JP3701104B2 - Seating direction reversing seat device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seating direction reversing seat device capable of setting and changing a seating direction of a user in two opposite directions, for example, both front and rear directions, in various vehicles.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a seating direction reversing seat device that can be seated not only forward but also backward for the purpose of sitting in a wagon car, bus, train, or the like.
[0003]
In the seating direction reversing seat device, for example, a rotating mechanism is provided at the lower part of the seat cushion to rotate the entire seat horizontally, or the seat back is moved from the front and rear one end side to the other end side of the seat cushion to reverse Some of them are leaned to the side, or the seat back is tilted to be substantially horizontal and used as a seat cushion, and the seat cushion is raised and used as a seat back.
[0004]
[Problems to be solved by the invention]
However, a device provided with a rotation mechanism at the lower part of the seat cushion has to secure a rotation space for the seat and requires a relatively large installation space. In addition, the structure is relatively easy to ensure if the seat back is only tilted, but moving the seat back from one end to the other end of the seat cushion greatly moves the seat back, Not only the structure becomes complicated, but also the apparatus becomes larger and heavier in order to ensure strength and rigidity. In addition, the seat back is tilted to form a seat cushion, and the seat cushion is raised to form the seat back, although the structure is simple, the length (depth) of the seat back is larger than that of the seat cushion. The seat becomes difficult to sit on.
[0005]
The present invention has been made in view of the problems of the prior art as described above, and its main purpose is that it has a simple structure and does not require a wide installation space, and the apparatus does not increase in size and weight. In addition, an object of the present invention is to provide a seating direction reversing seat device that does not impair the sitting comfort.
[0006]
[Means for Solving the Problems]
According to the present invention, the above-described object is a seating direction reversing seat device that can be set in two directions opposite to the seating direction of the user, and tilts between a substantially horizontal position and a vertical position around the base end. A seat back portion that is supported, a link arm that is supported coaxially with a tilting center of the seat back portion or tilted about the back side or the lower side of the seat back portion that stands upright, and the link A seat cushion portion supported by the free end of the arm so as to be tiltable, a first seating state in which the seat cushion portion is substantially horizontal and the seat back portion is upright; and the seat back portion is substantially Make the seat cushion part horizontal and function as a seat cushion part, and tilt the seat cushion part together with the link arm, and position the base end of the seat cushion part on the seat back part. Further, the seat cushion part can be slightly tilted in the direction opposite to the tilting direction centered on the base end thereof and can take a second seating state in which the seat cushion part functions as a seat back part. This is achieved by providing a seating direction reversing seat device characterized in that the tilting of each part and the link arm is restricted by a locking means.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail based on specific embodiments shown in the accompanying drawings.
[0008]
FIG. 1 shows a schematic structure of a vehicle seat device to which the present invention is applied. The base 1 is provided with a recliner device 2. The recliner device 2 includes a fixed portion 3, a first movable portion 4 pivotally supported by the fixed portion 3 about a pivot 6, and a fixed portion 3 that can also be pivoted about the pivot 6. And a link arm 5 as a second movable part pivotally supported by the arm. A seat back portion 7 is attached to the first movable portion 4. Accordingly, the seat back portion 7 is based on the pivot 6 of the recliner device 2 so as to be tiltable between a vertical position and a substantially horizontal position, or as required, to a forward tilted (falling counterclockwise in FIG. 1) position. It will be pivotally supported by 1. The locking means for holding the seat back portion 7 at each position has a latch structure similar to that of the conventional recliner, for example, and therefore detailed description thereof is omitted.
[0009]
On the other hand, the seat cushion portion 8 is pivotally supported by the link arm 5 so as to be tiltable about the pivot shaft 5a. Accordingly, the seat cushion portion 8 is pivotally supported by the base 1 so as to be tiltable about the pivot 6 of the recliner device 2 via the link arm 5 and is also pivotably supported by the link arm 5. It will be.
[0010]
Here, the link arm 5 is provided with a pin 5b that engages with the guide groove 1a of the base 1, and the pin 5b abuts against the end of the guide groove 1a to define the tilting range of the link arm 5. are doing. Engaging claw members 10 and 11 are provided at both ends of the guide groove 1a as locking means for engaging the pin 5b and holding the seat cushion portion 8 in a substantially horizontal state and an upright state. . The engaging claw members 10 and 11 are urged in a direction to engage with the pin 5b by a spring (not shown). Further, the engagement claw members 10 and 11 are connected to the engagement release lever 15 via connection wires 13 and 14. By pulling up and rotating the engagement release lever 15 in the direction of the arrow, the engagement claw members 10 and 11 are driven in a direction away from the pin 5b, and the engagement with the pin 5b is selectively released to link arm. 5 can be tilted.
