JP2003341392A - Seat unit for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat unit for an automobile which can suppress the rise of a cost with the small number of components and which can prevent an operation from being faulted. <P>SOLUTION: In the seat unit for the automobile having a seat sliding locking mechanism 5 for locking a seat cushion, the lower arm 8 of the seat cushion 4 is rotatably coupled to the upper arm 9 of a seat back 6 via one coupling shaft 10 disposed at a higher place than the upper surface 4a of the cushion, the back 6 is rotatably supported among a seating position A, a forward tilting walk-in position C and forward tilting folding position Ds in which the back surface 6a of the back 6 becomes substantially horizontal. When the back 6 is rotated to the forward walk-in position C, the locking of the mechanism 5 is released, and when the back 6 is rotated to the forward folding position D, the mechanism 5 is locked. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat device for an automobile in which a seat back is rotatable between a seating position, a forward tilt walk-in position, and a forward tilt folding position.

[0002]

2. Description of the Related Art In a vehicle seat device, a seat back is seated at a position where an occupant can sit, a frontward walk-in position at which a rear occupant can get in and out, and a frontward folding position at which the back of the seat back is substantially horizontal. There is a case where the back of the seat back in the forward folding position is used as a table or a cargo bed so that the seat back can be rotated to and from the position.

In such a seat device, conventionally, the seat back has generally been formed into a two-stage folded structure. For example, in Japanese Patent Laid-Open No. 2000-253942, a lower arm fixed to a seat cushion and an upper arm fixed to a seat back are connected via an intermediate arm,
At the time of forward walk-in, the upper-side connecting portion between the upper arm and the intermediate arm is fixed, and the lower-side connecting portion between the intermediate arm and the lower arm is unlocked to rotate the seat back around the lower-side connecting portion. . Further, when the seat back is tilted forward and tilted to the folding position, the lower side connecting portion is fixed and the upper side connecting portion is unfixed, whereby the seat back is rotated around the upper side connecting portion. There is.

[0004]

However, in the case of adopting the conventional two-stage folding structure of the seat back described above,
Since it is necessary to provide a fixing means for fixing the arms to each other and a releasing means for releasing the fixation, the number of parts is increased and the structure is complicated, which is disadvantageous in terms of cost and causes malfunction. There is a problem that it is easy.

The present invention has been made in view of the above conventional circumstances, and provides an automobile seat device capable of reducing the number of parts and simplifying the structure, suppressing an increase in cost, and preventing malfunction. The purpose is to do.

[0006]

According to a first aspect of the present invention, there is provided a vehicle seat device including a seat slide lock mechanism for locking a seat cushion slidably arranged in a vehicle front-rear direction at a desired front-rear position. A lower arm fixed to the seat cushion and an upper arm fixed to the seat back are rotatably connected via a connecting shaft arranged at a position higher than the upper surface of the seat cushion, and the seat back is The seat back is rotatably supported between a sitting position where the occupant can sit, a forward walk-in position that enables the rear occupant to get in and out, and a forward folding position where the back surface of the seat back is substantially horizontal, and the seat back. When the seat tilt lock mechanism is turned forward to the walk-in position, the seat slide lock mechanism is unlocked, When is pivoted ahead folding position is-back is characterized by being configured so as to lock the seat slide lock mechanism.

According to a second aspect of the present invention, in the first aspect, when the first operation lever is operated, the fixation of the seat back to the seating position is released, and the seat back is tilted forward to rotate to the walk-in position. And the regulation of the walk-in position is moved forward by operating the second operation lever,
A seat back rotation mechanism that allows rotation to the forward folding position, a lock plate pivotally supported by the lower arm and connected to the seat slide lock mechanism via a seat slide cable, and fixed to the upper arm. When the seat back is tilted forward and rotated to the walk-in position, the lock release pin rotates the lock plate to the lock released position, and the seat back is rotated to the forward folding position. In this case, the lock release pin is disengaged from the lock plate and the seat lock operation mechanism is provided for pivotally returning the lock plate to the lock position.

