JPH0433146Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a folding mechanism for a vehicle seat, particularly a rear seat installed in a luggage compartment.

(Prior Art) An example of the conventional art is Japanese Utility Model Publication No. 1983-4513. This publication states that an upper rotating shaft is provided on the back of the seat at a position higher than the floor of the cargo platform, a lower rotating shaft is provided on the vehicle body at a position lower than the floor of the cargo platform, and a rotating plate is fitted to the upper and lower rotating shafts. A rear seat support device is disclosed that connects the seat back and the vehicle body.

(Problem to be solved by the invention) In the above support device, when the rear seat is folded, the rotating plate falls sideways forward and the upper rotating shaft moves forward and downward in an arc, so that the rear end of the rear seat is connected to the lower rotating shaft. There is a problem in that a large gap is formed between the floor of the cargo platform and the rear end of the rear seat due to the forward circular movement.

The object of the present invention is to solve the above-mentioned problems and store the seat bag in an orderly manner in front of the floor surface of the luggage compartment without any gaps.

(Means for solving the problem) The vehicle seat folding mechanism of the present invention is capable of rotating the lower end of the support leg attached to the front part of the seat cushion forward to an installation surface below the floor surface of the cargo compartment. The upper end of the lower bracket, which is connected to the support leg and attached to the installation surface at the rear of the support leg, is rotatable in the vertical direction, and is locked in a state in which it protrudes from the floor surface at the upper end of the lower movement. A reclining base is connected to the end of the reclining base which is stored in a sideways position facing rearward below the floor surface, and a center arm is connected to the reclining base so as to be rotatable in the front and back direction about the lower hinge point as a fulcrum; An upper arm attached to the lower end of the seat bag is connected to an upper arm attached to the lower end of the seat bag so as to be able to bend and extend using the upper hinge point as a fulcrum, which moves in an arc in the front and back direction using the lower hinge point as a fulcrum, and to be lockable in the extended state. , the lower hinge point is arranged so that when the reclining base rotates from an upper moving end to a lower moving end, the lower hinge point moves in an arc from above to below the floor surface, and the upper hinge point When the base is rotated to the lower end and the seat bag is folded, the upper hinge point is disposed below the floor surface and displaced rearward and upward from the lower hinge point.

(Function) The reclining base, which is connected to the upper end of the lower bracket attached to the installation surface below the floor surface of the luggage compartment so as to be rotatable in the vertical direction, is rotated to the upper end and locked. A center arm rotatably connected to the base about the lower hinge point as a fulcrum, and an upper arm attached to the lower end of the seat bag and connected to the center arm so as to be able to bend and extend about the upper hinge point as the fulcrum, are extended. When the seat bag is tilted forward in an upright state, the center arm rotates forward about the lower hinge point and the seat bag rotates forward about the upper hinge point. In this state, when the reclining base is unlocked and the seat back is further tilted forward, the lower hinge point moves downward in an arc, the upper arm and the center arm are bent, and the upper hinge point Move backward in an arc using the lower hinge point as a fulcrum. When the seat bag is folded onto the installation surface, the reclining base rotates to the lower end and is stored rearward in a sideways state, and the lower hinge point moves in an arc from above to below the floor surface. However, the upper hinge point is displaced rearward and upward under the floor surface, and the seat bag is stored in a horizontal position below the floor surface with the storage position of the seat bag shifted rearward.

(Example) Next, an example of the present invention will be described with reference to the drawings.

The reclining rear seat S is recessed in the front part of the floor of the luggage compartment of the van-type vehicle and is installed so as to be foldable and unfoldable on an installation surface M formed below the floor surface F.

A support leg 3 for supporting the front part of the seat cushion 1 is installed vertically on the lower front side of the seat cushion 1 of the rear seat S, and the lower end of this support leg 3 is connected to the installation surface M.
The seat cushion 1 is pivotally connected to the upper part via a hinge pin 4 so as to be rotatable in the front-rear direction.
It is installed so that it can be laid down at the rear and stood up at the front.

A pair of left and right lower brackets 5 whose side surfaces are formed into a substantially square shape are fastened with bolts on the installation surface M and are arranged behind the supporting legs 3. Guide grooves 5b curved in an arc shape centering on the through holes 5a are respectively provided through the guide grooves 5b.

A pair of locking mechanisms 6 are attached to the inner surfaces of the upper rear corners of both lower brackets 5, facing the upper ends of the guide grooves 5b, respectively.
A pair of left and right locking pieces 8 protruding from the rear lower surface of the seat cushion 1 are releasably engaged with the lock base 6a, so that when the seat cushion 1 falls sideways, the rear part of the seat cushion 1 locks into the lock base 6a. and is supported by both lower brackets 5 via locking pieces 8. At the center of the lower end of the lock base 6a, there is formed a recess 20 which is recessed in a substantially inverted U-shape so as to face the upper end of the guide groove 5b of the lower bracket 5. At the outer surface of the lock base 6a, the upper end is formed with a spring 21. A pair of lock plates 6b, 6b, which are biased toward the approach direction and meshed so that they can interlock in the same direction, are each pinned so as to be swingable, and one lock plate 6b has this lock plate 6b swingable. A lower operating lever 7 for operation is connected, and a latching recess 22 is recessed in the lower part of the other lock plate 6c, facing the recess 22 of the lock base 6a, so that the lower operating lever 7 can be pushed down. At times, the lock plates 6b and 6c swing, and the locking recess 22 is retracted from the position facing the recess 20.

