JPH0215409B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is such that when the seat cushion is flipped up, the seat bag automatically falls forward, and when the seat bag is raised, the seat cushion automatically shifts to the prone position. This invention relates to rear seats for automobiles.

(Prior Art) Some rear seats are designed to expand the loading space by flipping up the seat cushion and folding the seat back forward. Because it requires a two-step operation of flipping up the seat cushion and then folding the seat bag forward, for example, when operating the lock knob A etc. from the front part of the seat, as shown in Figure 6A, In this case, the inverted seat cushion B hits the user's abdomen, etc., making it difficult to lower the seat cushion C, and when performing the same operation from the rear of the seat as shown in Figure B, Seat bag C
This has the problem that it gets in the way and makes the return operation difficult.

(Purpose) In view of these points, the present invention has been developed so that when the seat bag is inverted forward, the seat bag automatically falls forward, and conversely, when the seat bag is returned to its upright position, the seat cushion automatically moves backward. The purpose of this product is to provide a rear seat for automobiles that can be folded down into a sitting position.The main feature of this is that the seat cushion can be attached to a front support part fixed to the floor from a prone position to a sitting position. The rear seat for an automobile is rotatably supported by a front shaft in an inverted state, and the seat bag is rotatably supported by a rear shaft from an upright state in which the backrest can be turned to a reclined state on a rear support portion fixed to the floor, and the seat A front operating member for rotating the seat cushion is fixed to the front end side of the cushion, and the front operating member includes a circular base and an arm extending from the base along the side surface of the seat cushion. and,
a protrusion constituting a part of a locking mechanism formed on one side of the base; the center of the circular base is rotatably pivoted to the front shaft of the front support part; The operating member is provided with an elastic member that urges the seat cushion from an inverted state to a prone state, and an operating lever consisting of a lever body and a branching lever is pinned to the front support portion at the branching lever position, and the operating lever is One end of the lever engages with a protrusion formed on the operating member when the seat cushion is inverted, so that the protrusion can rotate the operating lever about a pin, and the other end of the operating lever engages with a protrusion formed on the operating member. is connected to the front end of the interlocking wire member, and forms part of a locking mechanism that locks the protrusion with one end of the actuating lever when the protrusion rotates the one end of the actuating lever. A stopper is formed on the front support portion, a rear operation member for rotating the seat bag is fixed to a lower end side of the seat bag, and the rear operation member has a circular base and a side surface of the seat bag extending from the base. The circular base has an arm portion extending straightly, and a protrusion forming part of a locking mechanism formed on one side of the base, and the center portion of the circular base is rotatable around the rear shaft of the rear support portion. The rear operating member is provided with an elastic member that urges the seat back from an upright state to a collapsed state, and an operating lever consisting of a lever body and a branching rod is pinned to the rear support portion at a branching lever position. , when one end of the actuating lever is in the upright state of the seat bag, the protrusion formed on the operating member is locked with a stopper forming a part of the locking mechanism formed on the rear support part, and the interlocking wire member is locked. The rear end is connected to the other end of the operating lever, and when the seat cushion is inverted, the interlocking wire member is pulled forward, and the engagement between the protrusion of the rear operating member and one end of the operating lever is released and locked. When the mechanism is released and the seat back is laid down, the protrusion of the rear operating member engages with one end of the actuating lever when the seat back is erected, the actuating lever is rotated about the pin, and the interlocking wire member is activated. It is characterized in that it can be pulled rearward to release the locking mechanism of the seat cushion and place the seat cushion in a down position.

(Example) The present invention will be described in detail below based on the illustrated example.

1 to 5 show a rear seat according to an embodiment of the present invention. Reference numerals 1 and 2 in the figures indicate a seat cushion and a seat back that constitute this rear seat. A front device 3 is attached to the lower part of the seat back 2 to support the seat back rotatably from a prone position in which the seat can be seated to an inverted position in which it is flipped forward. A rear device 4 is attached to support the vehicle so as to be rotatable from its original position to a position where it falls forward and lies down to secure cargo platform space.

The mechanisms of the front device 3 and the rear device 4 are symmetrical and are configured to interlock with each other. Specifically, first, the front device 3 rotatably supports the lower part of the seat cushion 1. Base 5 as a front support fixed to the floor
and an operating arm 7 as a front operating member fixed to one side of the seat cushion 1, and this operating arm 7 extends along a circular base 7a and a side surface of the seat cushion 1. The center part of the base part 7a is connected to the base 5 with the front shaft 5a.
The tip of the arm portion 7b is fixed to the side surface of the seat cushion 1. and,
A spiral spring 9 for biasing the operating arm 7 and the seat cushion 1 in the direction of the down position is housed inside the base 7a, and a locking spring 9 is provided on the outer periphery of the base 7a at a position facing the arm 7b. A protrusion 7c constituting a part of the mechanism is formed to protrude.