[0008]

According to the first aspect of the invention, the connecting shaft for rotatably supporting the seat back is arranged at a higher position than the seat cushion, and when the seat back is tilted forward and rotated to the walk-in position, the seat slide lock is performed. Since the seat slide lock mechanism is locked when the mechanism is unlocked and the seat back is tilted forward and rotated to the folding position, the seat back is seated by one connecting shaft, the tilt-forward walk-in position, and the tilt-folding position. It can be rotatably supported between the two parts, and the number of parts can be reduced compared to the case where the conventional two-stage folding structure is adopted,
And the structure can be simplified. As a result, it is possible to reduce costs and prevent malfunctions.

According to the second aspect of the present invention, the seat back can be rotated by operating the first operation lever, the rotation is restricted to the forward tilt walk-in position, and the seat back can be rotated forward by the second operation lever. Since the restriction on the seat back is released and the seat back can be tilted forward and turned to the folding position, the seat back can be turned to a desired angular position with a simple structure.

Further, the seat back can be locked or unlocked with a simple structure with a small number of parts such as a lock plate on the seat back side and a lock release pin on the seat cushion side.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 15 are views for explaining a vehicle seat device according to an embodiment of the present invention.
1 is a side view of the seat device as seen from the outside of the vehicle, FIG. 2 is a rear view of the seat device as seen from the rear of the vehicle, FIG. 3 is a side view showing the operation of the seat device, FIG. 4, FIG. 6, FIG. 10, Figure 1
2 is a side view of the lower component of the seat device and the inner component parts of the upper arm as viewed from the outside of the vehicle, FIG. 5, FIG. 7, FIG.
11 and 13 are the lower part of the seat device seen from the outside of the vehicle,
Side view of the outer components of the upper arm, FIG.
FIG. 14 (e) is a diagram showing a method of operating the seat device, FIG.
FIG. 3 is a side view of the seat device.

In the figure, reference numeral 1 denotes a seat device arranged on a floor panel 2 which constitutes a passenger compartment of an automobile.
The seat device 1 includes a pair of left and right slide rails 3 and 3 fixed on a floor panel 2, and the slide rail 3
Seat cushion 4 movably supported in the vehicle front-rear direction by a passenger's buttocks, and the seat cushion 4
A seat slide lock mechanism 5 for locking the seat slide lock 3 at a desired position on the slide rail 3, and the seat cushion 4
And a seat back 6 for supporting the occupant's back. A headrest 7 is detachably attached to the seat back 6. Although not shown, the seat back 6 and the seat cushion 4 have a structure in which a cushion material is disposed on a seat frame and the cushion material is covered with a skin.

A lower arm 8 made of a steel plate is bolted and fixed to the rear end portions of the left and right side walls of the seat cushion 4, and the vehicle outer side of the lower arm 8 is bolted and fixed to the lower end portions of the left and right side walls of the seat back 6. An upper arm 9 made of a steel plate is connected via a connecting shaft 10 so as to be rotatable in the vehicle front-rear direction. The connecting shaft 10 projects both inside and outside the vehicle and is fixed to the lower arm 8.

The connecting shaft 10 is arranged so as to be located at a position slightly higher than the upper surface 4a of the seat cushion 4 when viewed from the side of the vehicle, whereby the seat back 6 is connected by one connecting shaft 10. Seating position A where passengers can sit
A full flat position B that rotates rearward so as to be substantially flush with the seat cushion 4, a forward tilt-in walk-in position C that enables a rear occupant to get in and out, and a seat that abuts on the upper surface 4a of the seat cushion 4. A seat back rotation mechanism is configured to rotatably support the back surface 6a of the back 6 in a forward folding position D in which the back surface 6a is substantially horizontal.

