JP2000177449A - Seat device for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat device for an automobile not requiring a complicated forward folding operation and allowing improvement of operability. SOLUTION: A hinge plate 10 of this seat device is formed with an engaging long hole 20 extending radially upward with a connection pipe 11 as the center; an engagement release hole 21 extending from the engaging long hole 20; and a hinge hole 10c for journaling a second hinge member 15 of the hinge plate 10, formed as a long hole extending to a nearly same direction as the engaging long hole 20. An engaging pin 25 for engaging with the engaging long hole 20 to prevent a turn of a seat back 4 around the second hinge member 15 is fixed to the seat back 4. A cam plate 30 formed with a cam face 30c is turnably journalled to a seat cushion 3. The cam face 30c is formed such that the cam plate 30c presses the engaging pin 25 to the engaging direction and moves the engaging pin 25 to a direction wherein the engagement of the engaging pin 25 with the engaging long hole 20 is released when the seat back 4 is turned forward around the connection pipe 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile seat device having a seat back pivotally supported by a seat cushion via a hinge plate.

[0002]

2. Description of the Related Art As a general seat apparatus for an automobile, conventionally, as shown in FIG. 6, for example, a seat cushion 50 and a seat back 51 are connected to a hinge plate 52 via first and second hinge shafts 54 and 55. There is a structure in which a lock mechanism 53 that is connected to the seat back 51 and that prevents rotation of the seat back 51 around the second hinge shaft 55 is provided on the seat back 51.

The lock mechanism 53 rotatably supports the plate 56 between a lock position and a release position and urges the plate 56 in a lock direction by an urging spring (not shown). The seat back 51 can be tilted forward by pulling up the lock knob 57 to release the lock.

[0004]

However, in the above-mentioned conventional seat apparatus, it is necessary to perform a complicated operation of tilting the seat back forward in a state where the lock knob is pulled up against the urging force of the spring, resulting in low operability. There is a problem.

The present invention has been made in view of the above-mentioned conventional circumstances, and has as its object to provide a vehicle seat apparatus which can improve operability without requiring a complicated forward moving operation.

[0006]

According to a first aspect of the present invention, a lower end of a hinge plate is rotatably supported via a first hinge member by a seat cushion disposed above a floor. In an automobile seat device in which a seat back is rotatably supported at the upper end of the seat back via a second hinge member, when the seat back is located in an upright position between the hinge plate and the seat back, A cam type seat that engages to prevent rotation of the seat back about the second hinge member, and releases the engagement as the seat back is rotated forward about the first hinge member. It is characterized by having a forward mechanism.

According to a second aspect of the present invention, in the first aspect, the cam-type seat tilting mechanism has an engagement elongated hole extending in a direction away from the first hinge member in the hinge plate and the engagement length. A disengagement hole is formed following the hole,
The hinge hole of the hinge plate that supports the second hinge member is a long hole extending in substantially the same direction as the long slot, and the second hinge of the seat back is engaged with the long slot. An engaging pin for preventing rotation about the member is fixed to the seat back, a cam plate is provided on the seat cushion, and the seat back is rotated forward about the first hinge member by the cam plate. A cam surface having a shape for moving the engagement pin in a direction in which the engagement with the engagement long hole is released when the engagement pin is released.

According to a third aspect of the present invention, in the second aspect, the cam surface has a cam rotation trajectory forward of the cam plate along with the forward rotation of the seat back. It is characterized in that it is formed so as to intersect the pin rotation trajectory forward about the hinge member on the way, and to move to the side where the engagement of the engagement pin with the engagement long hole is released. I have.

Here, the long engaging hole and the disengaging hole in the present invention need not necessarily be through holes. If sufficient rigidity can be secured so that the engaging pin does not come off, an engaging groove is used. There may be. Further, it is desirable to set the dimensions so that the engagement hole, the engagement release hole, and the engagement pin can slide without play, whereby a smooth and stable operation can be obtained. Furthermore, it is desirable that the engagement release hole is formed in a straight line, whereby the same operational feeling can be obtained from the initial stage to the final stage of the forward operation.

