JP2004025969A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle seat capable of setting a back frame in at least two operating positions without losing a comfortable sitting feeling, in a structure where a net member are temporarily constructed over the back frame and a cushion frame. <P>SOLUTION: In the structure where the net member is suspended from between the front end frame section of the cushion frame and the upper end frame section of the back frame to form a sitting surface, a length changing means of changing a lengthwise length of the net member is provided. The lengthwise length of the net member can be changed by the length changing means, therefore the net member can be maintained in such a condition that it is tensed at either of two operating positions (a normally operating position and a fully reclining position). Thus, the back frame can be changed to at least the two operating positions without the losing of the comfortable sitting feeling even in the structure where the net member is suspended over the back frame and the cushion frame. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle seat, and more particularly to a vehicle seat capable of expanding a luggage space by folding.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a foldable seat that can be folded by rotating a seat back forward so as to expand a luggage space when a large amount of luggage is loaded is known.
[0003]
In particular, Japanese Patent Application Laid-Open No. 2002-17495 and Japanese Patent Application Laid-Open No. 2002-45258 disclose a thinner folded state. In this conventional technique, during normal use, the front end of the seat frame is lifted up to create a moderate forward rising state, while when not in use, the front end of the seat frame is lifted down to form a thin folded state. It is supposed to be. In addition, in this conventional example, since the net member is used instead of the urethane cushion material, it is possible to further thin the folded state.
[0004]
[Problems to be solved by the invention]
However, in this type of vehicle seat, if one net member is provided over the back frame and the seat frame, it is difficult to further recline the back frame from the normal use position. In the case of further reclining, it is conceivable that the net member is used in a relaxed state at the normal use position in advance, but there is a possibility that a suitable sitting feeling may be impaired.
[0005]
The present invention has been made based on such a conventional technique, and in a structure in which one net member is laid across the back frame and the seat frame, at least the back frame is not damaged without deteriorating a suitable seating feeling. It is an object of the present invention to provide a vehicle seat that can be changed between two use positions.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, the seat frame is suspended between the seat frame, the back frame, and the front frame portion of the seat frame and the upper frame portion of the back frame. A net member, and tension means for preventing the net member from being loosened by pulling the net member rearward at the seating surface of the seating surface and the dividing line portion on the back surface,
The back frame is rotatably supported over at least two use positions, and a length changing means for changing the length of the net member in the longitudinal direction is provided.
[0007]
In this case, since the longitudinal length of the net member can be changed by the variable length means, the net member can be stretched at any one of the two use positions without relaxing the net member at any one of the use positions. Can be maintained in a suspended state. Accordingly, even in a structure in which one net member is laid across the back frame and the seat frame, the back frame can be changed to at least two use positions without impairing a suitable seating feeling.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of a vehicle seat according to the present invention will be described in detail with reference to the accompanying drawings.
[0009]
1 is an exploded perspective view of the vehicle seat of this embodiment, FIG. 2 is a perspective view showing a normal use position (use position) of the vehicle seat, and FIG. 3 is a full flat position (use position) of the vehicle seat. FIG. 4 is a perspective view showing the folded position of the vehicle seat, FIG. 5 is a schematic view illustrating the operation of the variable length means of the net member, and FIG. 6 is a schematic view illustrating the operation of the locking means. is there.
[0010]
The vehicle seat 1 of this embodiment is a so-called net seat in which a net member 4 forms a seating surface. Specifically, a back frame 2, a seat frame 3, and an upper end frame 31a of the back frame 2 are provided. And a net member 4 which is provided between the front end frame portion 6a of the seat frame 3 and a seating surface.
[0011]
"Seat frame"
First, the seat frame 3 will be described. In this embodiment, the front of the seat frame 3 is configured to be freely lifted up and down. This will be described in more detail below.
[0012]
The seat frame 3 includes a main pipe 6 and brackets 7 and 8. The main pipe 6 is formed in a substantially rectangular shape by a front end frame 6a, a pair of left and right side frame portions 6b, 6b, and a rear end frame portion 6c. On the other hand, the brackets 7, 8 are formed along the rear end shapes of the side frames 6b, 6b of the main pipe 6, and are fixed by welding to the rear ends of the side frames 6b, 6b.