In the seat slide lock mechanism 5, the seat cushion 4 is provided with a lock member 11 that can be fitted into the slide rail 3, and the lock member 11 is biased in the lock direction and is locked by the lock member 11. It has a structure in which one end of the seat slide cable 12 is connected and the other end is connected to a seat lock operation mechanism described later.

When the seat back 6 is in the seating position A, the lock member 11 is fitted to the slide rail 3 to lock the seat cushion 4 immovably, and the seat back 6 is tilted forward and pivoted to the walk-in position C. The seat lock operation mechanism is configured to pull up the lock member 11 via the seat slide cable 12 and thereby release the fitting with the slide rail 3.

A fixing pin 15 is fixed above the connecting shaft 10 of the upper arm 9 so as to project both inside and outside the vehicle. A return spring 16 is wound around the inside of the fixing pin 15 and the connecting shaft 10 to constantly bias the upper arm 9 forward of the vehicle.

A diamond-shaped outer plate 17 is arranged and fixed on the vehicle outer side of the lower arm 8 with a gap provided between the outer plate 17 and the lower arm 8. A recliner shaft 19 projecting to the outside of the vehicle is pivotally supported at a lower end portion of the outer plate 17, and a lower end portion of a recliner operating lever (first operating lever) 20 extending obliquely upward and rearward is connected to the recliner shaft 19. Has been done.

The recliner shaft 19 is pivoted forward of the vehicle by a coil spring 22 installed between a spring support piece 21 fixed to the recliner shaft 19 and a spring receiving portion 8a formed by bending at the rear end edge of the lower arm 8. It is energized.

The lower portion 9a of the upper arm 9 has an arc shape, and the seat back 6 is provided on the lower outer peripheral portion of the lower portion 9a.
Engaging teeth 9b for restricting the standing angle at the seating position A are formed. Further, a regulation tooth 9c is formed on the front portion of the lower portion 9a for regulating the seat back 6 to the forward folding position D.

Between the lower arm 8 and the outer plate 17, a ratchet 24 having pawl teeth 24a capable of meshing with the engaging teeth 9b is arranged. This ratchet 2
Reference numeral 4 denotes a ratchet shaft 25 which rotates between an engagement position (shown by a solid line in FIG. 3) where the engagement teeth 9b are engaged and a disengagement position (shown by a two-dot chain line in FIG. 3) where the engagement is released. It is movably supported and biased to the disengagement position. On the lower surface of the ratchet 24, an engaging portion 24b with which a cam plate 26, which will be described later, engages, and a recessed portion 24c subsequent thereto are formed.

The cam plate 26 is fixed to the recliner shaft 19. The cam plate 26 is constantly urged to rotate by the coil spring 22 so that the ratchet 24 is engaged with the engaging portion 24b and brought into a meshing position for meshing the ratchet 24 with the upper arm 9. When the recliner operating lever 20 is rotated rearward, the cam plate 26 engages with the recess 24c and the ratchet 24 is engaged.
Is allowed to rotate downward, and thereby the meshing with the upper arm 9 is released. By rotating the recliner operating lever 20 in this manner, the standing angle of the seat back 6 at the sitting position C can be changed,
The seat back 6 can be tilted back to the full flat position B.

The seat lock operation mechanism unlocks the seat slide lock mechanism 5 when the seat back 6 is tilted forward and rotated to the walk-in position C,
The seat slide lock mechanism 5 is configured to be locked when the seat back 6 is tilted forward from the walk-in position C and pivoted to the folding position D, which will be described in more detail below.

On the vehicle outer side of the lower arm 8, a first and a second lock plates 30 and 31 are independently rotatably supported by a lock shaft 32. The first and second lock plates 30 and 31 are urged in the expanding direction by a spiral spring 33 wound around a lock shaft 32.

