pivot pin 32, that is, to rotate around the front end of the seat cushion 16.

On the other hand, an engaged member 60 that can be engaged with the engaging member 56 of the fixing mechanism 44 is fixed to the inside of the rear frame portion of the seat cushion frame 20. This engaged member 60 is configured so that when the seat back frame 22 is in a state where it is reclined by the above-mentioned predetermined angle or more from the upright position, the engaging member 56 fixed to the seat back frame 22 engages with this engaged member 60 and lifts it upward.
The engaged member 60 is configured so that the rear portion of the seat cushion frame 20 is raised by the engaging member 56 around the pivot pin 32 so that the seat cushion frame 20 is also approximately horizontal when the seat cushion frame 20 is in a substantially horizontal position.

The operation of the seat device 10 configured as described above will be explained below.

In a normal state, the rear part of the seat cushion frame 20 is connected to the locking pin 52 of the fixing mechanism 44.
is fixed by being inserted through the through hole 46 of the seat cushion frame 20 and the through hole 48 of the anchor plate 34. Therefore, the seat cushion frame 20 is placed and fixed on the seat slide upper rail 26.

In this way, by releasing the lock by the lock mechanism 28, the seated person can slide the seat slide upper rail 26 relative to the seat slide under rail 24, and slide the seat cushion 16 along the front-rear direction. You will be able to do so. In addition, by pulling up the reclining lever 40, the seat cushion frame 20 of the seat back frame 22 can be
The lock against the seat cushion 16 is released, and the seat bag 18 becomes freely rotatable relative to the seat cushion 16.
In this way, the seated person can sit on the seat device 10 in an optimal posture according to his/her physique.

On the other hand, when folding the seat back 18 to create a fully flat seat, first unlock the locking mechanism 28, slide the seat cushion 16 to the frontmost position, and then pull the reclining lever 40 upward to release the seat cushion 18. Release the lock on section 16. After that, when the seat bag 18 is pushed backward, the lock pin 52 of the fixing mechanism 44 locks the seat cushion frame 20 and the anchor plate 3
, and the fixing mechanism 44 to the anchor plate 34 at the rear of the seat cushion frame 20, that is, the seat slide upper rail 26, is released. In this way, the seat cushion frame 20 can be rotated at the front end via the pivot pin 32, in other words, the rear part of the seat cushion 16 can be lifted.

After the fixing by this fixing mechanism 44 is released,
When the seat bag 18 is further pushed backward, the engaging member 56 of the seat bag frame 22 comes into contact with the engaged portion 60 of the seat cushion frame 20, and as the seat bag frame 22 rotates, the seat cushion The frame 20 is attached to the pivot pin 32
It will rotate counterclockwise in the figure. In this way, the rear part of the seat cushion 16 is lifted as the seat bag 18 falls backward.

Therefore, according to the seat device 10 of this embodiment, when the seat bag 18 is pushed down to a substantially horizontal position, the seat cushion 16 is also brought to the substantially horizontal position, and the seat bag 18 and the seat cushion 16 are It is made substantially flush. In this way, with this seat device 10, when the seat back 18 is folded backward to create a fully flat seat, as shown in FIG. 7, there is no step at the rear of the seat cushion 16.
A fully flat seat in the true sense of the word will be realized.

This invention is not limited to the configuration of the one embodiment described above, and can be modified in various ways without departing from the gist of this invention.

For example, in the above-described embodiment, the seat device 10 is described as being for a front passenger seat, but it goes without saying that it can be applied to a driver's seat or a second seat in a one-box car.

(Effects of the invention) As detailed above, according to the automobile seat device according to the invention, since the engaging member is spaced apart from the engaged member, the seat cushion cannot be moved unless the back seat is tilted over a predetermined angle. The system remains in its normal state. The driver simply moves the back seat backwards, and when the back seat is tilted over a predetermined angle, the seat cushion is unlocked without any further intervention from the driver. It becomes possible to lift the seat cushion. Such continuous operation causes the engaging member and the engaged member to move apart from each other,
This is achieved by a simple mechanism consisting of an engaging member and a link member connected to a locking mechanism.

