JP2003040010A - Vehicle seat with tip-up mechanism - Google Patents

Abstract

(57) [Summary] [Object] To improve the appearance quality of a vehicle seat with a tip-up mechanism. [Structure] A plate-shaped side frame (2A) of a cushion frame (2) is pivotally attached to the inside of a base bracket (1) integral with a movable rail (91) of a slide rail so as to be vertically rotatable. Lock mechanism (5) (7) that constitutes a tip-up mechanism inside frame (2A)
Is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat provided with a tip-up mechanism.

[0002]

2. Description of the Related Art A conventional liya seat mounted on a so-called one-box car or the like has a tip-up mechanism that causes a rear portion of a seat cushion to jump up around a center of rotation and fold the seat cushion to stand up along a seat back. is there.

By folding the seat cushion and moving the entire seat forward by the slide rail, the space inside the vehicle is expanded, and the load capacity of the luggage can be increased, or by moving the seat backward, the seat cushion in the front seat can be increased. There is an advantage that the seatable range in the front-rear direction can be expanded.

[0004]

In the seat with the tip-up mechanism for jumping up the seat cushion in the above conventional products, the seating surface of the seat cushion is always fixed at a constant angle in use.

That is, in a seat with a tip-up mechanism, a tilt mechanism capable of adjusting the tilt angle of the seat cushion is not mounted. This is because if the tilt mechanism is provided on the seat with the tip-up mechanism, the appearance quality of the seat is impaired and the mechanism becomes complicated.

Therefore, when the seat is in use, the height, inclination angle, etc. of the seat cushion on the seating surface cannot be adjusted, resulting in poor usability of the seat.

Further, in the conventional product, a leg portion for slidably supporting the seat cushion on the slide rail is formed in a box shape separately from the seat cushion, and a tip-up mechanism is provided therein (for example, Japanese Patent Laid-Open No. Hei 3). -23752
No. 9).

Therefore, the leg portion becomes thicker, and the appearance quality of the sheet is impaired.

Therefore, an object of the present invention is to eliminate the above-mentioned problems of the conventional product in a vehicle seat with a tip-up mechanism.

[0010]

To achieve the above object, a vehicle seat with a tip-up mechanism according to the present invention is fixed to a movable rail side of a pair of left and right slide rails and a seat cushion is provided on the front side. A base bracket for mounting the seat back on the rear side, a plate-shaped side frame in a cushion frame of a seat cushion pivotally rotatably vertically inside the pair of left and right base brackets, and a side frame of the cushion frame. It is configured to have a link mechanism arranged between the base brackets and a lock mechanism that is mounted inside one or both of the side frames to lock the side frames to the base bracket.

With the above construction, the tip-up mechanism is built in the seat cushion, and the tip-up mechanism is not exposed to the outside.

Further, since the tilt mechanism composed of the ratchet mechanism is provided on the sector gear and the lock plate, a part with the tip-up mechanism can be used as the tilt mechanism and the inclination angle of the seat cushion can be adjusted.

By providing a tilt mechanism composed of a ratchet mechanism on the center gear and the lock plate, the front portion of the seat cushion can be adjusted to be higher without using the operation lever.

Further, since the base plate is provided with a support portion for supporting the lower end of the link plate during normal use of the seat, a part of the load of the seat cushion is borne by the base plate side, and the lock mechanism is provided. The applied load can be reduced.

In addition, when tipping up the height of the seat cushion from the uppermost position to the edge of the gap plate, the guide pin provided on the lock plate is pushed up so that the spring direction of the lock plate and the spring is adjusted. By providing a lock-off edge for moving in the unlocking direction and a lock edge for engaging the lock plate with the center gear when the guide pin abuts when the seat cushion is returned from the tip-up state to normal use. It is possible to accurately lock and unlock the cushion frame with respect to the base plate.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 3, a vehicle seat with a tip-up mechanism according to the present invention is slidably mounted on a pair of left and right elongated fixed rails (90) fixed to a vehicle floor (F), and a fixed rail ( The base bracket (1) is integrally fixed to the movable rail (91) slidably engaged with the base bracket (1).
Seat cushion (SC) and seat back (SB)
Is installed.