The second lock plate 31 comes into contact with a stopper portion 8b formed by cutting and raising the lower arm 8 to restrict downward rotation. The inner cable 12a of the seat slide cable 12 of the seat slide lock mechanism 5 is connected to the second lock plate 31, and the outer cable 12b is fixed to the bracket 8c joined to the lower arm 8.

A locking pin 31a is fixed to the rear end of the second lock plate 31, and the locking pin 31a has a locking portion 30a protruding from the rear end of the first lock plate 30. Are in contact. As a result, when the first lock plate 30 rotates upward, the second lock plate 31 follows and rotates, the inner cable 12a is pulled up accordingly, and the seat slide lock mechanism 5 is unlocked. When the first lock plate 30 rotates downward, the second lock plate 31 rotates until it comes into contact with the stopper portion 8b to lock the seat slide lock mechanism 5.

On the vehicle exterior side of the connecting shaft 10, a central portion in the longitudinal direction of a belt plate-shaped lock release plate 35 is pivotally supported. A fitting recess 35a that fits into the fixing pin 15 is formed at one end of the unlocking plate 35.
As a result, the lock release plate 35 rotates together with the upper arm 9. A lock release pin 36 is fixed to the other end of the lock release plate 35.

When the seat back 6 is in the seated position A, the lock release pin 36 is provided with the first lock plate 30.
When the seat back 6 is tilted forward and pivoted to the walk-in position C, the seat back 6 contacts the front end face 30b of the first lock plate 30 and pivots the first lock plate 30 upward. Then, the first lock plate 3
The locking portion 30a of 0 moves the locking pin 31a downward, that is, the second
The lock plate 31 is rotated upward. Along with this, the inner cable 12a of the seat slide cable 12 is pulled up, and the fitting of the lock member 11 with the slide rail 3 is released. When the seat back 6 further rotates forward with the lock release pin 36 rotating the first lock plate 30 upward, the lock release pin 3 is released.
6 moves past the first lock plate 30 and moves rearward, and accordingly, the first and second lock plates 30, 31
Rotates downward, the inner cable 12a contracts downward, and the lock portion 11 is fitted to the slide rail 3.

An inner plate 37 is provided inside the lower arm 8 with a gap between the inner plate 37 and the lower arm 8, and the inner plate 37 is fitted and fixed to the connecting shaft 10. This inner plate 37 and lower arm 8
A forward tilting shaft 38 projecting to the outside of the vehicle is pivotally supported by, and a forward tilting operating lever (second operating lever) 39 extending downward is connected to the forward tilting shaft 38.

A base 40a of a band-shaped stopper arm 40 is fixed to the forward tilting shaft 38 between the lower arm 8 and the inner plate 37. This stopper arm 40
Is a stopper spring 4 installed between the inner plate 37 and a spring support portion 40b formed to project on the base portion 40a.
It is urged to rotate forward by 2. Further, the stopper arm 40 is restricted from rotating forward and rearward by front and rear restricting portions 37a and 37b formed by cutting and raising the inner plate 37.

A stopper plate 41 is pivotally supported on the connecting shaft 10 between the lower arm 8 and the inner plate 37. The stopper plate 41 has the fixing pin 15
The stopper plate 41 is adapted to rotate integrally with the upper arm 9 by this. The stopper plate 41 is provided with a stopper surface 41a, which is in contact with the upper end surface 40c of the stopper arm 40, and has a stepped notch.

As a result, when the seat back 6 in the seated position A pivots forward, the stopper surface 41 of the stopper plate 41 contacts the upper end surface 40c of the stopper arm 40, whereby the seat back 6 is tilted forward and walked in the position C. Regulated by. When the forward tilting operation lever 39 is rotated rearward in this state, the stopper arm 40 rotates and the engagement with the stopper plate 41 is released. As a result, the seat back 6 can be moved forward to the folding position D.

Next, a method of operating the seat device of this embodiment will be described.

