JP4112760B2 - Vehicle flattened seat structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flattened seat structure of a vehicle.
[0002]
[Prior art]
In general, a seat structure for a vehicle is known to have a flat structure in which a seat cushion and a seat back can be leveled at substantially the same height in order to take a rest or sleep, or to use a luggage room widely (similar technology). For example, refer to Japanese Utility Model Publication No. 7-27239).
[0003]
This type of flat structure includes a seat cushion and a seat back that are each rotated and turned horizontally, and the back surface of the seat cushion and the back surface of the seat back are substantially the same height when reversed. In particular, in the case of a seat back, a roller provided at the lower end of the seat back is engaged with the slide rail so that the front and rear positions are reversed without changing greatly, and the intermediate fulcrum of the seat back is slid by the back link. It is connected to the rail or its peripheral members. The roller at the lower end of the seat back is engaged with the lock plate so that the normal use state of the seat back is maintained. Then, when the engagement with the lock plate is released and the roller is slid rearward, the seat back is rotated forward to obtain a horizontal inversion state.
[0004]
[Problems to be solved by the invention]
However, in such a conventional technique, the seat back can be reversed on the spot by using a structure such as a roller, a back link, and a lock plate provided on the seat back. It is used only for inversion and cannot be used for other purposes. For example, a reclining state cannot be obtained by tilting the seat back having such a flattened structure backward. In order to obtain the reclining state, a dedicated reclining mechanism is required, and the seat back support structure is complicated. Moreover, both the flat structure and the reclining mechanism require an operation lever mechanism for controlling the locked state and the released state, respectively, which further complicates the structure and operation.
[0005]
The present invention has been made paying attention to such a conventional technique, and provides a flattened seat structure of a vehicle that can obtain a reclining state with a simple structure and easy operability.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is provided with a seat cushion and a seat back that are respectively rotated and rotated horizontally, and the back surface of the seat cushion and the back surface of the seat back are substantially at the same height when reversed. A roller that protrudes outward in the vehicle width direction is provided on an arm fixed to the lower end of the back, and the roller is engaged with a slide rail fixed to the floor so as to be slidable back and forth, and the roller is attached to the slide rail or its peripheral member. The intermediate support point above the seat back roller and the slide rail or its peripheral members are connected by a back link, and the lock plate is rotated upward to support the seat back. By sliding the rear roller backward, the seat back pivots forward and the vehicle is flattened horizontally. The seat structure has a first engagement portion that engages with a roller of a seat back in a normal use state and a second engagement that engages with a roller of the seat back in a reclining state at a lower edge of the lock plate A pin is provided at a position different from the pivot point, and a lever that engages with the pin of the lock plate from below and pivots the lock plate upward is pivotally supported on the arm. The release operation part at the upper part of the back was connected via an operating force transmission means.
[0007]
According to the first aspect of the present invention, the lever is rotated and the lock plate is lifted upward by operating the release operation portion at the upper part of the seat back, so that both a flat state and a reclining state can be obtained. That is, if the roller is engaged with the second engaging portion, a reclining state is obtained, and if the roller is slid rearward of the slide rail, a flat state is obtained. As described above, both a flat state and a reclining state with completely different movements can be obtained by operating only one lever pivotally supported by the arm, so that the structure of the seat is simple and the operation becomes easy. In addition, since the release operation part is provided on the upper part of the seat back, when the seat back is reclined, the upper part of the seat back is held by hand, preventing the seat back from falling down to the rear side vigorously can do.
[0008]
In the invention described in claim 2, the release operation portion is provided on the back surface of the upper portion of the seat back.
[0009]
According to the invention of claim 2, since the release operation part is provided on the back surface of the upper part of the seat back, compared with the case where the release operation part is provided on the top part or the surface side of the seat back, at the time of the release operation, It is possible to reliably support the back of the seat back from the back side, and it is possible to more sufficiently prevent the seat back from falling down vigorously.
[0010]
According to a third aspect of the present invention, the first engagement portion and the second engagement portion of the lock plate move from the second engagement portion to the first engagement portion while keeping the roller along the lower edge of the lock plate. It can be done.
[0011]
According to the third aspect of the invention, since the roller can move from the second engaging portion to the first engaging portion while maintaining the state along the lower edge of the lock plate, the seat back in the reclining state is merely raised. The seat back automatically returns to the normal use state.
[0012]
In the invention according to claim 4, the seat cushion is rotated from the normal use state to the front side around the front end fulcrum to be in a horizontally inverted state.