The seat cushion (SC) is tilted about a pivot (14) by a tilt mechanism described later from a substantially horizontal state so that the front portion becomes higher, and is lifted by a tip-up mechanism to be shown by a chain line. Thus, the seat cushion (SC) can be folded upright.

The upright seat back (S
By sliding the seat cushion (SC) to B) and sliding it to the front end side of the fixed rail (90),
It is configured so that a large cargo space can be secured behind the seat. Further, by sliding the seat to the rear end side of the fixed rail (90), the space in front of the seat is enlarged, and the seat arranged in front of the seat can be moved backward. .

The tilt mechanism, the tip-up mechanism and the lock mechanisms thereof are constructed as shown in FIGS. 1 and 2.

FIG. 1 is an exploded view, and FIG. 2 is an assembly view. In the figure, (1) is fixed to the movable rail (91) side of the pair of left and right slide rails (90) and (91) and the seat is attached to the front side. The base bracket to which the cushion (SC) and the rear seat back (SB) are attached is shown.

In the figure, (2) is a cushion frame of a seat cushion (SC) in which a rear part is pivotally attached by a pivot (14) to the inside of each of the pair of left and right base brackets (1) described above. Shows (2A) in the figure
(2A ') is a plate-shaped side frame of the cushion frame (2), (2B) and (2B) are side frames (2).
A) A connecting frame made of pipe for integrally connecting the front and rear of (2A ′).

The left and right side frames (2A) (2) of the above base bracket (1) and cushion frame (2)
Link plate (3) and link (4) between A ')
A link mechanism consisting of and is provided.

An upper end of the link plate (3) is rotatably attached to the rear side of the side frames (2A) and (2A ') and is arranged along the base bracket (1).

A front end of the link (4) is rotatably attached to the lower part of the link plate (3) by a rivet (33), and a rotary shaft (1) is attached to the rear end of the base bracket (1).
It is rotatably connected by 5).

In the figure, (5) shows a sector gear integrally fixed to a fixed shaft (60) rotatably mounted on the one side frame (2A), and the fixed shaft (60) has a gap plate (6). ) Is a sector guy (5)
It is stuck and fixed on the inside of. The upper end of the link plate (3) is also welded to the fixed shaft (60). Fixed shaft (60) is side frame (2A)
The support piece (2) fastened with many bolts (21) on the inside of the
It is rotatably installed between C) and the side frame (2A).

In the figure, (7) is swingably pivotally attached to the inner wall of the side frame (2) by a pin (72) and is biased by a spring (75) in the engagement direction of the sector gear (5), 1 shows a lock plate integrally provided with a guide pin (71) that is disengaged in the unlocking direction by hitting the gear plate (6).

The above lock plate (7) and sector gear (5) constitute a lock mechanism to hold the seat cushion (SC) in the tilted state and the tip-up state. That is, the tooth portion (70) of the lock plate (7) meshes with the ratchet tooth (50) of the sector gear (5) to maintain the tilted state, and the tip up tooth (51) of the sector gear (5) is retained. By engaging with each other, the tip-up state of the seat cushion (SC) is maintained.

The gap plate (6) and (74) in the figure
Reference numerals (81), (82), (85) ... denote lock release members for releasing the locked state by the lock mechanism.

As the fixed rail (90) which constitutes the above slide rail and is fastened to the vehicle floor (F), a long long rail is used so that the longitudinal movement range of the seat becomes large. A movable rail (91) slidably fitted to the fixed rail (90) has the base bracket (1) integrally fixed to the upper portion thereof.

The base bracket (1) is integrally formed with a support portion (13) which is bent inward at a substantially right angle at the lower end of the front portion thereof. In addition, (12) and (12) in the drawing show fastening holes for arm attachment, and a seat back (SB) is attached to this arm by a reclining device or the like. (1
Reference numeral 0) is an insertion hole of the pivot shaft (14), (11) is an attachment hole of the link (4), and the rotation shaft (15) is inserted into the attachment hole (11).

