JPH0867181A - Seat for vehicle - Google Patents

Abstract

PURPOSE: To realize a simple structure of a rotary locking mechanism attached to the rotary supporting device of a seat for a vehicle, and a rotary angle regulating mechanism to regulate the seat within a specific angular scope. CONSTITUTION: A seat main body which consists of a seat cushion and a seat back erected tiltable at the back surface side of the seat cushion; and a rotary supporting device 10 to support the seat main body allowable to regulate the rotation on the car room floor surface; are provided. To the rotary supporting device 10, a rotary locking mechanism 11 to lock the rotation of the seat main body at a specific position; and a seat rotary angle regulating mechanism 12 operated interlocking to the falling of the seat back when the seat back falls forward, and to regulate the seat main body within a specific angular scope; are attached. The rotary locking mechanism 11 and the rotary angle regulating mechanism 12 are composed integrally through a lock lever mechanism, and attached to a part of the rotary supporting device 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat mainly mounted on an automobile or the like, and more particularly to a rotary seat suitable for use as a rear seat of an automobile.

[0002]

2. Description of the Related Art As shown in FIG. 5, in a vehicle 1 such as a van type automobile, three rows of seats are provided on a floor 2 of a passenger compartment, that is, a driver's seat 3 and an assist seat 4 from the front row. It is known that the second seat 5 and the third seat 6 are arranged. Then, in the vehicle 1 having such a configuration, when getting on and off the third seat 6, the seat back 5B of the second seat 5 is tilted forward on the seat cushion 5A as shown in FIG. .

Here, a case where a bench type seat including the third seat 6 is used as the second seat 5 is illustrated. Although not shown, the second seat 5 is provided with a known reclining mechanism, and the seat back 5B is configured to be tiltable toward the back side or the front side. Further, in FIG. 5, reference symbol P is reference symbol 1 in FIG.
A rotation support mechanism indicated by 0 is provided so as to intervene between the vehicle compartment floor surface 2 and the seat 5, so that the seat 5 can rotate about P as shown in FIG. 7 and the orientation of the seat can be arbitrarily changed. Is configured.

However, in such a seat arrangement structure, if the second seat 5 is a large bench seat as shown in FIG. 6, even if the seat back 5B is tilted forward,
This may cause a problem that a sufficient space cannot be secured when getting on and off the third seat 6.

Therefore, the above-mentioned second seat 5 is
A rotation lock mechanism that allows the seat 5 to rotate on the floor surface 2 of the passenger compartment by using the rotation support device 10, and a seat rotation that restricts the seat 5 within a predetermined rotation angle range. A structure in which an angle regulation mechanism (both not shown) is attached to the rotary support device 10 has been already proposed.

According to the second seat 5 having such a structure, the rotation lock mechanism is unlocked,
As shown in FIG. 7, the rotation support device 10 rotates the entire seat 5 on the floor 2 of the passenger compartment to change the direction of the seat 5 as desired, and the seat rotation angle restricting mechanism shown in FIG. As described above, the walk-in operation is interlocked with the forward operation of the seat back 5B, that is, the seat back 5B is rotated to a predetermined angle θ (for example, about 15 degrees), thereby providing a space for the passenger to get in and out of the third seat 6, which is a rear seat. I am able to secure it.

By the way, in such a conventional seat structure, the rotation support device 10 for supporting the second seat 5 on the floor surface 2 of the vehicle compartment so as to be adjustable in rotation has a predetermined rotation position (for example, 1).
A rotation lock mechanism for locking and fixing at a reversal rotation position of 80 degrees) and a rotation angle restriction for performing a walk-in operation by locking the seat so that the seat is rotatable at a predetermined rotation angle θ (for example, about 15 degrees). The mechanism and the mechanism are attached to the two positions shifted in the rotational direction by a separate structure.

Here, the rotation support device 10 may be any mechanism as long as the main body of the seat 5 can be rotationally adjusted about P on the floor surface 2 of the passenger compartment and the orientation of the seat can be adjusted arbitrarily. Those having various configurations may be appropriately adopted.

