JP2002316564A - Seat device for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat device for an automobile to enable smooth return of a back rest part from a walk-in position to a seating position without operating a lever, etc., to release engagement of a gear. SOLUTION: A latch 50 having a latch gear 53 and a stopper pin 54 is rockably attached to a back bracket 40. As a result of the latch gear 53 being engaged with a base bracket 10, a seating position gear 22 and a table position gear 23 to hold the back bracket 40 in a seating position and a table position and a gear disc 20 having a running surface 24 with which the latch gear 53 makes slide contact is fixed between the gears. A stopper 12 is formed to hold the back bracket 40 in a walk-in position as a result of the stopper pin 54 making contact with the base bracket 10.

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 in which a backrest is tiltable in the front-rear direction, and in particular, the backrest can be tilted forward to get on and off a rear seat. The present invention relates to an automobile seat apparatus having a structure in which a seat can be used as a table or the like by tilting the seat further forward from the forward tilt position.

[0002]

2. Description of the Related Art A reclining seat of a type in which a backrest portion of a seat can be tilted forward and a rear seat can be used or a passenger can get out of a vehicle from a rear seat using a space vacated behind the seat is a walk-in seat. Conventionally, it is widely applied to front seats in two-door vehicles and second seats in four or more-door models such as one-box vehicles and minivans. In recent years, when the backrest is moved further forward from the walk-in position, it becomes almost horizontal,
There is also provided a seat having a highly advantageous structure in which the back of the backrest can be used as a table or a floor of a luggage compartment.

[0003] In the reclining seat, a backrest portion is generally supported by a seating portion so as to be tiltable via a tilting shaft, and a movable gear on the backrest portion engages with a fixed gear on the seating portion side so that the backrest portion can be arbitrarily set. When the engagement of the movable gear with the fixed gear is released by a lever or the like, the backrest can be tilted. Also, in the above walk-in seat, the backrest is normally urged forward by a spring or the like in the forward tilt direction. It is configured to stop at. In this walk-in position, the gears are not meshed, and the rearward tilting operation toward the seating position is free. That is, when the backrest is returned from the walk-in position to the sitting position, the operation of the lever and the like is unnecessary.

[0004]

However, reclining seats that are horizontal and can be used for tables and the like when the backrest portion is tilted forward from the walk-in position as described above are characterized by structural characteristics. There has been a structure in which the gear is held so as not to be tilted even at the walk-in position by engagement of the gears. Therefore, in this structure, when the backrest is returned from the walk-in position to the seating position, it is necessary to release the meshing of the gears by operating a lever or the like. Since such an operation is unnecessary in a normal walk-in seat as described above, it may happen that the user cannot return the backrest without operating the levers or the like and cannot perform the operation. I was sometimes dissatisfied.

Accordingly, the present invention provides a structure in which the backrest can be moved to three horizontal positions in addition to a normal sitting position and a walk-in position (forward leaning position).
It is an object of the present invention to provide an automobile seat device capable of smoothly returning a backrest portion from a walk-in position to a seating position without operating a lever or the like for releasing gear engagement.

[0006]

SUMMARY OF THE INVENTION The present invention provides a backrest portion which is tiltably supported on a seating portion via a tilting shaft, a seating position tilted rearward by a predetermined angle, a forward tilting position tilted forward by a predetermined angle,
What is claimed is: 1. A vehicle seat device comprising: a holding mechanism that holds a position at one of a horizontal position that is most inclined forward; and a release mechanism that releases a holding action of the holding mechanism to make a backrest part tiltable. The holding mechanism regulates the backrest so that the backrest cannot tilt in the sitting position and the horizontal position when the release mechanism is not in operation, but restricts the backrest from further tilting forward from the forward leaning position in the forward leaning position. However, it is possible to allow the vehicle to lean backward to a seating position.

According to the holding mechanism of the present invention, the backrest is held in a state in which the backrest does not tilt in any of the front and rear directions in the sitting position or the horizontal position when the release mechanism is not operated. In the forward leaning position, further forward leaning from the forward leaning position is restricted, but the backward leaning to the seating position is possible. That is, the backrest can be smoothly returned from the forward tilt position to the sitting position without operating the release mechanism.