A through hole (20) through which the pivot shaft (14) is rotatably inserted in the side frames (2A) and (2A ').
A through hole (26) through which the fixed shaft (60) passes is opened.

The left and right link plates (3) (3 ')
Are integrally connected by a connecting rod (32) via a mounting bracket (31). (31A) (31A) (34 in the figure
A) (34A) is a fastening hole for the bolts (34) (34),
Reference numerals (33A) and (43A) respectively denote insertion holes of the pins (33). At the lower ends of the link plates (3) and (3 '), the support portion (13) of the base bracket (1) is provided.
A bent portion (30) which is brought into contact with and supported by the is integrally formed.

At the rear end of the link (4), there is provided a bent portion (40) which is supported by abutting against the support portion (13) of the base bracket (1) when the seat cushion (SC) is used.

The above-mentioned link plate (3) and link (4) are mounted inside the left and right base brackets (1), and the rear end of one of the links (not shown) is attached to the base bracket (not shown). It is rotatably attached.

As shown in FIGS. 4 and 5, the sector gear (5) has ratchet teeth (50) for tilting on the front side and tip-up teeth (51) for tip-up on the rear side, and meshes with this. So that the teeth (70) of the lock plate (7) rotate clockwise with respect to the sector gear (5) in FIG. 4, that is, the front side of the cushion frame (2) rotates in the upward direction and The lock plate (7) is configured so as not to rotate in the direction.

Therefore, the ratchet teeth (51) of the sector gear (5) and the lock plate (7) form a tilt mechanism composed of a ratchet mechanism, and the seat cushion (SC) is provided between L shown in FIG. It is formed to be tilted.

Therefore, the seat cushion (S
When C) lifts the front side of the seat cushion (SC) upward from a substantially horizontal state, the link plate (3) rises together with the link (4) to rotate the sector gear (5), as shown in FIG. The seat cushion (SC) is tilted so that the front side of the seat cushion (SC) becomes higher.

After tilting, the tooth portion (70) of the lock plate (7) meshes with the ratchet tooth (51) of the sector gear (5) by the elasticity of the spring (72) to maintain the tilted state. In order to adjust the height of the front portion of the seat cushion (SC) from this state, the lock release members (74) (81) (8) are formed.
2) (85) ... are provided.

The illustrated unlocking member is a swinging piece (7
4), a rotating piece (81), a rod (82), a release lever (85), etc., and the swinging piece (74) has a window hole (through which a pin (73) provided in the lock plate (7) is inserted. 74
A) and a window hole (74B) through which a pin (81B) provided on the rotating piece (81) is inserted, and the rocking pin (72) allows the lock plate (7) to rock in the front-rear direction. It is mounted inside the side frame (2A).

Further, the rotating piece (81) has a rotating pin (81
A) is rotatably pivotally attached to one end of which the rod (82) is connected, and the other end of the rod (82) is attached to a movable shaft (83). The movable shaft (83) is attached to a rotating piece (86). The rotating piece (86) is rotatably attached to the support shaft (84) having one end attached to the side frame (2A), and the release lever (85) is attached to the rotating piece (86). .

Therefore, when the release lever (85) is operated upward, the rod (82) is pulled to rotate the rotating piece (81), and the swinging piece (74) is rotated in the same direction to lock the lock plate. (7) is formed so as to be movable in the unlocking direction.

The gap plate (6) fixed to the fixed shaft (60) together with the sector gear (5) has a substantially numeral "3" shape, and each convex portion is located on the gear side of the sector gear (5). As described above, they are integrally fastened to each other by being superposed on the inside of the sector gear (5).