[0009]

However, according to the above-described conventional structure, the rotation support device 10 is provided with the lock portion by the rotation lock mechanism and the lock portion by the rotation angle regulating mechanism, respectively. It was necessary to have a large number of component parts that make up the lock part of the mechanism. Therefore, the structure of the rotary type seat 5 is complicated, and there are problems in terms of assemblability and cost, and it is desired to take some measures to solve such problems.

The present invention has been made in view of the above circumstances, and in a rotary seat that supports the seat body so as to be rotatable and adjustable on the floor of the passenger compartment, an occupant can easily get in and out of the rear seat. It is an object of the present invention to obtain an inexpensive vehicle seat with a simple structure including a rotation support device having a so-called walk-in function.

[0011]

In order to meet such demands, a vehicle seat according to the present invention is a seat main body including a seat cushion and a seat back which is tiltably erected on the back side of the seat cushion, and this seat. A rotation support device that supports the main body on the floor of the passenger compartment so that the rotation is adjustable, a rotation lock mechanism that is attached to the main body to lock the rotation of the seat body at a predetermined position, and a seat of the seat body that is also attached to the rotation support device. A seat rotation angle regulation mechanism that regulates the seat body within a predetermined rotation angle range is provided when the back is tilted forward, and the seat rotation angle regulation mechanism is provided. These two mechanisms are integrated by a lock lever mechanism section. It is configured and attached to a part of the rotation support device.

In the vehicle seat according to the present invention, the lock lever mechanism portion of the rotation supporting device that also serves as the rotation lock mechanism and the rotation angle regulation mechanism is provided with the lock groove and the rotation regulation groove extending over a predetermined rotation angle range. The latch plate includes a lock plate, a lock groove of the latch plate, and a lock lever having a lock pin that can be engaged in the rotation restricting groove. By operating the lock lever by a first-stage external operation, the lock groove of the lock pin is provided. Is disengaged, the lock pin is positioned in the rotation restricting groove, and is operated by the second stage external operation, so that the lock pin is rotated to a position not engaging with the lock groove and the rotation restricting groove. It is configured to move.

Further, in the vehicle seat according to the present invention, the lock lever is provided with a rotation restricting lever which is rotationally operated by a first stage external operation such as a manual operation, and a second lever which is interlocked with a seat back forward operation or the like. It is composed of a lock release lever that is rotated by a step outside operation, and a lock pin that can be engaged in the lock groove of the latch plate and the rotation restriction groove is provided in a part of the lock release lever When the lever is actuated, the lock release lever is interlocked to rotate.

[0014]

According to the present invention, a lock lever mechanism unit in which a rotation lock mechanism and a rotation angle regulation mechanism are integrated is attached to a part of the rotation support device, and each mechanism is first stage external operation, first. It can be operated arbitrarily by a two-stage external operation.

Further, according to the present invention, the lock pin of the lock lever which is integrally or integrally operated by the first and second external operations is selectively placed in the lock groove and the rotation restricting groove of the latch plate. Can be engaged,
Locking, unlocking at the predetermined rotation position of the rotation support device,
Further, it becomes possible to perform a rotating operation within a predetermined rotation angle range.

[0016]

1 to 4 show an embodiment of a vehicle seat according to the present invention. In these figures, the same or corresponding parts as in FIG. To do. In the vehicle seat according to the present invention, the bench type second seat 5 shown in FIG. 5 and subsequent figures is rotated so as to face the third seat 6 by being inverted as described above, and is rotated within a slight angle range. The third seat 6 can be operated so as to easily get in and out of the third seat 6, and a detailed description thereof will be omitted.

