JPH0349714A - Seat with reclining device - Google Patents

Abstract

PURPOSE:To lay down forward the seat-back so that the reverse side of the seat-back becomes roughly horizontal by easy operation by connecting the seat-back to an arm plate with a second hinge so as to be rockable against the arm plate, and providing an angle adjusting mechanism on the arm plate in centering around a second hinge. CONSTITUTION:The seat is constituted so that a seat-back 12 is rockable against an arm plate 26 centering around a second hinge 28 of the seat-back side in addition to a face that it is laid down forward while centering around a first hinge 22 of a reclining device 14. Also, an angle adjusting mechanism 66 for rocking the seat-back 12 is provided on the arm plate of the reclining device. That is, in addition to a fact that the seat-back 12 is laid down forward by the reclining device 14, it adjusts an inclination angle of the reverse side 20 of the seat-back by an angle adjusting mechanism 66 and locks and sets roughly horizontally a seating plate 18 of the reverse side of the seat-back. In such a way, the seating plate 18 of the reverse side of the seat-back can be set roughly horizontally, and a stable seating attitude is always obtained.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a seat with a reclining device attached to a seat cushion so that the seat back can be folded forward via a reclining device, and in particular, a seat with a reclining device attached to a seat cushion so that the seat back can be folded forward. This invention relates to a seat with a reclining device that is used as a seating surface.

[Conventional technology]

For example, a seat with a reclining device is provided as a seat for a car, etc., which is equipped with a reclining device between the seat back and the seat cushion that allows a seated person to arbitrarily tilt the seat back forward and perform a reclining angle of tL[. has been done. In such a seat with a reclining device, a configuration is known in which a seating plate with a cushion body is provided on the back surface of the seat back, and the seating plate can be used as a seating surface when the seat back is folded forward.

In this way, a seat with a reclining device configured such that the back surface of the seat back can be used as a seating surface is installed, for example, as a second seat in a multi-purpose vehicle. For example, by operating the reclining device and folding the seat back forward, the back surface of the seat back of the second seat becomes available for seating, and can be used as a facing seat with the third seat.

Here, in order to obtain a stable seating posture in such a seat with a reclining device, it is preferable to configure the back surface to be approximately horizontal when the seat cushion is folded forward. However, in known reclining devices, the hinge that is the center of the seat back's swing is generally
It is provided on the side of the seat cushion 7a at the lower end of the seat back.

Therefore, the lower end of the seat back comes into contact with the seat cushion at an early stage when the seat back is folded forward, making it difficult to fold the seat back forward thereafter, and the seat back cannot be folded down to a substantially horizontal position. In other words, it is very difficult to make the seating surface on the back of the seat back almost horizontal when reclining the seat back using only the reclining device.

Therefore, for example, a configuration is known in which an angle adjustment mechanism is provided below the seat cushion, which adjusts the inclination angle of the seat cushion, that is, the entire seat, and can set the seating surface on the back of the seat back almost horizontally. There is. With this type of configuration, even if the seat back comes into contact with the seat cushion during the early forward movement and stops in an inclined state, the angle adjustment mechanism can adjust the inclination angle of the entire seat. The surface can be set almost horizontally.

[Problem to be solved by the invention]

As mentioned above, the known seat with a reclining device has a seating surface on the back surface of the seat back, for example,
An angle adjustment mechanism disposed below the seat cushion allows the seating surface to be set approximately horizontally.

However, in such a configuration, the angle adjustment mechanism is disposed below the seat cushion. In other words, in a seat installed in a narrow space, such as the second seat of a multi-purpose vehicle, the range of movement of the occupant is limited, so it is not easy to operate the angle adjustment mechanism after the seat back is tilted forward.

Further, while the reclining device is provided on the side of the seat cushion, the angle adjustment mechanism is provided below the seat cushion.

Therefore, the operation for folding the seat back forward becomes complicated, which is undesirable.

Since the angle adjustment mechanism is configured to be able to adjust the inclination angle of the entire seat, there is a risk that the angle adjustment mechanism becomes larger and more complicated, and the configuration of the entire seat becomes more complicated.

In this invention, the seat back is moved forward so that the back surface of the seat back is almost horizontal with an easy operation, and
The purpose is to provide a seat with a simple reclining device.

[Means to solve the problem]

To achieve this objective, according to the invention, in addition to the first hinge of the reclining device, the seat back is connected to the arm plate by a second hinge, swingable with respect to the arm plate 771. ing. and,
An angle adjustment mechanism for swinging the seat back around the second hinge is provided in the arm play 1.
The back surface of the seat back can be set almost horizontally when the seat back is folded forward.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1(A), in the seat 10 with a reclining device according to the present invention, the seat back 12 is
It is swingably connected to a seat cushion 16 via a pair of left and right reclining devices 14 disposed on both sides of the seat. The seat back 1z of the seat 10 with a reclining device is, for example, a seat back 1z having a cushion body made of urethane foam material or the like.
For example, the reclining device 14 is formed so that the back surface 20 is provided with a reclining surface 20 so that the back surface can be used as a seating surface when the seat back is folded forward (see FIG. 2).
As can be seen from FIGS. 3A and 3B in addition to FIG. The plate is configured to be swingable relative to the base plate. Then, the base plate 24 is fixed to the side of the seat cushion 16, and the arm plate 26 is attached to the seat back 12 as described later.
The seat back is pivotally connected to an extending pin 28 (second hinge) on the side of the seat cushion, and the seat back is swingably connected to the seat cushion.