[0010]

In the seat device according to the present invention, the engaging pin of the seat back engages with the engaging long hole of the hinge plate when the seat is normally used, so that the seat back is in the second hinge position. Rotation about the member is prevented. Thus, the occupant can sit on the seat without any trouble. The hinge plate is rotatable about the first hinge member with respect to the seat cushion,
Therefore, when the vehicle has the reclining mechanism, the reclining operation of the seat back is possible.

In order to tilt the seat back forward, the seat back is rotated forward about the first hinge member. Then, the engagement pin pivots forward about the first hinge member and pivots the cam plate forward against the urging force. When the seat back is further rotated forward in this state, the engaging pin comes into contact with the cam surface of the cam plate and moves along the long engaging hole. As a result, the seat back slightly rises, and the engagement pin is disengaged from the elongated engagement hole and moves to the engagement release hole. As a result, the seat back can rotate about the second hinge member. In this state, the seat back is moved forward to the upper surface of the seat cushion.

As described above, according to the present invention, the rotation of the seat back around the second hinge member is prevented by engaging the engagement pin fixed to the seat back with the engagement elongated hole of the hinge plate. As a result, the seat back can be reliably held at the upright position during normal seating use.

[0013] Further, a cam plate for pivotally moving the seat back in a direction in which the engagement pin is disengaged when the seat back is rotated forward about the first hinge member is pivotally supported on the seat cushion. Therefore, when the seat back is moved forward, simply by tilting the seat back forward, the rotation inhibition about the second hinge member is automatically released, and the conventional lock member is pulled up. The complicated operation of moving forward in the state can be eliminated,
This has the effect of improving operability.

According to a third aspect of the present invention, the cam surface has a cam rotation locus which intersects the pin rotation locus of the engaging pin halfway, and further, the engagement of the engaging pin is released. As the seat back is rotated forward, the engagement pin moves from the long engagement hole to the inside of the disengagement hole, and the seat back can be moved forward. ,
The seat back forward / rearward mechanism can be configured with a simple structure without increasing the number of parts so much, and there is an effect of suppressing an increase in cost.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 5 are views for explaining a seat device of an automobile according to an embodiment of the present invention. FIG. 1 is a side view showing an upright fixed state of a seat back of the seat device, and FIG. FIG. 3 is a cross-sectional rear view around the hinge plate of the seat device (a cross-sectional view taken along the line III-III in FIG. 1), and FIG. 4 is a schematic diagram illustrating the rotation locus of the cam plate and the engaging pin. FIG. 5 is a schematic perspective view of the seat back viewed from the rear.

In FIG. 1, reference numeral 1 denotes a seat device, which is arranged on a vehicle body floor (not shown) and supports a passenger's buttocks, and a left and right supporting members from the waist to the back.
The seat back 4 is divided into two seat backs 4 and 4 '. The seat cushions 3, 3 and 4 'have a general structure in which cushion pads are provided on a seat frame and these are covered with a skin.

The upper surface 3a of the seat cushion 3 has an inclination angle of about 10 degrees and is higher toward the front side, and the seat back 4 is inclined slightly rearward in a normal seating use position. This improves the sitting comfort and stabilizes the sitting posture.

As shown in FIG. 5, a hook-shaped striker 6 is mounted in a concave portion 5 formed at the upper right end of the back surface 4a of the seat back 4. The striker 6 is attached to the seat back on the right side. 4 'is detachably engaged with an engaging member 7 attached to the side wall on the vehicle inner side of 4'. Seat back 4
'Is fixed to the vehicle body so as to be able to be disengaged, thereby preventing the seat back 4 from rotating rearward and forward about a first hinge member 11 described later. In addition,
The seatbacks 4 and 4 'may be reclined around the first hinge member 11 by a reclining mechanism (not shown). In addition, the striker 6
May be attached to the outside of the seat back 4, in which case the engaging member 7 is attached to the vehicle body panel.

Left and right side walls 4b, 4 of the seat back 4
A hinge plate 10 extending downward along the side wall 4b is disposed at the position b. The hinge plate 10 is formed in a substantially inverted letter shape when viewed from the left side, and the rear convex portion 10g projects rearward from the rear surfaces of the seat cushion 3 and the seat back 4. A dish-shaped resin cover 9 is mounted on the outer surface of the left and right hinge plates 10, and the hinge plate 10 is covered with the resin cover 9.