In order to bring the seat back 6 at the seating position A forward and bring it to the walk-in position C, the recliner operating lever 20 is pivoted rearward (see FIG. 14 (a)). Then, the cam plate 26 allows the ratchet 24 to rotate downward to release the meshing with the upper arm 9, the seat back 6 rotates forward by the return spring 16, and the stopper plate 41 contacts the stopper arm 40. Thus, the seat back 6 is tilted forward and restricted to the walk-in position C (see FIGS. 4 to 8).

With the forward rotation of the seat back 6, the lock release plate 35 rotates, and the lock release pin 36 rotates the first lock plate 30 and the second lock plate 31 upward. Accordingly, the inner cable 12a is pulled up, and the lock of the seat slide lock mechanism 5 is released. As a result, the seat cushion 4 and the seat back 6 can be moved back and forth, and the rear seats can be loaded and unloaded (see FIG. 14B).

In order to move the seat back 6 forward from the forward tilt walk-in position C to the folding position D, the forward tilt operation lever 39 is rotated backward (FIG. 1).
4 (c)), the stopper arm 40 rotates to release the engagement with the stopper plate 41, and the seat back 6 can be tilted forward (see FIG. 8). When the seat back 6 is rotated further forward in this state, the lock release pin 36 moves over the lock plate 30 and moves rearward while rotating the first lock plate 30 rearward (FIG. 9). reference). As a result, the first and second lock plates 30 and 31 rotate downward to allow the inner cable 12a to contract and lock the seat slide lock mechanism 5. Further, the claw teeth 24a of the ratchet 24 mesh with the restriction teeth 9c of the upper arm 9, and the seat back 6 is tilted forward and restricted to the folding position D (FIGS. 10 and 11).
reference). In this way, the back surface 6a of the seat back 6 is used as a table or a cargo bed (see FIG. 14D).

In order to return the seat back 6 from the forward folding position D to the seating position C and further to the full flat position B, the recliner operating lever 20 is rotated to raise the seat back 6 (FIG. 14 (e)). reference),
Rotate further rearward. Then, the seat back 6 rotates to the full flat position B where it is substantially flush with the seat cushion 4, and the engaging teeth 9b of the upper arm 9 mesh with the pawl teeth 24a of the ratchet 24, so that the seat back 6 is fixed at this position. The Rukoto.

As described above, according to the present embodiment, the connecting shaft 10 that supports the seat back 6 rotatably in the vehicle front-rear direction.
Is disposed above the upper surface 4a of the seat cushion 4, and when the seat back 6 is tilted forward and rotated to the walk-in position C, the seat slide lock mechanism 5 is unlocked, and the seat back 6 is tilted forward to the folding position D. Since the seat slide lock mechanism 5 is locked when the seat back 6 is rotated, the seat back 6 is moved between the seating position A, the full flat position B, the frontward walk-in position C, and the frontward folding position D by the single connecting shaft 10. It can be rotatably supported, the number of parts can be reduced and the structure can be simplified as compared with the case of adopting the conventional two-stage folding structure. As a result, cost can be reduced and
It can prevent malfunction.

In this embodiment, the recliner operating lever 2
The seat back 6 is unlocked by the turning operation of 0, the seat back 6 is tilted forward by the stopper arm 40 and the stopper plate 41 to be restricted to the walk-in position C, and the stopper arm 40 is rotated by the tilting operation lever 39. Disengage from the stopper plate 41 to release the seat back 6 from the forward tilting walk-in position C.
Since the seat back 6 can be tilted forward and turned to the folding position D, the tilting operation can be performed with a simple structure.

When the seat back 6 is tilted forward and rotated to the walk-in position C, the lock release pin 36 rotates the second lock plate 31 to the lock release position, and further tilted forward to rotate toward the folding position D. Since the lock release pin 36 is disengaged from the first lock plate 30 and thereby the first and second lock plates 30 and 31 are pivotally returned in the locking direction, the seat lock is released and returned with a simple structure. Can be realized.