[0013]
According to the fourth aspect of the present invention, since the reversing structure of the seat cushion is simply rotated forward about the front end fulcrum, the structure is simple and the reversing operation is easy.
[0014]
According to the fifth aspect of the present invention, a bracket as a peripheral member is connected to the slide rail, and the end portion of the back link is pivotally supported by the bracket.
[0015]
According to the invention described in claim 5, since the end portion of the back link is pivotally supported on the bracket connected to the slide rail, it is necessary to perform processing for pivotally supporting the end portion of the back link on the slide rail. In addition, the manufacture of the slide rail is facilitated and the rigidity of the slide rail can be prevented from being lowered.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. This embodiment shows the flattening structure which concerns on the 3rd row | line 3rd sheet | seat 1 in a wagon vehicle. The third seat 1 is supported by a slide rail 2 and a bracket 3 as a “peripheral member” continuous in front of the slide rail 2. The slide rail 2 and the bracket 3 are fixed to the floor 5 by front and rear legs 4. A pair of slide rails 2 are provided on the left and right, and each has a cross-sectional C shape having an opening along the longitudinal direction on the inner side surface. A luggage room R is formed behind the slide rail 2.
[0017]
The third seat 1 is formed of a seat cushion 6 and a seat back 7. The seat cushion 6 is pivotally supported at a front end fulcrum S <b> 1 whose front end is set at the upper front end of the bracket 3. The rear end portion of the seat cushion 6 is placed on a support (not shown) so that the normal use state with the surface up is reliably maintained. This normal use state is maintained by engaging the hook 8 provided on the seat cushion 6 with the pin 9 of the bracket 3.
[0018]
Then, after holding the hook 8 by hand and rotating it to release the engagement with the pin 9, the rear end portion of the seat cushion 6 is lifted, and the entire seat cushion 6 is rotated forward about the front end fulcrum S1. Then, an inverted state with the back side up is obtained. This inverted state is also supported by a support (not shown). As the reversing structure of the seat cushion 6, the structure is simple and the reversing operation is easy because the seat cushion 6 is simply rotated forward about the front end fulcrum S <b> 1. In the inverted state of the seat cushion 6, the back surface can be lowered forward by a predetermined angle by adjusting a support (not shown). This is to prevent the second seat as a front seat (not shown) from interfering with the seat back when the seat back is in a reclining state.
[0019]
On the other hand, an arm 10 (see FIG. 8) having a U-shaped cross section is fixed to the lower end of the seat back 7. A roller 11 that protrudes outward in the vehicle width direction is provided at the lower end of the arm 10, and the roller 11 is engaged with the slide rail 2 so as to be slidable forward and backward.
[0020]
A lever 12 is pivotally supported on the arm 10. The lever 12 is pivotally supported by a rear end shaft 13, and a spring 14 (see FIG. 8) that urges the lever 12 downward is provided on the rear end shaft 13. A pin 15 is provided at the upper end of the lever 14, and the pin 15 contacts the upper edge of the arm 10 and is connected to the lower end of the wire 16 as “operation force transmitting means”. An inclined portion 12 s is formed at the tip of the lever 12.
[0021]
The upper end of the wire 16 is connected to a release operation unit 17 provided on the upper back surface of the seat back 7. The release operation part 17 is provided so as to be rotatable up and down inside a recess formed on the back surface, and is urged downward by a spring (not shown). Therefore, the wire 16 is pushed downward by this urging force, and the lever 12 is maintained in a state where the pin 15 is pushed against the upper edge of the arm 10 by the urging force of the spring 14.
[0022]
Next, an intermediate fulcrum S <b> 2 is set at an intermediate portion of the seat back 7, and the intermediate fulcrum S <b> 2 and the bracket 3 are connected by a back link 18. Since the end portion of the back link 18 is pivotally supported by a bracket 3 that is different from the slide rail 2, there is no need to process the slide rail 2 to pivot them, and the slide rail 2 can be easily manufactured. In addition, it is possible to prevent the slide rail 2 from being lowered in rigidity.