The lower end portions 10a of the left and right hinge plates 10 are connected to each other by a connecting pipe 11 as a first hinge member so as not to be twisted or displaced in the front-rear direction. Both ends are rotatably supported by a seat frame 12 of the seat cushion 3 via a bearing member 13.

Further, a torsion spring 14 that urges the hinge plate 10 to rotate forward (in the direction indicated by the arrow a in FIGS. 1 and 4) is wound around the connecting pipe 11.
One end of the spring 14 is locked in the support hole 10 e of the hinge plate 10, and the other end is locked in the seat frame 12.

The left and right side walls 4b of the seat back 4 are formed on the upper end 10b of the left and right hinge plates 10 in the second direction.
It is pivotally supported via a hinge member 15. The second hinge member 15 inserts a stepped bolt 16 into a hinge hole 10 c formed in the upper end 10 b of the hinge plate 10 and fastens the bolt 16 to a seat back frame 17 of the seat back 4 with a nut 18. It has a fixed structure. In this way, the seat back 4 is rotatable back and forth around the connecting pipe 11 and is rotatable back and forth around the second hinge member 15.

The hinge hole 10c is a long hole extending upward in the radial direction around the connecting pipe 11 of the seat back 4. As a result, the seat back 4 has the hinge holes 10.
It is possible to move in the radial direction with respect to the hinge plate 10 by the length of the long hole c.

The connecting pipe 11 of the hinge plate 10
In the intermediate portion between the first hinge member 15 and the second hinge member 15, an engagement elongated hole 20 is formed extending in the same direction as the hinge hole 10c, that is, extending upward in the radial direction around the connection pipe 11 as the first hinge member. ing. At the upper end of the long engagement hole 20, there is formed an engagement release hole 21 extending substantially rearward at a right angle to the rear, and the engagement release hole 21 is formed by the rear projection 10g.
Extending to the trailing edge.

The long engaging hole 20 does not necessarily have to extend in the radial direction around the connecting pipe 11.
In short, it may be formed so that an engagement pin 25 described later extends in a movable direction together with the seat back 4. The engagement release hole 21 is provided with a stepped bolt 16 as a second hinge member.
Can be formed in an arc shape with the center as the center, but in the present embodiment, it is formed in a linear shape. Thus, in the forward movement of the seat back, a certain operational feeling can be obtained from the early forward to the final period.

An engagement pin 25 is implanted in the seat back frame 17 on the side wall 4b of the seat back 4.
The engaging pin 25 is engaged with the lower end of the long engaging hole 2 of the hinge plate 10 when the seat back 4 is in the upright state. As a result, the seat back 4 around the second hinge member 15
Is prevented from rotating in the front-rear direction. The dimensions of the engaging pin 25, the long engaging hole 20, and the disengaging hole 21 are set so that there is no backlash. The problem that the seat back is twisted when the back is raised can be avoided.

A reinforcing plate 26 is fixed to the outer surface of the hinge plate 10 so as to straddle the disengagement hole 21, and a support piece 26 is attached to a front edge of the reinforcing plate 26.
a is cut and raised outward. This support piece 2
A coil spring 27 is provided between the stepped bolt 6a and the stepped bolt 16 of the second hinge member 15, and the spring 27 urges the seat back 4 downward.

By providing the coil spring 27, the seat back 4
Can be brought into close contact with each other to improve the appearance and avoid problems such as falling of an object from between the seat cushion 3 and the seat back 4.

A substantially rectangular cam plate 30 is disposed on the back side of the left and right hinge plates 10, respectively. Lower ends 30a of the cam plates 30 are connected to each other by a support pipe 31 so as not to be twisted or displaced in the front-rear direction. Both left and right ends of the support pipe 31 are connected to the seat frame 1 of the seat cushion 3.
2 is rotatably supported via a bearing member 32.

A torsion spring 33 for rotating the cam plate 30 in the backward direction (the direction indicated by the arrow “b” in FIGS. 1 and 4) is wound around the support pipe 31. One end is locked to the front end face of the cam plate 30, and the other end is locked to the seat frame 12.

