JPH09109751A - Reclining seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a reclining seat for a vehicle able to bring down the seat back to the front in almost horizontal position and to return it to the reclining angle just before when being erected again. SOLUTION: A seat back 20 is supported adjustably with a tilt angle through a reclining mechanism in a frame rear part of a seat cushion 10. A front tumble axial line O2 is provided in a position placed on the upward from a reclining axial line O1 of an upper arm 17 of the reclining mechanism, the seat back is turned relating to the upper arm with the front tumble axial line O2 serving as the center so as to be brought down to the front, a frame 22 of the seat back, respectively in an erection condition and front tumble condition, is unlockably locked to the upper arm 17 by an erection lock mechanism A and a front tumble lock mechanism B. One side edge of a table is almost 180 deg. openably/closably mounted through a hinge in a back board covering a rear side of the seat back.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat for a vehicle such as an automobile, and more particularly to a reclining seat for a vehicle in which a seat back can be largely moved forward.

[0002]

Some reclining seats for vehicles are designed such that the seat back can be greatly tilted forward in order to expand the space for loading luggage. In addition, some reclining seats of this type include a memory mechanism that restores the reclining angle immediately before when the seat back in the forward tilted state is erected. However, since the conventional one rotates using the reclining shaft when it is tilted forward, it cannot rotate greatly until the back of the seat back is nearly horizontal, and therefore the back of the seat back that is tilted forward cannot be rotated. I couldn't load my luggage in a stable condition. Further, since the seat back is not normally locked in the forward tilted state, there is also a problem in that the seat back tilted forward is rocked due to vibration of the vehicle or the like.

On the other hand, the seat with a forward tilting lock device disclosed in Japanese Utility Model Laid-Open No. 58-178027 does not have a problem that the seat back that has been tilted forward swings, but the reclining shaft is used as in the above-mentioned prior art. The seat back cannot be moved to a position close to horizontal, and the loadability of the luggage is not always sufficient.
Also, since this one also uses the reclining mechanism as the seat back tilting lock mechanism, the reclining angle must be adjusted again by the reclining mechanism when the seat back in the forward tilted state is erected without returning to the previous reclining angle. There is an annoyance that it must be done. An object of the present invention is to solve each of these problems.

[0004]

A reclining seat for a vehicle according to the present invention relates to a reclining seat for a vehicle in which a seat back is supported on a rear portion of a frame of a seat cushion via a reclining mechanism, and a reclining axis line of an upper arm of the reclining mechanism. A forward tilt axis is provided at a higher position, and the seat back is rotated about the forward tilt axis with respect to the upper arm to tilt forward, and the frame of the seat back is erected with respect to the upper arm. A standing lock mechanism that locks releasably is provided.

The vehicle reclining seat according to the present invention preferably further comprises a forward tilting lock mechanism for releasably locking the frame of the seat back to the upper arm when the frame is tilted forward.

Further, the respective lock mechanisms are provided on both lower sides of the frame of the seat back, and by operating one knob, the respective lock mechanisms on both sides are interlocked with each other to operate, thereby simultaneously releasing the locking of the seat back frame with respect to the upper arm. It is preferable to do so.

Further, in the case of the one having the forward locking mechanism, it is preferable that the backboard covering the rear side is fixed to the seat back, and one side edge of the table is attached to the backboard so as to be openable and closable by about 180 degrees via the hinge. .

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the embodiments shown in FIGS. As shown in FIGS. 1 and 2, the vehicle reclining seat according to the present embodiment includes a seat cushion 10 and a seat back 20, and the seat back 20 has a reclining mechanism 15 (see FIG. 3) at a rear portion of the seat cushion 10. ) Via the rotary axis of the reclining axis O1 and the tilting axis O
It is attached so as to be rotatable about 2. A main body 11 of the seat cushion 10 is a seat cushion pad provided on a seat cushion frame (not shown), which is covered with an outer skin, and is attached to a floor of an automobile so as to be positionally adjustable in the front-rear direction, and a lower portion and a rear portion thereof are made of polypropylene or the like. It is covered with a resin shield 12.

The reclining mechanism 15 is mainly shown in FIG.
As shown in FIG. 3, each pair of left and right lower arms 16 is rotatably connected to each other about the reclining axis O1.
And an upper arm 17. Each lower arm 16
Are fixed to both sides of the rear portion of the frame of the seat cushion 10, and each upper arm 17 is seatback 20 centered on a forward tilting axis O2 above the reclining axis O1.
Both lower parts of the frame 22 are rotatably supported.
In the illustrated embodiment, the angle between the lower arm 16 and the upper arm 17 is continuously changed by a planetary gear mechanism using an internal gear and a reclining motor (both are not shown) so that the inclination angle of the seat back 20 is changed. Adjusted.
However, the reclining mechanism 15 is not limited to such a type, and any type such as a manually stepped type using a pole and a ratchet can be used.
FIG. 3 shows only the right half of the reclining mechanism 15, the seat back frame 22 and the members related thereto, and the left half thereof is omitted.