According to the present invention, a seat main body (hereinafter referred to as reference numeral 5) comprising a seat cushion 5A and a seat back 5B which is tiltably erected on the back side of the seat cushion 5 through a reclining mechanism, and this seat. A rotary support device 10 that supports the main body 5 on the floor surface 2 of the vehicle compartment so as to be adjustable in rotation, and a rotation lock mechanism 11 that is attached to the rotary support device 10 and locks the rotation of the seat main body 5 at a predetermined position. A seat rotation angle regulation mechanism that is attached to the support device 10 and is operated in conjunction with the seat back 5B of the seat body 5 when the seat back 5B is tilted forward to regulate the seat body 5 within a predetermined rotation angle range θ. 1 to FIG.
As is apparent from the above, the rotation lock mechanism 11 and the rotation angle regulation mechanism 12 are integrally formed by the lock lever mechanism portion 20 and are characterized by being attached to a part of the rotation support device 10.

More specifically, the lock lever mechanism portion 20 which is attached to the rotation supporting device 10 and serves both as the rotation lock mechanism 11 and the rotation angle regulating mechanism 12 has a lock groove 21 as shown in FIGS. And a latch plate 23 having a rotation restricting groove 22 extending over a predetermined rotation angle range θ, a lock groove 21 of the latch plate 23, and a lock lever 25 having a lock pin 24 engageable in the rotation restricting groove 22.
It has and.

Here, in this embodiment, as the lock lever 25, a lock pin 24 is provided at one end and, for example, via a rotation lock releasing wire 26 which is interlocked with a manual lock releasing lever (not shown), or the release. A lock plate lever 27 that is a lock release lever that is rotated by being directly operated by a lever, and a walk-in lever that is a rotation restricting lever that is coaxially supported by the lock plate lever 27 and that constitutes a double lever mechanism. Two
8 and.

The walk-in lever 28 is rotated by a walk-in operation wire 29 which is interlocked with the forward tilting operation of the seat back 5B or the operation of a walk-in operation lever (not shown) in the reclining mechanism. ing. Incidentally, reference numeral 25a in the drawing denotes a shaft support pin for both levers 27 and 28.

Further, an engaging claw portion 28a is provided at one end of the walk-in lever 28, and the engaging claw portion 28a engages with a lever portion of the lock plate lever 27 on the lock pin 24 side to walk. It is designed to be rotated in conjunction with each other during the in operation.

Further, in the figure, 13 is an upper surface plate of the rotary support device 10, 14 is a main body cylindrical portion of the device 10 which can rotate relatively thereto, and the lock lever 25 by the double lever described above is one of the upper surface plate 13. The latch plate 23 is pivotally supported on the main body cylinder portion 14 side. The seat body 5 is placed on the upper surface plate 13 via a slide mechanism (not shown) that can be slid in the longitudinal direction of the seat.

Further, in this embodiment, as apparent from FIGS. 3 and 4, a second latch plate 30 having a lock groove 30a is provided at a position opposed to the latch plate 23 by 180 degrees in the circumferential direction. Thus, when the seat body 5 is rotated in the reverse direction, the lock state is maintained by the engagement of the lock pin 24 in the lock plate lever 27, and the facing state with the rear seat of the seat can be maintained.

Further, 31 in the drawing is a lock plate lever 2
7 is a spring that biases 7 in the locking direction. In addition, 32 in the figure
Is a first stopper that restricts the rotation of the walk-in lever 28 by engaging with the lock portion 28b of the walk-in lever 28, and 33 locks the lock plate lever 27 and the walk-in lever 28 at the lock position and 27
Is a second stopper that engages with the stopper locking portion 27b of the walk-in lever 28 when the lock is released and restricts the rotation range thereof.

Then, the walk-in lever 28 of the lock lever 25 is actuated by the first step external operation to release the engagement of the lock pin 24 with the lock groove 21 of the latch plate 23, and the lock pin 2 is released.
By positioning 4 in the rotation restricting groove 22 of the latch plate 23, the rotation support device 10 can be walk-in rotated within a predetermined angle range as shown in FIG.

Further, by operating the lock plate lever 27 of the lock lever 25 by the second stage external operation, the lock pin 24 is rotated to an outer position where it does not engage with the lock groove 21 and the rotation restricting groove 22. It is designed to let you. When the lock pin 24 is rotated to the non-engagement position, the seat body 5 can be turned and rotated by the rotation support device 10.