The rear end face 30 b of the cam plate 30 is in contact with the engaging pin 25, and urges the engaging pin 25 in the direction of engagement with the long slot 20. Further, a cam surface 30c is formed at the longitudinal center of the rear end surface 30b of the cam plate 30, and the cam surface 30c is formed by cutting out the upper half of the rear end of the cam plate 30. The support pipe 31 has an arc centered on the axis.

The forward cam rotation trajectory X about the axis of the support pipe 31 on the cam surface 30c is the forward pin rotation about the axis of the connecting pipe 11 of the engaging pin 25. The shape of the cam surface 30c and the support pipe are set so as to intersect with the locus Y on the way, and to be located on the side where the engagement of the engaging pin 25 with the engaging elongated hole 20 is released from the pin rotation locus Y. 31, the position of the connecting pipe 11 is set. Thus, when the seat back 4 is rotated forward, the engagement pins 2
5 comes into contact with the cam surface 30c at the intersection of the two rotation trajectories X and Y, and moves upward so as to ride on the cam surface 30c.

The engagement pin 2 on the inner surface of the hinge plate 10
A stopper pin 35 is implanted in a portion rearward from 5, and the stopper pin 35 contacts the cam plate 30 when the seat back 4 is tilted forward on the upper surface 3a of the seat cushion 3 and rotates forward. Is set to the mounting position. As a result, the cam plate 30 is
5, the engagement pin 25 can be smoothly moved in the engagement release hole 21.

The length of the cam plate 30 is set so that the engaging pin 25 does not come off from the cam plate 30 even when the seat back 4 is pulled backward and pulled backward. .

Next, the operation and effect of this embodiment will be described. At the time of normal use of the seat, the engagement pin 25 of the seat back 4 is engaged with the bottom of the engagement long hole 20 of the hinge plate 10, whereby the rotation of the seat back 4 around the second hinge member 15 is performed. Has been blocked. Further, the striker 6 of the seat back 4 is engaged with the engaging member 7 to prevent the seat back 4 from turning backward, whereby the seat back 4 is held at a predetermined standing position without shaking.

To lower the seat back 4 forward, the engagement of the striker 6 is released, and the seat back 4 is rotated forward. Then, the engagement pin 25 rotates forward through the hinge plate 10 around the connection pipe 11, and
Along with this, the cam plate 30 is pushed by the engaging pin 25 and rotates forward. When the seat back 4 is further rotated forward, the engagement pin 25 is moved to the cam surface 3 of the cam plate 30.
0c and rotates along the cam rotation trajectory X of the cam surface 30c, whereby the engagement pin 25 moves in the disengagement direction along the engagement long hole 20. As a result, the seat back 4 Is pushed up slightly. Then, the engagement pin 25 is disengaged from the elongated engagement hole 20 and moves into the engagement release hole 21, and the seat back 4 is also rotatable around the second hinge member 15. It falls down on the upper surface 3a of the seat cushion 3. Thereby, the seat back 4 can be folded compactly.

In order to return the seat back 4 to the standing position, the seat back 4 is lifted so as to rotate rightward. In this case, since the hinge plate 10 is urged forward by the torsion spring 14, the seat back 4 first pivots rearward about the second hinge member 15, whereby the engagement pin 25 is engaged. It moves along the engagement release hole 21 and contacts the cam plate 30. When the seat back 4 is further rotated backward from this state, the cam plate 30 moves to a position away from the engagement pin 25, and the engagement pin 25 is engaged in the engagement elongated hole 20. As a result, the seat back 4 is prevented from rotating about the second hinge member 15, is rotated about the connecting pipe 11, and returns to the upright position.

As described above, according to the present embodiment, the engagement pin 25 fixed to the seat back 4 is connected to the hinge plate 10.
The seat back 4
The rotation about the second hinge member 15 is prevented, so that the seat back 4 can be reliably held at the upright position.

The cam plate 30 pivotally supported by the seat cushion 3 urges the engagement pin 25 in the direction of engagement with the engagement elongated hole 20 and pushes the seat back 4 forward with the connection pipe 11 as the center. When the seat back 4 is tilted forward, it is automatically engaged simply by tilting the seat back 4 forward. The engagement of the mating pin 25 is released, so that the seat back 4 can be easily moved forward, so that the complicated operation of moving the lock member up and down with the conventional lock member raised can be eliminated, and operability can be improved. .