A pair of left and right reclining bases 9, each having a substantially diamond-shaped side surface, are connected to the front upper end of the lower bracket 5 through the front lower end thereof and a pin 10 inserted through the through hole 5a of the lower bracket 5. Each lock pin 11 is pinned to the lower bracket 5 so as to be rotatable in the vertical direction, and is inserted through the rear lower corner portion of the reclining base 9. The lock pin 11 is inserted into the guide groove 5b of the lower bracket 5. And both reclining bases 9
When the lock pin 11 rotates to the upper moving end, the lock pin 11 engages the locking recess 2 of the lock plate 6c of the lock mechanism 6.
2 and both reclining bases 9 are respectively locked at the upper moving end. On the other hand, when the lower operation lever 7 is pushed down and the lock plates 6b, 6c are swung, the engagement recess 22 and the lock pin 11 are engaged with each other. The state is released and the downward rotation movement of the reclining base 9 is permitted. When the reclining base 9 rotates to the lower end, the front edge 9a of the reclining base 9 is displaced slightly below the upper edge 5c of the lower bracket 5.

The left and right pair of center arms 12 are each connected to the tip of the reclining base 9 via a pin 13 so as to be rotatable in the front-rear direction about the upper hinge point a, and a mainspring spring externally fitted on the pin 13. 14 and is biased backward. The upper ends of both center arms 12 are connected via connecting pins 16 to the lower ends of left and right upper arms 15 attached to the lower ends of both sides of the seat bag 2, respectively.
The center arm 12 and the upper arm 15 are connected to be able to bend and extend with the lower hinge point b as the fulcrum, and as the arms 12 and 15 bend and extend, the upper hinge point a moves in an arc in the front and back direction with the lower hinge point b as the fulcrum. do. A lock pin 19 protruding from the lower end of the outer surface of the upper arm 15 is disposed near the center of the inner surface of the center arm 12 to lock the center arm 12 and the upper arm 15 in an extended state in which the seat bag 2 is held in an upright position. A latching pawl 18 connected to the upper operating lever 17 for unlocking is pinned so as to be able to swing vertically, and both center arms 12 and both upper arms 15 can be bent and extended, respectively. Lockably linked.

Then, the seat cushion 1 is laid down horizontally and the seat bag 2 is raised (see Figure 1 A).
When folding the rear seat S, the seat cushion 1 is rotated forward together with the support leg 3 about the hinge pin 4 to stand up on the installation surface M, and then the upper operating lever 17 is pulled to close the center arm 12.
Release the locked state between the upper arm 15 and the upper arm 15, tilt the seat back 2 forward using the lower hinge point b between the center arm 12 and the reclining base 9 as a fulcrum (see Fig. 1(b)), and then release the lower operating lever 7. Push down to release the locked state of the reclining base 9, and rotate the reclining base 9 downward (see Fig. 1, c). Further, by rotating the reclining base 9 downward and bending the center arm 12 and upper arm 15, the seat back 2 is further tilted forward using the upper hinge point a between the center arm 12 and the back seat 2 as a fulcrum, and pushed down. , when the seat back 2 falls sideways, the upper hinge point a between the center arm 12 and the seat back 2, and the lower hinge point b between the center arm 12 and the reclining base 9.
are respectively displaced from above to below the floor surface F,
Place the seat back 2 on the floor surface F with its back side horizontal.
It can be stored under the floor plane F so that it is aligned with the floor surface F (see FIG. 1D).

When the stored rear seat S is unfolded, it is rotated above the reclining base 9 to the moving end, the lock plate 6c of the locking mechanism 6 engages the lock pin 11, and the seat is locked above the reclining base 9 at the moving end. Then, rotate the seat back 2 rearward to stand it up, rotate the center arm 12 rearward, and then rotate the reclining base 9 and center arm 1.
2 is locked in the extended state, the seat cushion 1 is further rotated rearward and laid down, and the locking pawl 8 is engaged with the lock base 6a, thereby locking the seat cushion in the sideways posture. .

Next, the operation and effects of the embodiment having the above configuration will be explained.