[0011]
As shown well in FIG. 2, the pin 17 attached to the seat cushion portion 8 so as to be able to protrude and retract toward the side and spring-biased in the protruding direction is one of the engagement holes 5 c, 5 d, 5 e of the link arm 5. The lock means is configured by engaging with the hook. The pin 17 is connected to a rotating plate 20 that is rotatably attached to the seat cushion portion 8 via a connecting wire 18. The rotating plate 20 is connected to an engagement release knob 23 via a connecting wire 22. Then, by pulling the disengagement knob 23 in the direction of the arrow in FIG. 2, the rotating plate 20 is rotated via the connecting wire 22, and the pin 17 is immersed via the connecting wire 18, and the engaging holes 5 c, The engagement with any one of 5 d and 5 e is released, and the seat cushion portion 8 can be tilted with respect to the link arm 5.
[0012]
Below, with reference to FIGS. 1-4, the operation | movement point of the said vehicle seat apparatus is demonstrated. First, in the state shown in FIG. 1, that is, in the first seating state where the seat cushion portion 8 is in a substantially horizontal position and the seat back portion 7 is upright, the pin 5 b of the link arm 5 is engaged with the engaging claw member 10. Yes. Further, the pin 17 is engaged with the engagement hole 5 c of the link arm 5. In the following description, it is assumed that the user is seated so as to face forward in this state, but in actuality, it may be seated so as to face either rear or left and right in this state.
[0013]
In this state, the headrest is pulled out from the upper end of the seat back part 7, the seat back part 7 is tilted as shown by an arrow A to be substantially horizontal, and the engagement release lever 15 is pulled up to engage the engagement claw member 10 and the pin 5b. The engagement is released, and the link arm 5 and the seat cushion portion 8 are tilted as indicated by the arrow B to bring the link arm 5 and the seat cushion portion 8 upright (broken line in FIG. 3). Then, the pin 5b engages with the engaging claw member 11, and the link arm 5 is fixed. In this state, the base end of the seat cushion portion 8 is the upper portion of the seat back portion 7 and is located closer to the rear than the pivot 6 of the recliner device 2, that is, closer to the free end of the substantially horizontal seat back portion 7. Thereby, the depth of the seat back part 7 can be shortened.
[0014]
Next, the engagement release knob 23 is pulled to release the engagement between the pin 17 and the engagement hole 5c, the seat cushion portion 8 is tilted with respect to the link arm 5 in the direction indicated by the arrow C, and the pin 17 is engaged. The seat cushion 8 is fixed by engaging with the joint hole 5d (solid line in FIG. 3). Thereby, the seat back part 7 functions as a seat cushion, the seat cushion part 8 functions as a seat back, and is in a second seating state in which it is seated in a direction opposite to the first seating state, that is, facing backward. . Actually, the slider 1b at the bottom of the base 1 can be moved in the front-rear direction on a fixed rail (not shown) so that the front-rear position can be adjusted.
[0015]
In order to return from the second seating state to the first seating state, a procedure reverse to the above procedure may be performed. That is, the engagement between the pin 17 and the engagement hole 5d is released, the seat cushion portion 8 is tilted with respect to the link arm 5 in the direction opposite to the arrow C, and the pin 17 is engaged with the engagement hole 5c. The engagement between the pawl member 11 and the pin 5b is released, and the link arm 5 and the seat cushion portion 8 are tilted in the direction opposite to the arrow B to make the seat cushion portion 8 substantially horizontal. Then, the seat back portion 7 may be tilted in the direction opposite to the arrow A and upright.
[0016]
The above-described vehicle seat device can also take a third state, which is a so-called full flat seat, when only the seat back portion 7 is substantially horizontal. Further, the engagement between the pin 17 and the engagement hole 5c is released from the first seating state shown in FIG. 1, the seat cushion portion 8 is tilted in the direction of arrow D with respect to the link arm 5, and the pin 17 is engaged. When engaged with the joint hole 5e, the seat back portion 7 and the seat cushion portion 8 are both brought to the upright state (FIG. 4). In this state, the seating space can be used as a loading space or a passage space by moving the seat device forward or backward, and cleaning under the seat is facilitated.