Each convex portion (6) of the above-mentioned gap plate (6)
2) (63) (64), as shown in FIGS.
It is arranged so as to project from the end edge of the sector gear (5), the front convex portion is the first convex portion (62), the intermediate convex portion is the second convex portion (64), and the rear convex portion. Is the third convex portion (63), the edge of the second convex portion (64) on the side of the first convex portion (62) is the lock-off edge (64A), and this lock-off edge (64A) is illustrated. As described above, when the cushion frame (2) is raised, the guide pin (71) of the lock plate (7) moves along the lock-off end edge (64A), and the lock plate It is formed to release the engagement state of (7) with the sector gear (5).

In addition, the second protrusion in the first convex portion (62)
The edge of the convex portion (64) side is the lock edge (62A), and when the cushion frame (2) is returned from the tip-up state to normal use, the guide pin (71) of the lock plate (7) is locked by the lock edge. The lock plate (7) is configured to hit the edge (62A) and engage with the sector gear (5).

The third convex portion (63) is formed in a hook shape so that the tip end faces the second convex portion (64) side, and the guide pin (7) of the lock plate (7) in the tip-up state.
1) enters the accommodation recess (63A) to prevent the lock-off state from shifting.

Therefore, the chip-up mechanism is constituted by the above-mentioned gap plate (6), sector gear (5), lock plate (7), link plate (3), link (4) and the like.

Next, the operation of the seat with the tip-up mechanism will be described. First, during normal use of the seat (state shown by the solid line in FIG. 3), the lock plate (7) on the side frame (2A) side is spring (72) as shown in FIGS. 4 and 5.
Due to the elasticity of, the ratchet teeth (5) of the sector gear (5)
It meshes with 1).

Therefore, since the fixed shaft (60) integrated with the sector gear (5) is fixed and the link (4) integrally connected to the fixed shaft (60) is also fixed, the cushion frame (2) is locked. Thus, the substantially horizontal state is maintained.

From this state, as described above, the front side of the cushion frame (2) is lifted in the direction of the arrow in FIG. 4 so that the front portion of the seat cushion (SC) is tilted so as to be higher, and the release lever (85). By operating, the locked state is released and the front side of the cushion frame (2) can be lowered.

When the cushion frame (2) is further lifted from the uppermost position (the state shown in FIG. 5) of the cushion frame (2), the lock plate (7) rotates clockwise, The guide pin (71) of the lock plate (7) is attached to the lock-off edge (64
It is pushed up by A) and gets over the second convex portion (64). Therefore, the engagement state of the lock plate (7) with the sector gear (5) is released. Since the lock plate (7) also rotates clockwise, the spring direction of the spring (72) with respect to the lock plate (7) is changed from the counterclockwise direction shown to the clockwise direction.

As a result, the cushion frame (2) shifts to the tip-up, and further the cushion frame (2).
When is lifted, the pivot (25) is rotated about the rotation center to be in the tip-up state shown in FIG. 6, and the seat cushion (SC) is folded upright along the upright seatback (SB). The guide pin (71) of the lock plate (7) moves along the locus shown by the chain line in FIG.

When shifting to the tip-up state, since the guide pin (71) of the lock plate (7) is guided by the third convex portion (63) of the gear plate (6), the spring direction of the spring (72). Changes to the direction of the sector gear (5), the tooth portion (70) of the lock plate (7) meshes with the tip-up teeth (52) of the sector gear (5) and is locked, and the tip-up state is maintained.

Then, the release lever (85) is moved to the spring (7
When the lock plate (7) is rotated by operating against the elasticity of 2), the locked state of the tip-up is released as shown in FIG.

Next, when the seat cushion (SC) is tilted forward from the folded state, the side plate (2A) and the lock plate (7) move counterclockwise.
The guide pin (71) of the lock plate (7) moves along the locus shown in FIG. 7 to move the first protrusion (6) of the gap plate (6).
It hits the lock edge (62A) formed in 2) and shifts to the use state of the seat cushion (SC) shown in FIG. 4, and the ratchet teeth (51) of the sector gear (5) and the tooth portion of the lock plate (7). (70) meshes and enters a locked state.