[0023]
A lock plate 20 that is rotatable about a front end shaft 19 is attached to the front end portion of the slide rail 2. The lock plate 20 has a substantially L shape having a portion extending rearward from the front end shaft 19 and a portion extending downward. A spring 21 is provided between the lock plate 20 and the bracket 3 to urge the lock plate 20 downward. A first engaging portion 20a and a second engaging portion 20b are recessed in the lower edge of the portion extending rearward of the lock plate 20, respectively. The rollers 11 provided on the arm 10 can be engaged with the first engaging portion 20a and the second engaging portion 20b, respectively. Since the first engaging portion 20a and the second engaging portion 20b are respectively provided so as to be recessed obliquely rearward, the forward movement of the engaged roller 11 is restricted, but the lower edge of the roller 11 is restricted. A backward movement along is possible. Further, a pin 22 is formed between the first engagement portion 20 a and the second engagement portion 20 b of the lock plate 20, and this pin 22 is engaged with the upper edge of the lever 12.
[0024]
When the roller 11 of the seat back 7 is engaged with the first engagement portion 20a of the lock plate 20, the seat back 7 is in a normal use state standing up at a predetermined angle, and the second engagement portion In the state engaged with 20b, the seat back 7 is in a reclining state largely inclined backward. In the lock plate 20, the first engaging portion 20a is formed as usual, but the second engaging portion 20b for obtaining the reclining state is also formed on the lock plate 20 in the conventional manner. I don't know an example.
[0025]
Next, each form of the third sheet 1 according to this embodiment will be described in order.
[0026]
Normal use condition (Fig. 1):
When the roller 11 of the seat back 7 is engaged with the first engaging portion 20a of the lock plate 20 (see FIG. 4), the seat back 7 is in a normal use state in which it stands up at a predetermined angle. Moreover, the passenger | crew can be seated on the 3rd seat 1 with a normal attitude | position in the normal use state which turned the surface of the seat cushion 6 upward.
[0027]
Reclining state (Figure 2):
When the wire 16 is pulled by the release operation portion 17 provided on the back surface of the seat back 7 and the lever 12 is rotated upward, the lock plate 20 is lifted upward, so that the roller 11 and the first engagement portion 20a The engagement is released (see FIG. 5). Therefore, this time, by engaging the roller 11 toward the second engagement portion 20b (see FIG. 6), the reclining state in which the seat back 7 is largely inclined rearward can be achieved. Thus, since the reclining state of the seat back 7 can be obtained by forming the second engagement portion 20b on the existing lock plate 20, a dedicated reclining mechanism is not required, and the support structure of the seat back 7 is simplified. it can.
[0028]
Further, when operating the release operation portion 17 on the back surface of the seat back 7, since the upper portion of the seat back 7 is supported from the back side by the occupant's hand, the seat back 7 does not fall down vigorously due to its own weight, It can be slowly reclining while being supported by hand.
[0029]
In addition, when returning the roller 11 from the 2nd engaging part 20b to the 1st engaging part 20a, since the 2nd engaging part 20b is formed diagonally toward the front side, it only raises the seat back 7 by hand. Thus, the roller 11 is guided and moved by the inclined lower edge of the second engagement portion 20b (see FIG. 7), and automatically engages in the first engagement portion 20a. Therefore, the operation for returning from the reclining state to the normal state is easy.
[0030]
Inverted state (Figure 3):
The same operation as in the case of reclining is performed until the wire 16 is pulled by the release operation portion 17 provided on the back surface of the seat back 7 and the lever 12 is rotated upward to lift the lock plate 20 upward. Thereafter, when the roller 11 is moved rearward to the rear end position of the slide rail 2, the seat back 7 is horizontally reversed. The seat cushion 6 is rotated by holding the hook 8 by hand and releasing the engagement between the hook 8 and the pin 9 and then lifting the rear end of the seat cushion 6 to If the front end fulcrum S1 is rotated to the front side, an inverted state with the back side up is obtained. By doing in this way, the back surface of the seat back 7 and the back surface of the seat cushion 6 become substantially the same height, and the occupant lies straight on the third seat 1 as in the reclining state. Or, since the luggage room R is in an expanded state, more luggage can be loaded. When returning from the inverted state, since the inclined portion 12s is formed at the tip of the lever 12, the pin 22 of the lock plate 20 can be guided to the upper edge of the lever 12 to return to the original state.
[0031]
【The invention's effect】
According to the first aspect of the present invention, the lever is rotated and the lock plate is lifted upward by operating the release operation portion at the upper part of the seat back, so that both a flat state and a reclining state can be obtained. That is, if the roller is engaged with the second engaging portion, a reclining state is obtained, and if the roller is slid rearward of the slide rail, a flat state is obtained. As described above, both a flat state and a reclining state with completely different movements can be obtained by operating only one lever pivotally supported by the arm, so that the structure of the seat is simple and the operation becomes easy. In addition, since the release operation part is provided on the upper part of the seat back, when the seat back is reclined, the upper part of the seat back is held by hand, preventing the seat back from falling down to the rear side vigorously can do.