As the holding mechanism of the present invention, the following specific examples are given. An engaging member which is swingably attached to the backrest via a swinging shaft parallel to the tilting shaft, and which is provided with an engaging gear and a stopper pin on the swinging end side; An engagement mechanism that engages with the engagement gear and the stopper pin, the engagement mechanism includes a seating position gear that holds the backrest in a seating position by engagement of the engagement gear, and an engagement gear. A gear member having a horizontal position gear that holds the backrest in a horizontal position by engaging the gear, a sliding member formed between the seating position gear and the horizontal position gear, and the engaging gear slidingly contacting the stopper; A stopper that holds the backrest portion in the forwardly inclined position by contacting the pin, and retracts the engagement gear from the horizontal position gear while the backrest portion is inclined from the horizontal position to the forwardly inclined position,
A biasing mechanism for biasing the engaging member toward the engaged mechanism,
The release mechanism is a mechanism for separating the engaging member from the engaged mechanism against the urging mechanism.

In a preferred embodiment of the present invention, the stopper pin is connected to the engaging member via a reinforcing member. With this configuration, the impact load generated when the stopper pin abuts on the stopper is transmitted to the engaging member via the reinforcing member and dispersed, so that the durability of the stopper pin can be improved.

[0010] Further, by providing a reinforcing member on the bearing portion of the swing shaft that supports the engaging member on the backrest portion, it is preferable that the backrest portion is prevented from being damaged by an impact applied to the stopper pin.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings. (A), (b), (c) of FIG.
Each shows a usage pattern of the seat 1 to which the automobile seat device according to one embodiment is applied. The seat 1 includes a seat cushion (seating portion) 2 and a backrest (back portion) 3. Seat cushion 2
Are slidably supported via a guide rail 4 in the front-rear direction (left-right direction in FIG. 1), which is the forward / backward direction of the vehicle, with respect to the floor 5. Backrest 3
The lower end is supported so as to be tiltable in the front-rear direction with respect to the rear end of the seat cushion 2. This backrest 3
Can be used in three positions: a normal sitting position shown in FIG. 1A, a walk-in position shown in FIG. 1B, and a table position shown in FIG. 1C. .

The above-mentioned seating position is a use position when the occupant normally sits down, and the rearward tilt angle of the backrest 3 is arbitrarily set within a certain range. The walk-in position is a use position when the user uses a space available behind the backrest 3 to get on a rear seat (not shown) of the seat or to get out of the vehicle from the rear seat. It is set to the forward tilt angle. Also, at the table position,
The backrest 3 is tilted further forward from the walk-in position, so that the back surface of the backrest 3 is substantially horizontal, and the back surface can be used as a table.

FIG. 2 shows a seat device 6 according to one embodiment. The device 6 includes a reclining mechanism 7 and an urging mechanism 8 for holding the backrest 3 at any one of the three positions, and a state in which the backrest 3 can be tilted by releasing the operation of the urging mechanism 8. And a release mechanism 9. Hereinafter, these mechanisms 7, 8, and 9 will be described in order.

(1) Reclining Mechanism FIG. 3 is an exploded view of the reclining mechanism 7, and the reclining mechanism 7 will be described below with reference to FIG. The reclining mechanism 7 includes a base bracket (seat portion) 10 fixed to a frame (not shown) of the seat cushion 2.
And a disk-shaped gear disk (gear member) 20 fixed to the base bracket 10, and fixed to a frame (not shown) of the backrest 3, and tilted to the base bracket 10 via a tilt shaft 30 (see FIG. 2). A freely supported back bracket (back portion) 40 and a rear end disposed above the base bracket 10 and whose rear end is swingably attached to the back bracket 40 via a swing shaft 31 (see FIG. 2). And a latch (engaging member) 50.

The base bracket 10 has an insertion hole 11 for the tilting shaft 30 formed therein. A substantially triangular stopper 12 is formed at the front of the base bracket 10. The stopper 12 has a stopper surface 12a on the upper surface side which is slightly inclined forward and an apex 12b.
And a gentle slope surface 12c on the lower side.

At the center of the gear disc 20, a tilt shaft 30
Are formed. Also, gear disk 2
Gears 22 and 23 each having a plurality of teeth are formed at two locations on the peripheral surface of the zero. The gears 22 and 23 are formed so as to be separated from each other on a peripheral surface of the gear disk 20 extending substantially 180 degrees, and a smooth peripheral surface between the gears 22 and 23 in this range corresponds to a latch 50 described later. Is set as the running surface (sliding contact portion) 24 with which the latch gear (engaging gear) 53 slides. Gear disc 2
Reference numeral 0 denotes a state in which one of the gears 22 is directed upward and the other gear 23 is directed forward and slightly downward, and the through holes 11 and 21 are fitted to the base bracket 10 and fixed by fixing means such as caulking. I have.