In this example, the lower end of the support leg 3 attached to the front part of the seat cushion 1 is connected to the installation surface M below the floor surface F of the luggage compartment so as to be rotatable forward, and the rear end of the support leg 3 lower bracket 5 attached to
The upper end can be rotated in the vertical direction, and at the upper moving end it is locked while protruding from the floor surface F, and at the lower moving end it is stored horizontally below the floor surface F toward the rear. The center arm 12, which is connected to the reclining base 9 so as to be rotatable in the front-rear direction about the lower hinge point b, and the upper arm 15, which is attached to the lower end of the seat back 2, are The upper hinge point a moves in an arc in the front and back direction using the hinge point b as a fulcrum, and is connected to the upper hinge point a so that it can bend and extend and lock in the extended state, and the reclining base 9 moves the lower hinge point b from the upper moving end to the lower side. Lower hinge point b when rotated to the moving end
is arranged so that it moves in an arc downward from above the floor surface F, and when the upper hinge point a is rotated to the lower end of the reclining base 9 and the seat back 2 is folded, the upper hinge point a is moved downward from the floor surface F. It is disposed below the plane F so as to be displaced rearward and upward at the lower hinge point b.

Therefore, the rear seat S can be easily converted between the unfolded state and the folded state, and when the rear seat S is in the folded state, the back surface of the seat back 2 can be aligned with the floor surface F and the seat back 2 can be stored below the floor surface F. This has the effect of eliminating the step formed when the seat bag is folded and making the entire floor surface of the luggage compartment flat when in use, improving loading conditions into the luggage compartment and expanding the space of the luggage compartment.

In particular, when the seat bag 2 is folded, the lower hinge point b moves in an arc downward from above the floor surface F, and the upper hinge point a moves in an arc backwards using the lower hinge point b as a fulcrum, thereby lowering the floor surface F. Since the seat back 2 is displaced backward from the lower hinge point b, the seat back 2 is moved backward by a distance corresponding to the horizontal component of the distance between the hinge points a and b.
can be stored under the floor surface F, the gap between the folded seat bag 2 and the floor surface F is reduced, and the seat bag 2 can be neatly stored in front of the floor surface F.

In the above embodiment, a seat track may be laid on the installation surface M, the hinge pin 4 of the support leg 3 and the lower bracket 5 may be mounted on this seat track, and a seat slide mechanism may be added.

In addition, as shown in Fig. 6, the lower bracket 5
The through hole 5a is formed in the shape of an arc hole, and the pin 10
A locking mechanism 6A for locking the reclining bracket may be provided, and the rotational fulcrum of the reclining bracket may be moved in an arc to change the rotational locus of the seat back.

(Effect of the invention) By having the above-mentioned configuration of the invention, when the seat bag is folded, the lower hinge point moves in an arc from above to below the floor surface, and the upper hinge point moves in a circular arc downward from the floor surface. The fulcrum moves in a circular arc backwards and is displaced below the floor surface to the rear of the lower hinge point, so the seat bag is moved backwards by a distance corresponding to the horizontal component of the distance between both hinge points when the seat bag is stored. The seat bag can be stored under the floor surface, and the gap between the folded seat bag and the floor surface can be reduced and the seat bag can be neatly stored in front of the floor surface.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Figure 1 A, B, C, and D are side views showing the process of the rear seat from the unfolded state to the folded state in order, and Figure 2 is an exploded view of the folding mechanism of the seat back. 3 is a front view when unfolded, FIG. 4 is a front view when folded, FIG. 5 is an enlarged perspective view of the locking mechanism, and FIG. 6 is a perspective view showing another example of the folding mechanism of the seat bag. It is a diagram. 1... Seat cushion, 2... Seat bag, 3... Support leg, 5... Lower bracket, 6...
Lock mechanism, 9... Reclining base, 12
...Center arm, a...Hinge point, F...
...floor surface, M...installation surface.

Claims (1)

[Scope of utility model registration request] The lower end of the support leg attached to the front part of the seat cushion is connected so as to be rotatable forward to an installation surface below the floor surface of the luggage compartment, and the lower end of the support leg attached to the installation surface is attached to the rear of the support leg. The upper end is rotatable in the vertical direction, and at the upper end it is locked in a state where it protrudes from the floor surface, and at the lower end it is stored in a sideways state below the floor surface toward the rear. A reclining base is connected to the reclining base, and a center arm is connected to the reclining base so as to be rotatable in the front and back direction using the lower hinge point as a fulcrum, and an upper arm attached to the lower end of the seat bag is connected to the reclining base using the lower hinge point as a fulcrum. The upper hinge point, which moves in a circular arc in the front-rear direction, is connected as a fulcrum to enable bending and stretching movements and to be lockable in the extended state, and the lower hinge point is connected when the reclining base rotates from an upper end of motion to a lower end of motion. The lower hinge point is arranged to move in an arc from above to below the floor surface, and when the reclining base is rotated to the lower end and the seat bag is folded, the upper hinge point A folding mechanism for a vehicle seat, characterized in that a hinge point is disposed below the floor surface and displaced upward and behind the lower hinge point.