According to this structure, the rotation supporting device 1
A lock lever mechanism unit 2 in which a rotation lock mechanism 11 and a rotation angle regulation mechanism 12 attached to a part of 0 in the circumferential direction are integrated.
With 0, the mechanisms 11 and 12 can be arbitrarily operated by the first-stage external operation and the second-stage external operation, and the walk-in operation and the rotation lock release can be performed in a required state.

Further, in the above-mentioned structure, the lock lever 25 which is integrally operated by the external operation of the first step and the second step.
It is possible to selectively engage the lock pin 24 in the lock groove 21 and the rotation restricting groove 22 of the latch plate 23 to lock and unlock the rotation support device 10 at a predetermined rotation position, and further to a predetermined rotation angle. It is possible to rotate within a range.

According to such a structure, the lock lever mechanism portion 20 which also functions as the rotation lock mechanism 11 and the rotation angle regulation mechanism 12 attached to the rotation support device 10 has a simple structure. As a result, the number of constituent parts as a whole can be reduced as compared with the conventional one, and the structure can be simplified and the cost can be reduced.

The present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part of the second seat 5 which is a rotary type vehicle seat can be freely modified or changed as necessary. Therefore, various modifications can be considered.

For example, in the above-described embodiment, the case where the lock plate lever 27 and the walk-in lever 28 by the double lever mechanism are used as the lock lever 25 has been described, but the present invention is not limited to this and these levers are used. 27 and 28 are integrally structured so that the lock release or the walk-in operation is performed depending on the operation stroke amount (rotation amount) of the rotating operation means such as a wire for rotating the lever 25. Good. That is, the walk-in operation may be performed when the operation stroke is small, and the lock may be released when the operation stroke is large.

Further, as the first-stage external operation transmitted via the wire 29, the operation interlocking with the reclining mechanism, the dedicated lever, the operation interlocking with the forward tilting movement of the seat back, etc. are transmitted. This may be the same for the second stage external operation on the wire 26 side.

Further, in the above-mentioned embodiment, the present invention is applied to the bench type second seat 5, but the present invention is not limited to this, and may be applied to a single seat, or need not be the second seat. Is.

[0034]

As described above, according to the vehicle seat of the present invention, the seat cushion and the seat main body by the seat back which is tiltably erected on the back side thereof, and the seat main body on the floor surface of the passenger compartment. A rotation support device that supports adjustable rotation, a rotation lock mechanism that is attached to this rotation support device and locks the rotation of the seat body at a predetermined position, and interlocks with this when the seat back of the seat body moves forward. A seat rotation angle regulation mechanism that is operated to regulate the seat body within a predetermined rotation angle range is provided, and the rotation lock mechanism and the rotation angle regulation mechanism are integrally formed by a lock lever mechanism section. Since it is attached to a part, the number of components of the rotation lock mechanism and the rotation angle regulation mechanism attached to the rotation support device can be controlled in spite of the simple structure. It can be reduced as compared with, thereby simplifying and cost reduction of the structure.

Further, according to the vehicle seat of the present invention, the lock lever mechanism portion attached to the rotation supporting device and serving as both the rotation lock mechanism and the rotation angle regulation mechanism is rotated in the lock groove and the predetermined rotation angle range. A latch plate having a restriction groove, a lock groove having the lock groove, and a lock lever having a lock pin engageable with the rotation restriction groove are provided, and the lock pin is locked by operating the lock lever by a first-stage external operation. Rotate the lock pin to a position where it does not engage with the lock groove or rotation restriction groove by releasing the engagement with the groove, positioning the lock pin in the rotation restriction groove, and operating it by the second stage external operation. I configured it to
Despite the simple structure, the two-step operation allows both mechanical operations to be performed easily and reliably.
It is possible to exert the above-mentioned effects.