[0013]
On the floor near the rear end of the seat frame 3, first base members 9, 10 are fixed on the inner side and the outer side. The first base members 9 and 10 include bottom plate portions 9a and 10a fixed to the floor, and hinge portions 9b and 10b for a seat frame formed to rise from side edges of the rear terminals of the bottom plate portions 9a and 10a. It has. Bolts 11 and 12 as hinge shafts fixed to the screw holes 7a and 8a at the lower ends of the brackets 7 and 8 of the seat frame 3 are inserted into the free hinge holes 9c and 10c of the seat frame hinges 9b and 10b. Is inserted, so that the front end of the seat frame 3 can be lifted up and down around the hinge holes 9c and 10c.
[0014]
Further, a hinge portion 9d for a back frame, which will be described later, is formed on the inner side first base member 9 in front of the seat frame hinge portion 9b, while the outer side first base member 10 is formed. On the front side of the seat frame hinge 10b, a bracket 10d for fixing a back frame reclining device 36 to be described later is formed upright.
[0015]
On the other hand, a pair of left and right second base members 13 is fixed to the floor near the front end of the seat frame 3. The second base members 13, 13 include bottom plate portions 13a, 13a fixed to the floor, and side plate portions 13b, 13b rising from side edges of the bottom plate portions 13a, 13a. One end (the lower end in use) of the rotating arms 14, 14 is rotatably supported by the caulking pins 15, 15 on the side plates 13 b, 13 b, whereby the other end (the upper end in use) of the rotating arms 14, 14. Are configured as free ends. A pipe member 20 as a reinforcing member is welded and fixed between the rotary arms 14 and 14. Pins 17, 17 are fixed to the bosses 16, 16 at the free ends (upper ends) of the rotating arms 14, 14, and the pins 17, 17 are attached to the front portions of the side frame portions 6b, 6b of the seat frame 3. The rail members 18, 18 are fixed to the long holes 19, 19, respectively.
[0016]
The long hole 19 is provided along the longitudinal direction of the side frame portion 6b, and the pin 17 is located at the rear edge of the long hole 19 when the rotary arm 14 is folded horizontally. When the rotating arm 14 is rotated vertically from the folded state, the long holes 19 act to lift up the front end of the seat frame 3 while slidingly guiding the pins 17. Further, the seat frame 3 is set to be in the use position when the pin 17 is located at the front edge of the elongated hole 19.
[0017]
Here, locking means for holding the seat frame 3 in the use position (normal use state and full reclining state) is provided. The locking means includes a hinge pin 23 pivotally supported by a hinge hole 22 formed at a position forward of the elongated hole 19 of the rail member 18, a lock plate 24 having an intermediate portion fixed to one end of the hinge pin 23, A spring member 25 for urging the front end of the plate 24 downward, that is, urging the rear end of the lock plate 24 upward. A lock claw 26 is provided at the rear end of the lock plate 24 so as to protrude upward at a position where the lock claw interferes with the front end of the elongated hole 19. The rear end surface 26a of the lock claw 26 allows the lock plate 24 to rotate around the hinge pin 23 when the pin 17 moves to the front end edge of the long hole 19 as shown in FIG. On the other hand, the front end surface 26b of the lock claw 26 is formed as an engaging portion that sandwiches a pin between the front end surface 26b of the elongated hole 19 and the front end surface 26b of the lock claw 26.
[0018]
Thus, when the seat frame 3 is moved from the non-use position (folded position) to the use position when the seat frame 3 is moved to the predetermined use position, the pin 17 at the free end of the rotating arm 14 locks the lock plate 24. By being locked between the claw 26 and the front edge 19a of the elongated hole 19, the seat frame 3 is locked at a predetermined use position.
[0019]
An operation lever 27 is fixed to the other end of the hinge pin 23, and the operation of the operation lever 27 rotates the lock plate 26 around the hinge pin 23, thereby unlocking the pin 23 by the lock plate 26. I can do it.
[0020]
"Back frame"
Next, the back frame will be described. As shown in FIG. 1, the back frame 2 includes a main pipe 31 formed in an inverted U shape from an upper frame 31a and side frames 31b, 31b, and lower ends of the side frames 31b, 31b of the main pipe 31. And a linear lower pipe 33 connected and fixed between the side frame portions 31b, 31b of the main pipe 31 via the brackets 32, 33 to reinforce the main pipe 31. Have been.
[0021]
A bolt 34 as a hinge shaft is fixed to the lower end of the inner bracket 32 of the back frame 2, and the bolt 34 is pivotally supported by the free hinge hole 9 e of the hinge 9 b of the first base member 9 on the inner side. ing. On the other hand, the outer bracket 33 of the back frame 2 is rotatably supported by the outer first base member 10 via a reclining device 36 described later.