[0017]
Reference numeral 25 denotes a hook used to suspend a bag or the like as desired with the seat cushion portion 8 upright.
[0018]
FIG. 5 shows a modified example of the above-described embodiment. The same reference numerals are given to the same parts as those in the above-described sheet apparatus, and the detailed description thereof is omitted. In this configuration, the link arm 35 is pivotally supported by the pivot 36 on the back side of the seat back portion 7 that is closer to the rear than the pivot 6 of the recliner device 2, that is, upright. Accordingly, in the second seating state (FIG. 6) in which the seat cushion portion 8 is upright and the seat back portion 7 is substantially horizontal, the depth of the seat back portion 7 that functions as a seat cushion is further shortened compared to the above configuration. It becomes possible to do. The imaginary line in FIG. 6 is the position of the seat cushion portion 8 in the second seating state of the above configuration. In practice, even if the link arm 35 is pivotally supported below the pivot 6 of the recliner device 2, the depth of the seat back portion 7 in the second seating state can be shortened. Other configurations are the same as those in the above embodiment.
[0019]
【The invention's effect】
As is apparent from the above description, the first seating state in which the seat cushion portion is substantially horizontal and the seat back portion is uprighted, and the seat back portion is substantially horizontal to function as the seat cushion portion, and the link arm The seat cushion part is tilted through the seat, and the seat cushion part is brought upright, the base end of the seat cushion part is positioned on the seat back part, and the seat cushion part is opposite to the tilting direction around the base end with respect to the link arm. The seat cushion depth in the second seating state can be set to a desired depth by allowing the seating portion to be tilted slightly in the direction so as to function as a seat back portion, and to improve the sitting comfort. It is possible to change the setting of the user's seating direction in two opposite directions, for example, the front and rear two directions without any loss, and a wide installation space. The not required, also devices nor the size of and weight reduction. In addition, since both the seat cushion portion and the seat back portion can be upright, it is easy to secure a luggage space and a passage, and it is easy to clean the floor surface and the like.
[Brief description of the drawings]
FIG. 1 is a side view showing a schematic structure of a vehicle seat device to which the present invention is applied.
FIG. 2 is a plan view of the seat device of FIG. 1 as viewed from above.
FIG. 3 is a side view showing an operation procedure of the seat device of FIG. 1;
4 is a side view showing an operation procedure of the seat apparatus of FIG. 1 together with FIG. 3;
FIG. 5 is a view similar to FIG. 1 showing a modified example of the vehicle seat device to which the present invention is applied.
6 is a view similar to FIG. 3 showing the operating procedure of the seat device of FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 1a Guide groove 1b Slider 2 Recliner apparatus 3 Fixed part 4 First movable part 5 Link arm 5a Pivot 5b Pin 5c, 5d, 5e Engagement hole 6 Pivot 7 Seat back part 8 Seat cushion part 10, 11 Engagement claw Members 13 and 14 Connection wire 15 Disengagement lever 17 Pin 18 Connection wire 20 Rotating plate 22 Connection wire 23 Disengagement knob 25 Hook 35 Link arm 36 Axis

Claims (3)

A seating direction reversing seat device that can be set in two directions opposite to the seating direction of the user,
A seat back portion supported so as to be tiltable between a substantially horizontal position and a vertical position around the base end;
A link arm that is supported coaxially with the tilt center of the seat back part or tiltable about the back side or the lower side of the seat back part that is upright; and
A seat cushion portion that is tiltably supported at the free end of the link arm,
A first seating state in which the seat cushion portion is substantially horizontal and the seat back portion is upright; and the seat cushion portion is functioned as a seat cushion portion with the seat back portion being substantially horizontal; and the seat cushion portion together with the link arm The seat cushion portion is caused to stand upright, the seat cushion portion base end is positioned on the seat back portion, and the seat cushion portion is tilted slightly in the direction opposite to the tilt direction around the base end. The second seating state to function as can be taken,
A seating direction reversing seat device characterized in that in each state, the tilting of each part and the link arm is restricted by a locking means. The third state where both the seat cushion part and the seat back part are substantially horizontal and / or the fourth state where both the seat cushion part and the seat back part are upright can be taken. The seating direction reversing seat device according to claim 1. Means for guiding the tilting of the link arm at a position separated from the tilting center of the link arm;
The seating direction reversing seat device according to claim 1 or 2, wherein the guide means is provided with the lock means for restricting tilting of the link arm.

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