As shown in FIG. 2, in this fixed state, the stopper 12 of the base bracket 10 is arranged in the area of the running surface 24 of the gear disc 20. Each gear 2
The pitch and the size of the teeth 2 and 23 are the same, but the length, that is, the number of the teeth is the same as the gear 2 above the running surface 24.
2 are greater than the lower gear 23. Hereinafter, the longer gear 22 above the running surface 24 is referred to as a seating position gear 22, and the shorter gear 23 below is referred to as a table position gear (horizontal position gear) 23.

At the edge of the back bracket 40, a frame 41 projecting in the lateral direction is formed. Back bracket 4
The lower end of O is formed in a semicircular shape, and an insertion hole 42 of the tilt shaft 30 is formed at the center of the circular portion. Above and obliquely behind the insertion hole 42, an insertion hole 43 for the swing shaft 31 is formed.

At the rear end of the latch 50, an insertion hole 51 for the swing shaft 31 is formed. A triangular projection 52 is formed on the upper end of the swinging end of the latch 50, and a latch gear 53 that meshes with each of the gears 22 and 23 of the gear disc 20 is formed on the lower surface. Latch gear 5
3 is the length of the table position gear 23 of the gear disc 20.
The length is set to be almost the same. A stopper pin 54 projecting in the lateral direction is formed on the tip end side of the latch gear 53, and an engaging pin 55 also projecting in the lateral direction is formed above the stopper pin 54.

The insertion hole 51 of the latch 50 is aligned with the insertion hole 42 of the back bracket 40 with the stopper pin 54 disposed on the front side and the latch gear 53 facing downward. The swing shaft 31 passes through the swing bracket 31 in the frame 41 of the back bracket 40.
It is supported to swing around. The latch 50
It is constantly urged in the direction of arrow A in FIG. 2 by the urging mechanism 8 described later.

The back bracket 40 to which the latch 50 is attached as described above,
The latch 50 is assembled in a state where the latch 50 is arranged above the gear disk 20 in accordance with the insertion holes 21 and 11 of the base bracket 10 and the base bracket 10. And each insertion hole 11, 21, 4
The back bracket 40 is supported by the base bracket 10 via the tilt shaft 30 so as to be tiltable by passing the tilt shaft 30 through 2. In this state, the gear disc 2
0 is in a state of being stored in the frame 41 at the lower end of the back bracket 40. In the present embodiment, the engaged mechanism according to the present invention is constituted by the gear disk 20 fixed to the base bracket and the stopper 12 formed on the base bracket 10.

According to the reclining mechanism 7, FIG.
As shown in (a), when the latch gear 53 of the latch 50 is engaged with the seating position gear 22 of the gear disc 20, the back bracket 40 is held at the seating position. That is, as shown in FIG. 1A, the backrest 3 is held at the sitting position.

Further, from the state shown in FIG.
Is swung in the direction of arrow B to disengage the latch gear 53 from the seating position gear 22, and the back bracket 40 is tilted forward, as shown in FIG.
The stopper pin 54 contacts and engages with the stopper surface 12 a of the stopper 12 of the base bracket 10. Thereby, the back bracket 40 is held at the walk-in position. That is, as shown in FIG. 1B, the backrest 3 is held at the walk-in position.

Further, from the state shown in FIG. 4B, the latch 50 is swung in the direction of arrow B until the stopper pin 54 reaches a position where the stopper pin 54 can climb over the vertex 12b of the stopper 12, and the engagement of the stopper pin 54 with respect to the stopper 12 is established. If you remove
The back bracket 40 falls forward and stops at the table position as shown in FIG. That is, as shown in FIG. 1C, the backrest 3 is held at the table position. This table position corresponds to the position of the latch gear 53 of the latch 50.
Are held in engagement with the table position gear 23 of the gear disc 20.

(2) Urging Mechanism Next, the urging mechanism 8 will be described with reference to FIG. The urging mechanism is a mechanism for urging the latch 50 in the direction of arrow A in FIG.
0 and a tension spring 80.