Although not shown, the seat back frame 22 has a plurality of S springs stretched between both sides thereof, and the seat back pad abutting on the front side thereof is covered with a seat back cover to cover the seat back frame. The main body 21 of the seat back 20 shown in FIGS. 1 and 2 is formed by mounting the main body 21 on the seat back 22. The rear side of the seatback body 21,
Thin backboard 2 made of synthetic resin on both sides and upper side
5, a lower edge of a table 50, which will be described later, is attached via a hinge 53 so that it can be opened and closed by 180 degrees.

Mainly as shown in FIG. 3, the seat back frame 22 is a pair of left and right members made of an upper frame 22a formed by bending a pipe material in a downward C-shape and plate members welded to the lower portions on both sides thereof and extending downward. The lower frame 22b,
It is configured by a connecting portion 22c that integrally connects the lower portions thereof. The lower front side of each lower frame 22b is on the upper front side of each upper arm 17 of the reclining mechanism 15,
The pivot pin 23 is rotatably connected via a pivot pin 23 that is inserted concentrically with the forward tilting axis O2, and the pivot pin 23 is retained by an E ring 23a.

Next, the upright lock mechanism A and the forward lock mechanism B for locking the seat back frame 22 in the upright state and the forward tilt state, and the mechanism for releasing these locks will be described. Each of these mechanisms is a seat back frame 22.
One set is provided on both sides of the lower part, but since they are symmetrical to each other, only the right one will be described. As shown in FIGS. 3 to 6, the hook plate 30 made of sheet metal is rotatably supported by a pin 32 fixed by caulking to the lower rear side of the inner surface of the lower frame 22b with a spacer 32a interposed between the pin 32 and the lower frame 22b. Similarly, the sheet metal link 31 is rotatably supported via a pin 33 inserted in the lower center of the lower frame 22b and is prevented from coming off by the E ring 33a, and one end portion of both members overlap each other. . The connecting pin 34 inserted into one end of the link 31 is inserted into an elongated hole 31a formed in one end of the hook plate 30 and is prevented from coming off by the E ring 34a, so that both members 30 and 31 interlock with each other. And are connected so as to rotate. A tension spring 38 is stretched between the link portion 31 and the hook portion 22d formed by cutting and raising at both ends of the connecting portion 22c.
3 is urged in the counterclockwise direction, and the hook plate 30 is urged in the clockwise direction about the pin 32.

A hook-shaped engaging portion 30a is formed at the other end of the hook plate 30, and a stopper pin 36 is caulked and fixed to the outer surface of the other end of the link 31. A cap 3 made of synthetic resin having excellent strength and abrasion resistance of polyacetal resin or the like is provided at the tip of a mounting pin 35a that is inserted and welded inwardly on the rear side of the upper portion of the upper arm 17.
5 is fitted and fixed by machine screws 35b. Further, a notch 37 is formed on the upper front side of the upper arm 17, and the outer edge of the upper arm 17 near the upper side of the notch 37 gradually increases in radius from the forward tilting axis O2 as it goes from above the forward tilting axis O2 toward the notch 37. The guide surface 17a is formed. The hook plate 30 and the cap 35 are engaged with each other by the spring 38 when the seatback frame 22 is in the upright state, and the hookback 30 and the cap 35 are engaged with each other.
The standing lock mechanism A that locks the seat back frame in the standing state is formed, and the connecting pin 34 and the notch 37 form the seat back frame 22.
When the vehicle is in the forward tilted state, the spring 38 engages with each other to configure the forward lock mechanism B that locks the seat back 20 in the forward tilted state.

A lever 40 made of sheet metal is rotatably supported by a pin 41 which is caulked and fixed to the front side of an ear portion 22e in which the rear side of each lower frame 22b is bent inward.
The lever 40 is bent into a shape in which U-shapes are combined in the opposite direction, and the front end portion 40c facing outward is the lower frame 22b.
The backboard 2 to be described later passes through the opening 22f formed in the
5 goes out from the slit of the bezel 26 attached to the window hole 25b of No. 5, and the knob 42 is inserted and fixed. Lever 40
Eccentric bent portion 40b and hook portion 3 of hook plate 30
0c is connected by hooking the U-shaped bent portions at both ends of the first connecting wire 43 into the small holes provided in each, so that the knob 42 is urged downward by the spring 38, and normally the lower part of the bezel 26 Located on the side. Small holes are also provided at the tips of the pair of arm portions 40a extending vertically from the center of rotation of the lever 40, and the small holes of the left and right levers 40 are paired with a pair of second connecting wires 44 intersecting at the intermediate portion. U on both ends
It is connected by hooking the bent portion. Left and right knob 4
When either one of the two is pulled upward, the levers 40 are rotated about the pins 41 in opposite directions so that the upper side approaches and the lower side moves away via the second connecting wires 44.
Each hook plate 3 connected via a connecting wire 43
0 and the link 31 are rotated counterclockwise and clockwise against the spring 38. As a result, the engagement of the engagement portion 30a with the cap 35 in each engagement state,
The engagement of the stopper pin 36 with the notch 37 is released, and the seatback 20 can be freely tilted with respect to the upper arm 17.