An operating lever 11 is provided on the surface of the base 5 below the operating arm 7. The operating lever 11 is 1
A book rod-shaped lever body 11a and this lever body 1
It consists of a branching rod 11b that branches laterally at a position slightly lower than the upper end of 1a, and is rotatably supported by pinning this branching rod 11b to the base 5. When the above-mentioned operating arm 7 is rotated counterclockwise in the figure and the projection 7c moves downward, the upper end of the lever main body 11a is pressed against the surface of the projection 7c and becomes the branch rod 11b.
Rotate clockwise using the pin as a pivot point. Further, the valley 11c formed between the upper end of the lever body 11a and the branching rod 11b is located at a position where the projection 7c contacts the stopper 13 protruding from the surface of the base 5 when the operating arm 7 is rotated counterclockwise. When the seat cushion 1 is in a completely inverted position, the projection 7c of the operating arm 7 is received, and the seat cushion 1 is locked in this position.

The front end of a flexible interlocking wire member 15 is fixed to the lower end of the actuating lever 11.
The rear end of 5 is fixed to the lower end of a similar actuating lever 12 of rear device 4. Interlocking wire member 1
5 is the position on the seat bag 2 side when the actuating lever 11 on the seat cushion 1 side is in the position where the protrusion 7c of the operating arm 7 is engaged and the seat cushion 1 is locked (position X in Fig. 4). Actuation lever 12
is set to a length such that it can be held in a lock position (position X' in FIG. 2), which will be described later, via this interlocking wire member 15.

The rear device 4 on the side of the seat back 2 is composed of the same components as the front device 3 described above, and the reference numeral 8 in the figure is an operating arm as a rear operating member.
It is pivotally attached to a base 6 serving as a rear support portion by a rear shaft 6a, and is composed of an arm portion 8b and a base portion 8a similarly to the front device 3, and a spiral spring 10 is mounted inside the base portion 8a. This spiral spring 10, contrary to the spiral spring 9 on the seat cushion 1 side, rotates the operating arm 8 and the seat back 2 in a counterclockwise direction, that is, biases the seat back 2 in a direction in which it is tilted forward.

The operating lever 12 is rotatably supported on the base 6 in opposition to the operating lever 11 on the seat cushion 1 side. Then, when the seat back 2 is in the upright position where the backrest can be rested, the operating arm 8
The projection 8c is configured to be received in the valley 12c between the lever body 12a and the branching rod 12b to maintain the seat bag 2 in the above-mentioned upright state. In addition, the operating lever 12 is always in the locked position (second position).
Spring 1 so that it can hold the position (X' position in the figure)
6.

Reference numeral 14 in the figure is a stopper for restricting the rotation of the operating arm 8, which is provided protrudingly from the surface of the base 6 on the side of the seat bag 2.

To explain the operation of this embodiment, first,
Assuming that this rear seat is set in the normal seatable state, the actuating lever 12 on the seat back 2 side is activated when the seat back 2 is in the upright state.
Interlocking wire member 15 in the substantially vertical locking position X' shown and having a predetermined length accordingly.
The operating lever 11 on the side of the seat cushion 1 connected via the lever 11 is also in the lockable position X. and,
The user gradually moves the seat cushion 1 by rotating the operating arm 7 on the seat cushion 1 side counterclockwise.
When the lever is turned upside down, the protrusion 7c touches the upper end of the operating lever 11 in the lockable position from the front and rotates it clockwise. As a result, the lower end of the lever body 11a also rotates in the same direction, pulling the interlocking wire member 15 forward (see FIG. 3).

When the interlocking wire member 15 is pulled forward,
The lower end of the operating lever 12 on the seat back 2 side rotates clockwise against the biasing force of the spring 16, and the operating arm 8 engages with the upper valley 12c.
The protrusion 8c is removed.

The disengaged operating arm 8 and seat back 2 rotate counterclockwise by the biasing force of the spiral spring 10 and fall forward, automatically forming a cargo platform (see Fig. 4). .

Note that when the seat cushion 1 is completely inverted and the protrusion 7c of the operating arm 7 passes over the upper end of the operating lever 11, the operating lever 1 on the cushion 1 side
1 is released, the spring 16 that urges the actuating lever 12 on the seat cushion 2 side returns the actuating levers 11 and 12 to their original, almost vertical position, and the actuating lever 12 on the seat cushion 1 side The operating lever 11 engages the protrusion 7c of the operating arm 7 in the upper valley 11c to lock it.

To reversely set the seating position from this state, first rotate the operating arm 8 on the seat bag 2 side clockwise to gradually raise the seat bag 2. The upper end is pressed from behind to rotate it counterclockwise, and the interlocking wire member 15 fixed to the lower end of the lever 12 is pulled rearward. Interlocking wire member 1
When 5 is pulled backwards, seat cushion 1
The lower end of the operating lever 11 on the side rotates clockwise,
Disengage the protrusion 7c. As a result, the operating arm 7
The seat cushion 1 automatically returns to the down position under the action of the spiral spring 9 (see FIG. 5).