The arm member 60 is rotatably attached to the back bracket 40 via a rotation shaft 61.
The arm member 60 includes an upper arm portion 62 and a lower arm portion 63 that project upward, downward, and rearward from the center of rotation.
And a rear arm portion 64. Lower arm 6
Reference numeral 3 overlaps the lateral side (the front side in FIG. 2) of the convex portion 52 of the latch 50. A guide hole 63a having a predetermined shape is formed in the overlapping portion, and the engaging pin 55 of the latch 50 is inserted into the guide hole 63a. Further, a cam 65 that slides on the convex portion 52 of the latch 50 is fixed to the back side of the rotation center of the arm member 60 in FIG.
A link shaft 71 is provided on the upper arm portion 62 of the arm member 60.
One end of the link 70 is rotatably connected via the. This link 70 is attached to the back bracket 40 by the pivot 7
The other end is hooked to the other end of a tension spring 80 whose one end is hooked to the back bracket 40.

According to the biasing mechanism 8, the tension spring 8
The link 70 rotates in the direction of arrow F in FIG.
Following this, the arm member 60 rotates in the direction of arrow C. Then, as shown in FIG. 5A, the cam 65 pushes the convex portion 52 while slidingly contacting the convex portion 52 of the latch 50,
The latch 50 is swung in the direction of arrow A. As a result, the latch gear 53 of the latch 50 is pressed against the peripheral surface of the gear disk 20, and the latch gear 22 meshes with the seating position gear 22 of the gear disk 20. When the arm member 60 rotates in the direction of arrow D in FIG. 2, the engagement pin 55 of the latch 50 is inserted into the guide hole 63a as shown in FIG.
Is guided, the latch 50 rotates in the direction of arrow B, and the latch 50 separates from the gear disc 20. In the present embodiment, the reclining mechanism 7 and the urging mechanism 8 constitute a holding mechanism according to the present invention.

(3) Release Mechanism Next, the release mechanism 9 will be described with reference to FIGS. The release mechanism 9 is, as shown in FIG.
One end is attached to a manual lever 90 provided on the shoulder of the backrest 3 so as to be movable in the longitudinal direction, and to a rear arm 64 of the arm member 60 constituting the urging mechanism 8 as shown in FIG. It comprises a pull cable 91 which is hooked and the other end of which is connected to a lever 90.

According to the release mechanism 9, when the lever 90 is pulled up and the pull cable 91 is pulled, the arm member 6
0 rotates in the direction of arrow D in FIG. This allows
As described above, the latch 50 separates from the gear disc 20. When the lever 90 is released, the arm member 60 returns to the original position by the force of the tension spring 80, and the latch 50 is urged toward the gear disc 20.

The above is the seat device 6 of the present embodiment.
Next, the operation of the device 6 will be described. As shown in FIG. 4A, the latch gear 53 of the latch 50 urged toward the gear disc 20 by the urging mechanism 8
When the backrest 3 is engaged with the zero seating position gear 22, the backrest 3 is held at the seating position as shown in FIG.

Next, in order to set the backrest 3 from the sitting position to the walk-in position, the lever 90 is pulled up,
Flip backrest 3 forward. When the lever 90 is pulled up, the latch 50 swings in the direction of arrow B in FIG. 4A and the engagement of the latch gear 53 with the seating position gear 22 is released, so that the back bracket 40 can be tilted forward.
When the backrest 3 is tilted forward, the stopper pin 54 of the latch 50 contacts the stopper surface 12a of the stopper 12 of the base bracket 10 as shown in FIG.
Thereby, the backrest 3 is held at the walk-in position as shown in FIG. When operating from the sitting position to the walk-in position, the latch gear 53
The lever 90 may be pulled up only for a short time until the leading end of the gear 90 gets on the running surface 24 of the gear disc 20. Thereafter, the latch gear 53 is moved to the seating position gear 2
This is because the latch gear 53 does not engage with the second gear 2 and the running gear 24 slides, so that the back bracket 40 can be tilted.

Next, in order to set the backrest 3 from the walk-in position to the table position, the lever 90 is pulled up until the stopper pin 54 of the latch 50 can move over the vertex 12b of the stopper 12. Then, the engagement of the stopper pin 54 with the stopper 12 is released, and after the stopper pin 54 reaches the top of the stopper 12 as shown in FIG. 6, the back bracket 40 falls forward due to the weight of the entire backrest 3. In the process, the latch gear 53 slides on the slope surface 12c of the stopper 12, and
Finally, it meshes with the table position gear 23 of the gear disc 20 as shown in FIG. Thereby, the backrest 3 is held at the table position as shown in FIG.