The backboard 25 covering the rear side, both sides and the upper side of the seatback body 21 is a thin molded product made of synthetic resin such as polypropylene and is fixed to the seatback frame 22. As shown mainly in FIG. 7, a large recess 25a for accommodating the table 50 is formed in the center of the back surface (back side in the drawing) of the backboard 25, and synthetic resin bezels 26 are provided in window holes 25b provided at the lower portions on both sides. Is inserted and hooked by an elastic claw (not shown) that is integrally formed, so that it is retained and retained.

As shown in FIG. 7, the table 50 comprises a frame-shaped main body 51 having a large opening formed in the center and a cover plate 52 adhered and fixed to one side surface of the main body 51. Shallow and elongated dent formed on the (not shown)
The magnet plate 55 provided inside is covered with a cover plate 52. Both the main body 51 and the cover plate 52 are made of synthetic resin. Hinge 53 for supporting the table 50
Is composed of a pair of left and right brackets 53a, a pair of left and right protrusions 53b integrally formed on the lower edge of the main body 51, and a shaft 53c. Each pair of brackets 53
a is a seat portion 25 formed on the lower portion of the inner surface of the backboard 25.
The heads are attached so as to face each other d, and the respective heads are projected from the opening 25c to the back surface of the backboard 25, and both ends of the shaft 53c passing through the respective protrusions 53b are supported by the heads. As a result, the table 50 is stored in the recess 25a as shown by the solid line 50 in FIG. 2 and is rotated 180 degrees about the shaft 53c of the hinge 53 as shown by an arrow C to form a two-dot chain line 50A. It is opened and closed between the open states as shown. A magnet plate 56 is provided on the inner surface of the backboard 25 at a position corresponding to the magnet plate 55.
When the table 50 is closed with the adhesive fixed, the table 5 is attracted by the attraction force of both magnet plates 55, 56.
0 is kept closed.

In the upright state shown in FIG. 4, the rear lower edge of the lower frame 22b of the seatback frame 22 is the cap 3
5, the hook plate 30 biased in the counterclockwise direction by the spring 38 is rotated in the clockwise direction, and the locking portion 30a is engaged with the cap 35 so that the standing lock mechanism is engaged. A is locked. When the reclining mechanism 15 is operated in this state, the seat back frame 22 is rotated together with the lower arm 16 about the reclining axis O1 to adjust the inclination angle of the seat back 20. In this state, if either the left or right knob 42 is manually pulled up, the left and right levers 40 rotate in opposite directions so that the upper side approaches, and as shown in FIG. 5, via the first connecting wire 43. Rotate the hook plate 30 counterclockwise against the spring 38 to rotate the cap 3
The engagement of the locking portion 30a with respect to 5 is released, and the locking of the standing lock mechanism A is released. Accordingly, the seat back 20 can be tilted forward about the tilt axis O2 while the angle of the upper arm 17 is maintained.

When the knob 42 is released after the start of the forward tilting, the link 31 is rotated by the spring 38 and the stopper pin 36 abuts on the guide surface 17a of the upper arm 17 to guide the seatback 20 if the forward tilting is continued. The surface 17a causes the link 31 to rotate clockwise against the spring 38.
When the stopper pin 36 reaches the position of the notch 37 in the forward tilted state, the stopper pin 36 enters the notch 37 by the urging force of the spring 38, and the forward lock mechanism B is locked. The forward tilt angle is set so that the backboard 25 on the back surface of the seat back 20 becomes substantially horizontal (see FIG. 2) when the seat back 20 is normally used. Therefore, in this state, the luggage can be stably placed on the backboard 25, and if the table 50 is rotated 180 degrees about the shaft 53c and opened, it becomes almost horizontal as shown by the chain double-dashed line 50A. Become. In this state, the recess 25a of the backboard 25 on the front side of the table 50 is also
Can be used as a table.