[0022]
The reclining vise 36 includes a fixing member 36a and a rotating member 36b as shown in FIG. The fixing member 36a is fixed to the bracket portion 10d of the first base 10 by caulking pins 37, 37, 37, while the rotating member 36b is fixed to the bracket 33 by bolts 38, 38. The reclining device 36 is provided with a well-known locking mechanism (not shown) between the fixed member 36a and the rotating member 36b. The locking mechanism allows the back frame 2 to be moved to the normal use position (FIG. 2) and to the full reclining position. It can be locked in two positions (FIG. 3). The lock mechanism can be unlocked in accordance with the rotation of the operation lever 39.
[0023]
"Net material"
Next, the net member will be described. As described above, the net member 4 is provided between the upper end frame portion 31a of the back frame 2 and the front end frame portion 6a of the seat frame 3 to form a seating surface.
[0024]
More specifically, one end (upper end) 41 of the net member 4 is folded back to the back side of the back frame 2 so as to enclose a substantially cylindrical cushion member 28 made of chip urethane attached to the upper frame 31 a of the back frame 2. Then, the J-shaped hook 43 fixed to the terminal of the one end portion 41 is locked to the round bar-shaped hook portion 44 fixed to the back frame 2. On the other hand, the other end (front end) 42 of the net member 4 is folded back to the back side of the seat frame 2 so as to entrain the cylindrical cushion member 29 made of chip urethane attached to the front end frame 6 a of the seat frame 3. Then, the J-shaped hook 45 fixed to the terminal at the other end portion 42 is locked to the round bar-shaped hook portion 46 fixed to the seat frame 2.
[0025]
In this embodiment, the longitudinal length of the seating surface of the net member 4 is set shorter than the sum of the longitudinal length of the back frame 2 and the longitudinal length of the seat frame 3, and the net member 4 is 2 is not connected to the side frame portions 31b, 31b and the side frame portions 6b, 6b of the seat frame 3, and the net member 4 is suspended from the back frame 2 and the seat frame 3 and is erected. I have. In such a configuration, the net member 4 may be loosened, but in this embodiment, there is provided a pulling means for pulling the dividing line portion 4c which divides the seating surface into the seating surface 4a and the back surface 4b backward. As a result, the slack of the net member 4 can be prevented. More specifically, the tension means is constituted by coil springs 47, 47, 47. One end of each of the coil springs 47, 47, 47 is engaged with a round bar 48 held inside a bag portion 49 connected to the back side of the dividing line portion 4c. The other end is welded to the lower pipe 34, and the coil springs 47, 47, 47 are stretched between the round bar 48 and the lower pipe 38.
[0026]
When the longitudinal length of the seating surface of the net member 4 is set to be shorter than the sum of the longitudinal length of the back frame 2 and the longitudinal length of the seat frame 2 as described above, The length of the net member 4 poses a problem in turning to the two use positions (the normal use position and the full reclining position). In this embodiment, however, the length of the net member 4 in the longitudinal direction can be changed. With the provision of the long means, the net member 4 can be installed without loosening at any of the normal use position and the full reclining position of the back frame 2.
[0027]
As shown in FIG. 5, the length changing means includes cloth fixing portions 52, 52 fixed at predetermined intervals in the longitudinal direction of the net member 4, and provided at the tips of the fixing portions 52, 52. It is constituted by a fastener 50 having freely connectable connecting portions 51, 51, and the length of the net member 4 in the longitudinal direction can be changed by opening and closing the fastener 50. That is, when the fastener 50 is opened, the entire net member 4 can be used. On the other hand, when the fastener 50 is closed, a predetermined portion of the net member 4 is folded in a tuft shape, so that the net member 4 has a predetermined length. Can be shortened. Accordingly, regardless of whether the back frame 2 is located at the normal use position or the full reclining position, the net member 4 can be maintained in a suitable stretched state without being relaxed.
[0028]
Here, in this embodiment, the two terminals 50a, 50a are connected by a rubber string member 53 on the back side of the net member 4 so that the two terminals of the fastener 50 do not hang loosely. In addition, the code | symbol 35 in a figure is a backboard, The code | symbol 54 is a reinforcement patch.
[0029]
The vehicle seat 1 of the present embodiment having such a configuration is used as follows.