The above is the operation of tilting the backrest 3 from the sitting position to the table position via the walk-in position. Next, the reverse operation will be described. To set the backrest 3 from the table position to the walk-in position, raise the lever 90 and raise the backrest 3. When the lever 90 is pulled up, the state of FIG.
Swings in the direction of arrow B to disengage the latch gear 53 from the table position gear 23. When the backrest 3 is raised, the latch gear 53 further moves away from the gear disc 20 by the stopper pin 54 slidingly contacting the slope surface 12c of the stopper 12 toward the vertex 12b. At this stage, since the engagement of the latch gear 53 with the table position gear 23 has already been released, the lever 9
The operation of raising 0 becomes unnecessary. And stopper 1
When the second vertex 12b is exceeded, the stopper pin 54 reaches the stopper surface 12a, and the back bracket 40 returns to the walk-in position.

In order to return the backrest 3 from the walk-in position to the sitting position, it is only necessary to tilt the backrest 3 backward. That is, when the backrest 3 is in the walk-in position, the latch gear 53 of the latch 50 is on the running surface 24 of the gear disc 20, and when the backrest 3 is tilted backward, the latch gear 53 is moved to the running surface of the gear disc 20. Since the backrest 24 slides, the backrest 3 can be tilted backward. The front end portion of the latch gear 53 is the seat position gear 22 of the gear disc 20.
, The latch gear 53 finally engages with the seating position gear 22, and at that stage the backrest 3 is held at the seating position.

According to the seat device 6 of the above embodiment, the holding of the backrest 3 at the walk-in position is not caused by the engagement of the latch gear 53 of the latch 50 with the gear disk 20, but by the stopper pin 54 of the latch 50.
Is brought into contact with the stopper 12 of the base bracket 10. In the range from the walk-in position to the seating position, the latch gear 53 is
The running surface 24 is slid. Thereby, the operation of returning the backrest 3 from the walk-in position to the sitting position is as follows.
Simply tilting the backrest 3 backwards makes the operation smoother, and eliminates the hassle of operating the lever 90.

When the backrest 3 is tilted forward from the seating position, the lever 90 is moved only for a short time while the leading end of the latch gear 53 rides on the running surface 24 of the gear disc 20.
You only need to operate. Thereafter, even if the latch 50 is urged toward the gear disc 20, the latch gear 53 slides on the running surface 24, so that the backrest 3 can be tilted forward to the walk-in position. When raising the backrest 3 from the table position, first, the lever 90 is operated to disengage the latch gear 53 of the latch 50 from the table position gear 23 of the gear disc 20, and then the stopper pin 54 of the latch 50 is moved to the base bracket. 1
The latch 50 is separated from the gear disc 20 by sliding the slope surface 12c of the zero stopper 12 into sliding contact. Therefore, the operation time of the lever 90 may be short, and thereafter, the backrest 3 can be returned to the seating position without any resistance at a stretch.

As described above, the operation of the lever 90 required for tilting the backrest 3 requires only a very short time, and as a result, the backrest 3 can be smoothly tilted without troublesome operation of the lever 90. be able to.

Next, referring to FIG.
Another embodiment in which the way of providing 4 is changed will be described. In addition,
7, the same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

In this case, the stopper pin 54 is not formed on the latch 50 side, and the stopper pin 54 is formed on the elliptical stopper arm (reinforcement member) 100 which is newly incorporated in the latch 50. Stopper arm 100
Are arranged in parallel on the lateral side of the latch 50. An insertion hole 101 into which the swing shaft 31 is inserted is formed at one end of the latch 50, and a stopper pin 54 extending toward the latch 50 is formed at the other end of the latch 50. It is fixed by fixing means. A connection pin 56 projecting toward the stopper arm 100 is formed on a side surface of the latch 50. The connection pin 56 is fitted into a hole 102 formed at the center of the stopper arm 100, so that the stopper arm 100 Are connected integrally with the latch 50.