Further, according to the vehicle seat of the present invention, the lock lever includes the rotation restricting lever which is rotationally operated by the first step external operation and the lock release which is rotationally operated by the second step external operation. And a lock groove of the latch plate on a part of the lock release lever.
By providing a lock pin that can be engaged in the rotation restriction groove and activating the rotation restriction lever so that the lock release lever operates in conjunction with each other, the number of components can be minimized. This is advantageous in that the number of the lock lever mechanisms can be reduced, the structure of the lock lever mechanism can be simplified, and the assembling property and the operability of each part can be improved.

[Brief description of drawings]

FIG. 1 shows an embodiment of a vehicle seat according to the present invention,
FIG. 4 is a schematic exploded perspective view showing a lock lever mechanism portion that also serves as a rotation lock mechanism and a rotation angle regulation mechanism, which are essential parts.

FIG. 2 is a schematic plan view for explaining an operating state of a lock lever mechanism section in FIG.

FIG. 3 is a schematic perspective view showing a rotation supporting device provided with a lock lever mechanism portion characterizing the present invention.

FIG. 4 is a schematic plan view of the lock lever mechanism section and the rotation support device shown in FIG.

FIG. 5 is a schematic explanatory view showing a vehicle to which the present invention is applied and which uses a suitable rotary seat as a second seat.

FIG. 6 is a schematic perspective view of a rotary type sheet to which the present invention is applied.

FIG. 7 is a schematic explanatory view when the direction of the second seat is reversed in the vehicle of FIG.

FIG. 8 is a schematic explanatory diagram of a case where a second seat is walk-in operated in the vehicle of FIG.

[Explanation of symbols]

 1 Vehicle 2 Vehicle Floor 5 Second Seat (Rotating Seat) 5A Seat Cushion 5B Seat Back 6 Third Seat 10 Rotation Support Device 11 Rotation Lock Mechanism 12 Seat Rotation Angle Regulation Mechanism 13 Top Board 20 Lock Lever Mechanism 21 Lock Groove 22 Rotation restriction groove 23 Latch plate 24 Lock pin 25 Lock lever 26 Rotation lock release wire 27 Lock plate lever (lock release lever) 27b Stopper locking part 28 Walk-in lever (rotation restriction lever) 28a Engaging claw part 29 Walk-in Operation wire 30 Second latch plate 30a Lock groove 31 Spring 32 First stopper 33 Second stopper

Claims (3)

[Claims] 1. A seat main body comprising a seat cushion and a seat back which is erected on the back side of the seat cushion so as to be tiltable via a reclining mechanism, and a rotation for supporting the seat main body on a floor surface of a passenger compartment in a rotationally adjustable manner. A support device, a rotation lock mechanism attached to the rotation support device to lock the rotation of the seat body at a predetermined position, and a rotation lock mechanism attached to the rotation support device, which interlocks with the seat back of the seat body when the seat back tilts. And a seat rotation angle regulation mechanism that regulates the seat body within a predetermined rotation angle range, and the rotation lock mechanism and the rotation angle regulation mechanism are integrated by a lock lever mechanism section. A vehicle seat, which is attached to a part of the rotation support device. 2. The vehicle seat according to claim 1, wherein the lock lever mechanism portion attached to the rotation support device and serving as a rotation lock mechanism and a rotation angle regulation mechanism has a rotation regulation over a lock groove and a predetermined rotation angle range. A latch plate having a groove; a lock groove of the latch plate; and a lock lever having a lock pin that can be engaged in the rotation restricting groove. By disengaging the lock pin from the lock groove, positioning the lock pin in the rotation restricting groove, and actuating the lock pin by the second-stage external operation, the lock pin is not attached to the lock groove and the rotation restricting groove. A vehicle seat, which is configured to be rotated to a position where it is not engaged. 3. The vehicle seat according to claim 2, wherein the lock lever includes a rotation regulating lever that is rotationally operated by a first stage external operation and a lock release lever that is rotationally operated by a second stage external operation. The lock release lever is provided with a lock groove engageable with the lock groove of the latch plate and the rotation restricting groove, and when the rotation restricting lever is actuated, A vehicle seat characterized in that the lock release lever is configured to rotate in conjunction with each other.