As a result, the use state of the seat cushion (SC) is maintained. In this usage state, the bent portion (30) of the link plate (3) and the bent portion (40) of the link (4) are the support portions (1) of the base bracket (1).
0) is supported by contacting the seat cushion (SC), part of the load applied to the seat cushion (SC) is released from the link plate (3) and the link (4) to the base bracket (1), and the sector gear (5) ), The load applied to the lock plate (7) can be reduced.

[0056]

According to the first aspect of the present invention, since the tip-up mechanism is provided inside the side frame of the cushion frame, the tip-up mechanism is built in the seat cushion, and when the seat cushion tip-ups. The tip-up mechanism is not exposed to the outside, and the appearance quality of the sheet can be improved.

According to the second aspect of the invention, since the tilt mechanism is incorporated in the tip-up mechanism, the structure is simplified. Moreover, since the tip-up mechanism does not project, the appearance quality of the seat is not impaired. Further, the height of the seat cushion can be freely adjusted by the tilt mechanism in the use state of the seat cushion, and the usability of the seat can be improved.

According to the third aspect of the present invention, the height of the seat cushion can be adjusted high without operating the lock release lever.

According to the third aspect of the present invention, the load applied to the lock mechanism is borne by the base plate, so that the lock mechanism does not break down.

According to the fifth aspect of the invention, when the seat cushion is changed from the use state to the tip-up state,
The seat cushion can be reliably locked in a reliable and easy manner, and the seat cushion can be reliably locked in the transition from the tip-up state to the use state.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of the present invention.

FIG. 2 is a partially cutaway perspective view of a main part.

FIG. 3 is an explanatory diagram illustrating movement of a seat cushion.

FIG. 4 is a partially cutaway side view of a main part of the seat cushion in a used state.

FIG. 5 is a partially cutaway side view in a tilted state from the state of FIG.

FIG. 6 is a partially cutaway side view of a main part in a state where the seat cushion is chipped up.

FIG. 7 is a partially cutaway side view of a main part in a state where the lock is released in the state of FIG.

[Explanation of symbols]

1 base bracket 2 cushion frame 3 link plates 4 links 5 Center Ga 6 Ga Plate 7 Lock plate 90 Slide rail fixed rail

Claims (5)

[Claims] 1. A pair of left and right slide rails, a base bracket which is fixed to the movable rail side and has a seat cushion on the front side and a seat back on the rear side, and a vertical rotation inside the pair of left and right base brackets. A plate-shaped side frame in a cushion frame of a seat cushion that is freely pivoted, a link mechanism arranged between the side frame of the cushion frame and a base bracket, and a side frame mounted inside one or both of the side frames. A vehicle seat with a tip-up mechanism having a lock mechanism that locks the vehicle to the base bracket. 2. The link mechanism includes a link plate having an upper end rotatably connected to a side frame, and a link having one end pivotally attached to a lower part of the link plate and the other end swingably connected to the base bracket. The locking mechanism includes a center gear and a gear plate integrally fixed to a fixed shaft rotatably attached to a side bracket and fixed to the side plate, and the lock mechanism pivotably attached to the side frame. A lock plate having a guide pin that is urged by a spring in the engagement direction of the sector gear and is released in the lock release direction by hitting the gap plate, and a lock plate attached to the lock plate to lock the sector plate to the sector gear. A vehicle with a tip-up mechanism according to claim 1, comprising an operating lever for releasing the lever. Sheet. 3. The vehicle seat with a tip-up mechanism according to claim 1, wherein the sector gear and the lock plate are provided with a tilt mechanism including a ratchet mechanism. 4. The vehicle seat with a tip-up mechanism according to claim 1, wherein the base plate is provided with a support portion for supporting a lower end of the link plate during normal use of the seat. 5. When the height of the seat cushion is chipped up from the uppermost position to the edge of the gap plate, the guide pin provided on the lock plate is pushed up to move the spring direction of the lock plate and the spring. A lock-off edge for moving in the unlocking direction, and a lock edge for engaging the lock plate with the sector gear when the guide pin abuts when the seat cushion is returned from the tip-up state during normal use. A vehicle seat with the tip-up mechanism described in 1.