By rotating the recliner operating lever 20 and the forward tilting operating lever 39, the seat back 6 can be easily switched from the seating position A to the forward tilting walk-in position C and the forward tilting folding position D, which provides a feeling of moderation. Certain operations are possible.

[Brief description of drawings]

FIG. 1 is a side view illustrating a vehicle seat device according to an exemplary embodiment of the present invention.

FIG. 2 is a rear view of the seat device as seen from the rear of the vehicle.

FIG. 3 is a side view for explaining the operation of the seat device.

FIG. 4 is a side view of the internal components of the seat device in the seated position as seen from the outside of the vehicle.

FIG. 5 is a side view of the outside component of the seat device in the seated position as viewed from the outside of the vehicle.

FIG. 6 is a side view of the inside components of the seat device in the seated position as viewed from the outside of the vehicle.

FIG. 7 is a side view of the outer component of the seat device in the seated position as viewed from the outside of the vehicle.

FIG. 8 is a side view of the inside components of the seat device at the forward walk-in position as seen from the outside of the vehicle.

FIG. 9 is a side view of the outside component of the seat device in the forward-walking-in position as seen from the outside of the vehicle.

FIG. 10 is a side view of the inside components of the seat device in the frontward walling position as seen from the outside of the vehicle.

FIG. 11 is a side view of the outside component of the seat device in the forward warding position as seen from the outside of the vehicle.

FIG. 12 is a side view of the inside components of the seat device in the full flat position as seen from the outside of the vehicle.

FIG. 13 is a side view of an outer component viewed from the outside of the vehicle of the seat device in a full flat position.

FIG. 14 is a diagram for explaining a method of operating the seat device.

FIG. 15 is a side view of the seat device.

[Explanation of symbols]

1 seat device 4 seat cushion 5 Seat slide lock mechanism 6 seat back 8 lower arm 9 Upper arm 10 connection shaft 20 Recliner operating lever (first operating lever) 30, 31 First and second lock plates 36 Lock release pin 39 Forward operation lever (second operation lever) A sitting position C Forward walk-in position D Forward folding position

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takeo Fujishima             Toyonaka, Toyonaka, Osaka Prefecture             Shishi Sheet Co., Ltd. F term (reference) 3B087 BA02 BC09 BD01 CB12

Claims (2)

[Claims] 1. A vehicle seat apparatus comprising a seat slide lock mechanism for locking a seat cushion slidably arranged in a vehicle front-rear direction at a desired front-rear direction position, wherein a lower arm fixed to the seat cushion and a seat. An upper arm fixed to the back is rotatably connected via a connecting shaft disposed above the upper surface of one of the seat cushions, and the seat back is seated at a position where an occupant can sit, and a rear occupant. The seat back is pivotally supported between a forward walk-in position that enables passengers to get in and out of the seat back and a forward-folding folding position where the back surface of the seat back is substantially horizontal, and the seat back is rotated to the forward tilt walk-in position. Occasionally, the seat slide lock mechanism is unlocked, and the seat back is moved forward to fold. A seat device for an automobile, wherein the seat slide lock mechanism is configured to be locked when the seat slide lock mechanism is rotated to a position. 2. The vehicle seat of claim 1, wherein the seat back is fixed to the seating position by operating the first operation lever, and the seat back is regulated to the position when the seat back is tilted forward and rotated to the walk-in position. 2 The seat back rotation mechanism that releases the regulation of the forward tilt walk-in position by operating the operation lever and allows the rotation to the forward tilt folding position, and the seat slide lock mechanism that is pivotally supported by the lower arm. A lock plate connected via a slide cable and a lock release pin fixed to the upper arm are provided, and the lock release pin moves the lock plate to the lock release position when the seat back is tilted forward and rotated to the walk-in position. When the seat back is turned forward and the seat back is turned to the folding position, A seat lock operating mechanism for disengaging a lock release pin from a lock plate to pivotally return the lock plate to a lock position.