According to this embodiment, the stopper arm 100 swings together with the latch 50, the stopper pin 54 comes into contact with the stopper 12 of the base bracket 10, and the backrest 3 is held at the walk-in position. When the stopper pin 54 comes into contact with the stopper 12, the stopper pin 54
In the present embodiment, the impact load is transmitted not only to the stopper pin 54 but also to the latch 50 via the stopper arm 100 and the connecting pin 56, and is dispersed.
Therefore, the durability of the stopper pin 54 can be improved. Here, the durability of the latch 50 is improved, but a reinforcing member such as a collar is fitted into a portion around the insertion hole 43 of the back bracket 40 which is a bearing portion of the swing shaft 31 of the latch 50. , Stopper pin 5
4 prevents the back bracket 40 from being damaged by the impact, and improves durability.

[0041]

As described above, according to the present invention,
While the release mechanism is not operated, the backrest is restricted so as not to be tiltable between the seating position and the horizontal position. Because it is a configuration that allows
There is an effect that the backrest can be smoothly tilted from the forward tilt position to the sitting position without operating the release mechanism.

[Brief description of the drawings]

FIG. 1 is a side view showing a use mode of a seat to which a seat device according to an embodiment of the present invention is applied, wherein (a) is a sitting position, (b) is a walk-in position, and (c) is a table position. Is shown.

FIG. 2 is a side view of the seat device according to the embodiment of the present invention.

FIG. 3 is an exploded perspective view of the seat device according to the embodiment of the present invention.

4A and 4B are side views illustrating the operation of the seat device according to the embodiment of the present invention, wherein FIG. 4A illustrates a seating position, FIG. 4B illustrates a walk-in position, and FIG.

FIG. 5 is a side view for explaining the operation of the latch according to the embodiment of the present invention in the order of (a) and (b).

FIG. 6 is a side view showing the operation of the seat device according to the embodiment of the present invention, showing a moment when the stopper pin of the latch gets over the stopper.

FIG. 7 is a perspective view of a seat device according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Seat, 2 ... Seat cushion (seating part), 3 ... Backrest (backrest part), 6 ... Seat device, 7 ... Reclining mechanism, 8 ... Biasing mechanism, 9 ... Release mechanism, 10 ...
Base bracket (seat part), 12 ... stopper, 20 ...
Gear disk (gear member), 22 ... seating position gear, 23
... Table position gear (horizontal position gear), 24 ... Running surface (sliding contact part), 30 ... Tilt axis, 31 ... Swing axis, 40 ...
Back bracket (back portion), 50: latch (engaging member), 53: latch gear (engaging gear), 54: stopper pin, 100: stopper arm (reinforcing member).

Claims (4)

[Claims] A backrest, which is tiltably supported on a seating portion via a tilting shaft, is provided with a backrest tilted by a predetermined angle, a forward tilted position tilted forward by a predetermined angle, and a horizontal position tilted most forward. A holding mechanism that holds the holding mechanism at the position, and a release mechanism that releases the holding action of the holding mechanism to make the backrest part tiltable. In a non-operating state of the mechanism, the backrest portion is restricted so as not to be tiltable between the seating position and the horizontal position, while in the forward tilting position, further tilting from the forward tilting position is restricted, but a seating position. A seat device for an automobile, characterized in that the vehicle seat device is allowed to tilt backward. 2. The engaging member, wherein the holding mechanism is swingably attached to the backrest via a swinging shaft parallel to the tilting shaft, and includes an engaging gear and a stopper pin on a swinging end side. And an engaged mechanism fixed to the seat portion and engaged with the engagement gear and the stopper pin of the engagement member, wherein the engaged mechanism is engaged with the engagement gear. A seating position gear for holding the backrest portion in the seating position, a horizontal position gear for holding the backrest portion in the horizontal position by engagement of the engagement gear, and a gear formed between the seating position gear and the horizontal position gear. A gear member having a sliding portion with which the engaging gear slides, and a stopper pin abutting to hold the backrest in the forwardly inclined position and while the backrest is inclined from the horizontal position to the forwardly inclined position. In, the engagement gear A stopper for retreating from the flat position gear; and a biasing mechanism for biasing the engaging member toward the engaged mechanism, wherein the release mechanism is configured to move the engaging member against the biasing mechanism. The vehicle seat device according to claim 1, wherein the device is a mechanism that is separated from the vehicle seat. 3. The stopper pin according to claim 2, wherein the stopper pin is connected to the engaging member via a reinforcing member.
4. The vehicle seat device according to claim 1. 4. The vehicle seat device according to claim 2, wherein a reinforcing member is provided at a bearing portion of the swing shaft in the backrest portion.