That is, it has been possible to provide a seat device that can realize a fully flat state with a simple mechanism and without placing any burden on the driver.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the structure of an embodiment of the automobile seat device according to the invention in terms of a frame structure; FIG. 2 is a side view schematically showing the structure of the seat device;
Fig. 3 is a partial perspective view showing the main parts taken out and enlarged to show the fixing mechanism; Fig. 4 is a side sectional view showing the structure of the fixing mechanism; Fig. 5 is a perspective view showing the structure of the engaging member. FIG. 6 is a partial cross-sectional view showing the state in which the fixing mechanism is released; and FIG. 7 is a side view schematically showing the state in which the seat is made into a fully flat sheet. In the figure, 10... Seat device, 12... Front floor pan, 14... Slide mechanism, 16... Seat cushion, 18... Seat back, 20...
... Seat cushion frame, 22 ... Seat back frame, 24 ... Seat slide under rail, 26 ... Seat slide upper rail, 28 ... Lock mechanism, 30 ... Pivot plate, 32 ... Pivot pin, 34...Anchor plate, 36...Pivot pin, 38...Spring for reclining, 40...Lever for reclining, 42...Pedal for walk-in, 44...Fixing mechanism, 46, 48...Through hole, 50 ... Housing, 52 ... Lock pin, 54 ... Coil spring, 56 ... Engagement member, 58 ... Wire, 60
...It is an engaged member.

Claims (1)

[Claims for Utility Model Registration] 1. A seat cushion rotatably supported with respect to the base 24 on a first rotating shaft 32 provided at the front end; and a seat cushion provided at the rear end of the seat cushion. a seat bag rotatably mounted on a second rotation shaft 36 that is rotated; an engaging member 56 provided at an end of the seat bag on the seat cushion side; an engaged member fixed to the seat cushion so as to move to a position where it engages with the engaging member when the seat back is in a normal state, and to be in a position separated from the engaging member when the seat bag is in a normal state; Joining member 60
and a lock position for locking the seat cushion so that it cannot rotate with respect to the base when the seat cushion is in a position where its rear is lowered in a normal state, and a lock position where the seat cushion is in a state where the seat back is rotated rearward. a locking mechanism 52, 48, 46 having a release position that allows the seat cushion to rotate about the first axis relative to the base; and a locking mechanism 52, 48, 46 coupled to the engaging member and the locking mechanism. A link member 58 is provided, which transmits changes in the rotational position of the engagement member to the lock mechanism, and places the lock mechanism in the lock position or release position as the engagement member rotates. a link member 58, the link member moves the lock mechanism to the release position until the engaging member and the engaged member come into contact as the seat bag is folded down from the normal state. After the locking mechanism releases the lock of the seat cushion and the engaging member and the engaged member come into contact, the engaging member moves the engaged member to release the seat cushion. A seat device for an automobile, characterized in that a link member connected to the engaging member moves the locking mechanism to the released position or later to maintain the released state. 2. The engagement member is attached to one side of the frame 22 of the seat bag in the extending direction of the second rotation axis, and revolves around the second rotation axis as the seat bag rotates, and the lock mechanism , a first hole 46 provided in the frame 20 of the seat cushion, a second hole 48 provided in the member 34 on the base, and between the release position and the lock position in the width direction of the seat. a locking pin 52 that is movable in parallel in the first hole 4 in the locking position;
6 and the second hole 48, and a lock pin 52 that comes out of at least the second hole in the release position; and a spring 54 that biases the lock pin in the direction of the lock position; The member is a wire 58 that is tensioned between the engaging member and the lock pin 52, and the member is a wire 58 that is tensioned between the engaging member and the locking pin 52, and the member is a wire 58 that is connected to the second member of the engaging member when the seat bag falls down and the engaging member moves upward. A revolution movement around the rotation axis is converted by the wire into a translation movement of the lock pin, so that the wire pulls the lock pin toward the release position inside the width direction of the seat. Scope of claim for utility model registration No. 1
An automobile seat device according to claim 1.