When the operating arm 8 on the seat bag 2 side is fully raised, the protrusion 8c on the same side climbs over the upper end of the operating lever 12 and enters the valley 12c, releasing the pressing force on the upper end of the lever body 12a. Therefore, the operating lever 12 returns to the lock position by the biasing force of the spring 16, and accordingly, the operating lever 12 on the seat cushion 1 side
1 will also return to the lockable position (second
(see figure).

It should be noted that the above-mentioned embodiment shows the most suitable example of the present invention, and the present invention can be applied to other rotating seats, for example, and various design changes can be made without departing from the spirit thereof. Needless to say.

(Effects) As described above, according to the present invention, the seat cushion is biased by the elastic member in the direction of the prone state in which the seat can be seated, while the seat back is biased by the elastic member in the direction of the forward-folding state. energized, and the seat cushion is locked by the locking mechanism in the inverted position, while the seat bag is locked by the locking mechanism in the upright position where the backrest is possible, changing the seat cushion to the inverted position. The locking mechanism of the seat cushion is released via the interlocking wire member when the seatback is moved to the upright position, and the locking mechanism of the seat cushion is similarly released via the interlocking wire member when the seatback is changed to the upright position. Therefore, when the seat bag is flipped up and inverted forward, the seat bag is unlocked and the seat bag can be automatically folded forward by the biasing force of the elastic member, and conversely, when the seat bag is returned to its upright position,
Similarly, when the seat cushion is unlocked, the elastic member automatically returns the seat cushion to the prone position in which the seat can be seated, and by operating either the seat back or the seat cushion. This makes it possible to automatically operate the other.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a seat according to an embodiment of the present invention, Figs. 2 to 5 are explanatory diagrams showing the operation of its main parts, and Fig. 6 A and B show problems in use of the conventional example. FIG. In the figure, 1 is a seat cushion, 2 is a seat back, 3 is a front device, 4 is a rear device,
5 and 6 are bases, 7 and 8 are operating arms, 7a and 8
a is the base, 7b, 8b are arm parts, 7c, 8c are protrusions, 9, 10 are spiral springs, 11, 12 are operating levers, 11a, 12a are lever bodies, 11
b, 12b are branch rods, 11c, 12c are valleys, 1
3 and 14 are stoppers, 15 is an interlocking wire member,
16 is a spring.

Claims (1)

[Scope of Claims] 1. A seat cushion is rotatably supported by a front shaft from a prone position in which the seat cushion can be seated to an inverted position on a front support part fixed to the floor, and a seat cushion is rotatably supported on a rear support part fixed to the floor. In an automobile rear seat in which a seat back is rotatably supported by a rear shaft from an upright state in which the backrest can be rested to a collapsed state, a front operating member for rotating the seat cushion is fixed to a front end side of the seat cushion, The front operating member includes a circular base, an arm extending from the base along a side surface of the seat cushion, and a protrusion forming part of a locking mechanism formed on one side of the base. A center portion of a circular base portion is rotatably pivoted to the front shaft of the front support portion, and the front operation member includes an elastic member that biases the seat cushion from an inverted state to a prone state. an operating lever consisting of a lever body and a branching rod is pinned to the front support portion at the branching lever position, and one end of the operating lever is formed on the operating member when the seat cushion is inverted. the protrusion is adapted to rotate the actuating lever about the pin; the other end of the actuating lever is connected to the front end of the interlocking wire member; and the protruding portion is connected to one end of the actuating lever. A stopper is formed on the front support portion and constitutes a part of a locking mechanism that locks the protrusion with one end of the operating lever when the seatback is rotated, and a stopper is formed on the front support portion to lock the seatback on the lower end side of the seatback. A rear operating member for rotational operation is fixed, and the rear operating member includes a circular base, an arm extending from the base along the side of the seat bag, and a locking mechanism formed on one side of the base. a projection constituting a section, a center portion of a circular base is rotatably pivoted to the rear shaft of the rear support section, and the rear operation member biases the seat back from an upright state to a collapsed state. An operating lever consisting of a lever body and a branching rod is pinned to the rear support portion at the branching rod position, and one end of the operating lever is connected to a projection formed on the operating member when the seat bag is in an upright state. and a stopper forming a part of a locking mechanism formed on the rear support part, and the rear end of the interlocking wire member is connected to the other end of the operating lever, and the seat cushion is inverted. When the interlocking wire member is pulled forward, the engagement between the protrusion of the rear operating member and one end of the operating lever is released to release the locking mechanism, and the seat back can be placed in the reclined state. The protrusion of the rear operating member engages with one end of the operating lever, rotates the operating lever around the pin, and the interlocking wire member is pulled rearward to release the seat cushion locking mechanism and place the seat cushion in the down position. A rear seat for an automobile, characterized in that the rear seat is configured to be able to perform the following functions.