In order to return the seat back 4 that has been tilted forward to the standing position, the engaging pin 25 automatically engages with the engaging slot 20 by simply lifting the seat back 4 and turning it backward. From this point, operability can be improved.

In this embodiment, the cam rotation locus X forward of the cam surface 30c of the cam plate 30 is determined by the engagement pin 2
5 so that the cam surface 30 intersects the forward pin rotation locus Y and is located on the disengagement side with respect to the pin rotation locus Y.
Since the shape of c and the positions of the respective rotation centers 11 and 31 are set, the engagement pin 25 shifts from the pin rotation locus Y to the cam rotation locus X with the forward rotation of the seat back 4. As a result, the seat back 4 can be moved upward in a state where the seat back 4 can be moved forward, so that the forward movement mechanism of the seat back 4 can be configured with a simple structure without increasing the number of parts so much, thereby suppressing an increase in cost.

In this embodiment, the seat back 4
The seat back 4 can be fixed in an upright state only by fixing the engagement pin 25 to the hinge plate 10 and forming the engagement long hole 20 in which the engagement pin 25 is engaged in the hinge plate 10. The number of parts can be reduced, the structure can be simplified, and the cost can be reduced.

When the seat back 4 is raised and fixed, the engagement pin 25 is engaged with the bottom surface of the engagement elongated hole 20. When the seat back 4 is tilted forward, the engagement pin 25 is engaged with the rear end surface of the engagement release hole 21. The seat back 4 can be securely held without wobbling.

In the above embodiment, the case where the seat back is divided into two parts, left and right, has been described. However, the present invention can of course be applied to a left and right integrated seat back.

[Brief description of the drawings]

FIG. 1 is a side view showing an upright fixed state of a seatback for explaining a vehicle seat device according to an embodiment of the present invention.

FIG. 2 is a side view showing the seat device in a state where a seat back is tilted forward.

FIG. 3 is a rear cross-sectional view (a cross-sectional view taken along the line III-III in FIG. 1) of a portion around the hinge plate of the seat device.

FIG. 4 is a schematic diagram showing a rotation locus of a cam plate and an engagement pin of the seat device.

FIG. 5 is a schematic perspective view of a seat back of the seat device.

FIG. 6 is a side view of a conventional general sheet device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat device 3 Seat cushion 4 Seat back 10 Hinge plate 10a Lower end 10b Upper end 10c Hinge hole 11 Connecting pipe (1st hinge member) 15 Second hinge member 20 Engagement long hole 21 Engagement release hole 25 Engagement pin 30 Cam plate 30c Cam surface 33 Torsion spring X Cam rotation path Y Pin rotation path

Claims (3)

[Claims] 1. A lower end portion of a hinge plate is rotatably supported via a first hinge member by a seat cushion disposed above a floor, and a seat back is pivotally supported at an upper end portion of the hinge plate by a second hinge member. A second hinge member of the seat back between the hinge plate and the seat back when the seat back is positioned in the upright position. And a cam-type seat tilting mechanism for releasing the engagement as the seat back is rotated forward about the first hinge member while preventing the seat back from rotating. Automotive seat equipment. 2. The cam-type seat forward-leaving mechanism according to claim 1, wherein the hinge plate has an engagement elongated hole formed in the hinge plate in a direction away from the first hinge member, and is engaged with the engagement elongated hole. By forming an engagement release hole, a hinge hole for supporting the second hinge member of the hinge plate is a slot extending in substantially the same direction as the engagement slot, and engaging the engagement slot with the engagement slot. An engaging pin for preventing rotation of the seat back around the second hinge member is fixed to the seat back, a cam plate is provided on the seat cushion, and the cam plate is provided with a seat around the first hinge member. An automobile characterized by forming a cam surface having a shape for moving the engagement pin in a direction in which the engagement with the engagement long hole is released when the back is rotated forward. Sea of Device. 3. The cam surface according to claim 2, wherein, with the forward rotation of the seat back, the forward cam rotation locus of the cam plate is centered on the first hinge member of the engagement pin. The vehicle seat device is formed so as to intersect with the forward pin rotation locus on the way, and to move to a side where the engagement of the engagement pin with the engagement long hole is released. .