[0030]
Folded state (Fig. 4) → normal use state (Fig. 2)
To change from the folded state (FIG. 4) to the normal use state (FIG. 2), first, the seat frame 2 in the folded position is pulled up to the use position. At this time, the pin 17 at the free end of the rotary arm 14 moves the elongated hole 19 from the rear end to the front end, and the pin 17 is locked by the lock plate 24 at the front edge 19 a of the elongated hole 19. Next, the back frame 2 is raised, and the back frame 2 is locked in the normal use position by the lock mechanism of the reclining device 36, so that the vehicle seat 1 shown in FIG.
[0031]
Normal use state (Fig. 2) → full recline state (Fig. 4)
To change from the normal use state (FIG. 2) to the full recline state (FIG. 4), first, the fastener 50 as the length changing means is opened to relax the net member 4 in the longitudinal direction. Next, after unlocking the lock mechanism of the reclining device 36 by the operation lever 39, the back frame 2 is tilted backward until the locking mechanism of the reclining device 36 is locked at the full reclining position, and the vehicle seat 1 shown in FIG. Full reclining state.
[0032]
Full reclining state (Fig. 4) → normal use state (Fig. 2)
To change from the full reclining state (FIG. 4) to the normal use state (FIG. 2), first, the lock mechanism of the reclining device 36 is unlocked by the operation lever 39, and then the lock mechanism of the reclining device 36 is released at the normal use position. Raise the back frame 2 until it locks. Next, by closing the fastener 50 of the net member 4 which is relaxed in the longitudinal direction, a seating surface which is required to be in a tensioned state is created, and the vehicle seat 1 shown in FIG.
[0033]
Normal use state (Fig. 2) → folded state (Fig. 4)
To change from the normal use state (FIG. 2) to the folded state (FIG. 4), first, the lock of the pin is released by the operation lever 27 by the lock plate 24, and the seat frame 2 is folded from the normal use position. Next, the lock of the reclining device 36 is released by the operation lever 39, and the back frame 2 is folded from the normal use position to bring the vehicle seat 1 into the folded state shown in FIG.
[0034]
According to the vehicle seat 1 of the present embodiment having such a configuration, the net member 4 is suspended between the front end frame portion 6a of the seat frame 3 and the upper end frame portion 31a of the back frame 2, and the seating surface is formed. Due to the configuration, the folded state can be made thinner by the absence of the cushion member.
[0035]
Further, according to the vehicle seat 1 of this embodiment, since the length changing means for changing the length of the net member in the longitudinal direction is provided, the net member can be moved in two use positions, the normal use position and the full reclining position. It can be maintained in a properly stretched state without relaxation. Thereby, in the structure in which one net member is laid across the back frame and the seat frame, the back frame can be changed to two positions of the normal use position and the full reclining position without impairing a suitable seating feeling. .
[0036]
【The invention's effect】
According to the first aspect of the present invention, the seat frame, the back frame, and the net which is suspended between the front end frame portion of the seat frame and the upper end frame portion of the back frame to form a seating surface. A tension member for preventing the net member from being loosened by pulling the net member rearward at the seating surface of the seating surface and the dividing line portion on the back surface, so that the back frame extends over at least two use positions. The length of the net member can be changed by changing the length of the net member by the length changing means. Thus, the net member can be maintained in a stretched state at any one of the two use positions without relaxing the net member at any one of the use positions. Accordingly, even in a structure in which one net member is laid across the back frame and the seat frame, the back frame can be changed to at least two use positions without impairing a suitable seating feeling.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a vehicle seat according to this embodiment.
FIG. 2 is a perspective view showing a normal use position of the vehicle seat.
FIG. 3 is a perspective view showing a full flat position of the vehicle seat.
FIG. 4 is a perspective view showing a folded position of the vehicle seat.
FIG. 5 is a schematic diagram for explaining the operation of the length changing means of the net member.
FIG. 6 is a schematic diagram for explaining the operation of the locking means.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Back frame 3 Seat frame 4 Net member 4a Seat surface 4b Back surface 4c Dividing line portion 6a Front end frame portions 47, 47, 47 of the seat frame Coil spring (tensile means)
31a Upper end frame part 50 of back frame Fastener (variable length means)

Claims (1)

A frame for the seat,
A frame for the back,
A net member suspended between a front end frame portion of the seat frame and an upper end frame portion of the back frame to form a seating surface,
Tension means for preventing the net member from being relaxed by pulling the net member rearward at the seating surface of the seating surface and the dividing line portion on the back surface,
With
Supporting the back frame rotatably over at least two use positions,
A vehicle seat provided with a length changing means for changing a longitudinal length of the net member.

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