When the knob 42 on either side is pulled up with respect to the backboard 25 in this forward tilted state, the left and right levers 4 are
0 rotates as described above, the link 31 rotates clockwise against the spring 38, the stopper pin 36 is disengaged from the notch 37, and the locking of the forward locking mechanism B is released. It As a result, the seat back 20 is moved forward to the axis O.
2 can be raised around the center, and if the knob 42 is released in the middle, the link 31 and the hook plate 3
0 indicates that the stopper pin 36 is the guide surface 17 of the upper arm 17.
It is returned by spring 38 until it abuts a. If the seat back 20 further rotates in the upright direction, the hook plate 30
The inclined surface 30b of the locking portion 30a at the tip abuts the cap 35 to rotate the hook plate 30 counterclockwise against the spring 38, and the rear lower edge of the lower frame 22b abuts the cap 35 and stops. Hook plate 3 at the same time
0 rotates in the clockwise direction by the spring 38 and the locking portion 30
a is engaged with the cap 35, the standing lock mechanism A is locked, and the standing state shown in FIG. 4 is restored. Since the upper arm 17 does not rotate around the reclining axis O1 during the forward tilting and standing operations of the seatback 20 centering on the forward tilting axis O2, the seatback 20 returns to the tilt angle immediately before tilting forward.

[0020]

As described above, according to the present invention, only the seat back rotates with respect to the upper arm between the forward tilted state and the upright position while the angle of the upper arm of the reclining mechanism is maintained. If you raise the seat back in the forward tilted state, it immediately returns to the seat back angle just before it was tilted forward. Therefore, it is not necessary to adjust the seat back angle again, and the convenience of use is improved.
Also, since the seat back is tilted forward about the tilting axis above the reclining axis, the seat back can be tilted up to near horizontal, which allows the luggage to be placed in a stable state on the back of the tilted seat back. It becomes possible and the convenience of using the vehicle is improved.

According to the present invention further provided with the forward tilting lock mechanism, the seat back in the forward tilted state is prevented from swinging due to vibrations and the like, so that it is easy to put the luggage on the back surface of the forward tilted seat back, and it is easy to use the vehicle. The convenience of is further improved.

Further, according to the present invention, the lock mechanisms are provided on both sides of the seat back so that the locking of the upper arm with respect to the seat back frame is simultaneously released by interlocking with each other by one knob. The locking is more reliable, and the unlocking operation is simple.

Further, according to the present invention in which the table is provided on the backboard fixed to the seat back so that it can be opened and closed approximately 180 degrees according to the present invention, if the table is opened while the seat back is tilted forward, one Since the part can be used as an extension of the table, a wide table surface can be obtained.

[Brief description of the drawings]

FIG. 1 is an overall side view of an embodiment of a folding seat for a vehicle according to the present invention in a seat back standing state.

FIG. 2 is an overall side view of the embodiment shown in FIG. 1 in a state in which the seat back is tilted forward.

FIG. 3 is a perspective view showing only the right half of the reclining mechanism, the seatback frame and members related thereto in the embodiment shown in FIG.

FIG. 4 is an enlarged side view of a main part of the embodiment shown in FIG. 1 in a seatback upright state.

FIG. 5 is an enlarged side view of a main part of the embodiment shown in FIG. 1 in a state in which a standing lock mechanism is released.

FIG. 6 is an enlarged side view of a main portion of the embodiment shown in FIG. 1 in a state where the seat back is tilted forward.

FIG. 7 is an exploded perspective view of the backboard and table of the embodiment shown in FIG.

[Explanation of symbols]

10 ... Seat cushion, 16 ... Lower arm, 17 ... Upper arm, 20 ... Seat back, 22 ... Frame, 2
5 ... Backboard, 42 ... Knob, 50 ... Table, 53
... hinge, A ... standing lock mechanism, B ... forward lock mechanism, O1 ... reclining axis, O2 ... forward tilt axis.

Claims (4)

[Claims] 1. A reclining seat for a vehicle in which a lower side of a seat back is supported by a pair of upper arms rotatably connected to a pair of lower arms fixed to both rear sides of a frame of a seat cushion around a reclining axis. In a state in which the lower both sides of the frame of the seat back are supported by the upper arm so as to be rotatable around a forward tilting axis positioned above and parallel to the reclining axis, and the frame of the seat back is erected with respect to the upper arm. In the reclining seat for vehicles, a standing lock mechanism for releasably locking the frame to the upper arm is provided. 2. The reclining seat for a vehicle according to claim 1, further comprising a forward tilting lock mechanism for releasably locking the frame of the seat back to the upper arm in a state of being tilted forward with respect to the upper arm. 3. The respective lock mechanisms are provided on both lower sides of the frame of the seat back, and by operating one knob, the lock mechanisms on both sides are interlocked with each other to operate so that the frame of the seat back with respect to the upper arm. The vehicle reclining seat according to claim 2, wherein the locking is released at the same time. 4. A backboard covering a rear side of the seatback is fixed to the seatback, and one side edge of the table is attached to the backboard via a hinge so as to be openable and closable by about 180 degrees. The vehicle reclining seat described in.