[0032]
According to the invention of claim 2, since the release operation part is provided on the back surface of the upper part of the seat back, compared with the case where the release operation part is provided on the top part or the surface side of the seat back, at the time of the release operation, It is possible to reliably support the back of the seat back from the back side, and it is possible to more sufficiently prevent the seat back from falling down vigorously.
[0033]
According to the third aspect of the invention, since the roller can move from the second engaging portion to the first engaging portion while maintaining the state along the lower edge of the lock plate, the seat back in the reclining state is merely raised. The seat back automatically returns to the normal use state.
[0034]
According to the fourth aspect of the present invention, since the reversing structure of the seat cushion is simply rotated forward about the front end fulcrum, the structure is simple and the reversing operation is easy.
[0035]
According to the invention described in claim 5, since the end portion of the back link is pivotally supported on the bracket connected to the slide rail, it is necessary to perform processing for pivotally supporting the end portion of the back link on the slide rail. In addition, the manufacture of the slide rail is facilitated and the rigidity of the slide rail can be prevented from being lowered.
[Brief description of the drawings]
FIG. 1 is a side view showing a normal use state of a third seat according to an embodiment of the present invention.
FIG. 2 is a side view showing a reclining state.
FIG. 3 is a side view showing an inverted state.
FIG. 4 is a side view showing the periphery of a lock plate in a normal use state.
FIG. 5 is a side view showing a state where the lock plate is lifted up.
FIG. 6 is a side view showing a state in which a roller is engaged with a second engagement portion.
FIG. 7 is a side view showing a state in which the roller moves toward the first engagement portion along the lower edge of the lock plate.
FIG. 8 is a cross-sectional view showing a structure around a lock plate.
[Explanation of symbols]
1 Third seat 2 Slide rail 3 Bracket (peripheral member)
6 Seat cushion 7 Seat back 10 Arm 11 Roller 12 Lever 16 Wire (operation force transmission means)
17 Release operation portion 18 Back link 20 Lock plate 20a First engagement portion 20b Second engagement portion S1 Front end fulcrum S2 Intermediate fulcrum R Luggage room

Claims (5)

Each is equipped with a seat cushion and a seat back that turn and rotate horizontally, and the back surface of the seat cushion and the back surface of the seat back are approximately the same height when reversing.
The arm fixed to the lower end of the seat back is provided with a roller that protrudes outward in the vehicle width direction, and the roller is engaged with the slide rail fixed to the floor so as to be slidable back and forth. A lock plate that engages with the roller is pivotally supported, and an intermediate fulcrum above the roller of the seat back and the slide rail or its peripheral member are connected by a back link, and the lock plate is rotated upward so that the seat By sliding the back roller backward, the seat back turns to the front side and is a flattened seat structure of the vehicle that is in a horizontally inverted state,
The lower edge of the lock plate is provided with a first engaging portion that engages with a seat back roller in a normal use state, and a second engagement that engages with a seat back roller in a reclining state, and a pivot point A pin is provided at a position different from
A lever that engages with a pin of the lock plate from below and pivots the lock plate upward is pivotally supported on the arm, and the lever and a release operation portion at the upper part of the seat back are connected via an operation force transmitting means. A flattened seat structure of a vehicle characterized by being connected. The flattened seat structure for a vehicle according to claim 1,
A flattened seat structure for a vehicle, wherein a release operation portion is provided on a back surface of an upper portion of the seat back. The flattened sheet structure according to claim 1 or 2,
The first engagement portion and the second engagement portion of the lock plate can move the roller from the second engagement portion to the first engagement portion while keeping the roller along the lower edge of the lock plate. The flattened seat structure of the vehicle characterized by the above. The flattened seat structure for a vehicle according to any one of claims 1 to 3,
A flattened seat structure for a vehicle, wherein the seat cushion is rotated from the normal use state to the front side about a front end fulcrum to be in a horizontally inverted state. The flattened seat structure for a vehicle according to any one of claims 1 to 4,
A flattened seat structure for a vehicle, wherein a bracket as a peripheral member is connected to the slide rail, and an end portion of a back link is pivotally supported on the bracket.

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