Here, as shown in FIG. 3(A), the reclining device 14 includes a locking means 30 that locks and holds the seatback 12 in the seated position and the forward folded position, respectively.
For example, at least one of the left and right sides is provided with. The locking means 30 has, for example, a locking groove 32,34 on the outer periphery.
A disc-shaped lock plate 3B fixed to the arm plate 26 with a lock claw 36 that can be engaged with a lock groove.
and a lock arm 40 pivotally attached to the base plate 24.

The lock pawls 38 of the lock arm are formed into two round shapes, and are configured to be able to engage simultaneously with two of the lock grooves 32 and 34 of the lock plate. The lock arm 40 includes, for example, a pressing piece 4 of a reclining lever 42 pivotally mounted adjacent to the base plate 24.
4 and is biased in the direction of engagement with the locking grooves 32, 34 under the biasing force of the biasing means 46 of the reclining lever. As the biasing means 46, for example, a tension coil spring tensioned between the reclining lever 42 and the locking pin 25 on the base plate 24 can be used.

In such a configuration, for example, from the seating position of the seat back I2 as shown in FIG. 3(A), the reclining lever 42 is pulled against the biasing force of the tension coil spring 46 to swing clockwise. Then, the suppressing piece 44 of the reclining lever separates from the lock arm 40, and the lock arm is swung counterclockwise by its own weight. Then, the lock claws 3g-1, 38-2 of the lock arm separate from the lock grooves 32-1, 32-2 of the lock plate, the lock means 30 is unlocked, and the arm plate 26, that is, the seat back 12, is released. It becomes possible to swing. For example, when the operating force of the reclining lever 42 is released after tilting the seatback 12 forward, the suppression piece of the reclining lever is moved under the biasing force of the tension coil spring 46, as shown in FIG. 3(B). 44 presses the lock arm 40.

Then, the lock claws 38-1 and 38-2 of the lock arm engage with the lock grooves 34-1 and 34-2 of the lock plate, and the locking means 30 is opened and the seat back 12 is set in the forward-folding position. (See Figure 2).

With this configuration, the seat back 12 is reliably locked in the forward folded position, so it is possible to prevent the seat back from flapping due to vibrations while driving, and the seat plate (seating surface) 16 on the back of the seat back is fitted with a tube seat. However, the inclination angle of the seat back does not change, so a stable seating posture can be achieved.

Further, as shown in FIG. 3(A), six grooves 3z at the opening of the lock plate are formed at equal intervals. In this configuration, the seat back! 2, the locking means 30 is unlocked, the seat back is swung backwards, and the lock claw 3B-1 is inserted into the lock groove 32-.
If they are engaged in a position other than 1, for example, in the lock groove 32-4, the seat back will be locked in the rearward tilted position as shown by the dashed line. In this way, if the reclining lever 42 is operated and the lock claw 38 of the lock arm is engaged with one of the lock grooves 32 at an arbitrary position,
Since the reclining angle of the seat back 12 can be set arbitrarily according to the preference of the seated person, a good sitting posture can be easily obtained.

Note that the number, shape, etc. of the lock grooves 32, 34 and the lock pawls 38 are not limited to the configuration shown, as long as the mouth/vine grooves and the lock pawls can engage with each other.

Here, in this invention, the seat back 12 is
As shown in Figures (A) and 4 (A), it is swingably attached to the arm plate 26 of the reclining device by an extension pin (second hinge) z8 extending to the seat back side. . The extending pin 28 is, for example, the fifth
As shown in FIG. 6, it is fixed to the side of the seat back frame 50 via a bracket 52 and loosely inserted into the insertion hole 54 of the arm plate 26. In such a configuration, the seat back 12 is swung using the extension pin 26 as a second hinge in addition to the first hinge 22 of the reclining device 14. The seat back frame 50 also includes, for example, a pair of side brackets 5.
6 and having links 58 at both ends, the shaft 60 is installed and pivotally supported between the side brackets with the links extending outside of the side brackets. For example, one end is attached to the side bracket 56 and the other end is attached to the locking pin 6 of the shaft.
The shaft 60 is pivotally supported in a state in which a clockwise biasing force is applied by torsion springs 64 respectively engaged with the shafts 2 (see FIG. 6).

Then, the rocking of the seat back 12 is controlled around the extension pin (second hinge) 28, and the angle at which the seat plate 18 on the back surface can be adjusted almost horizontally when the seat bar is tilted forward is adjusted to 2. ! Adjustment mechanisms 66 are provided on the left and right arm plates 26, respectively, as shown in FIG. 1(B) and FIG. 5. As can be seen from FIG. 5, the angle adjustment mechanism 66 includes, for example, a base bracket 68 bent into a substantially U-shape, and the base bracket is bent to form a gap 1170 with the arm plate 26. It is fixed inside the arm plate. The base bracket 68 has a substantially (1-shaped) guide groove 72, and a locking pin 74 fixed to the other end of the link 58 is loosely inserted into the guide groove.

Further, for example, an arm 76 having locking pieces 78a and 76b each extending in the orthogonal direction and lockable to the locking pin 74 of the link is inserted into the gap 70. and,
When the pivot pin 82 inserted into the insertion hole 78 of the base bracket G8 is inserted into the insertion hole 8f1 of the arm plate via the insertion hole 84 of the arm, the arm 1-7
6 is pivoted within the gap. The arm 76 connects the locking pin 74 of the link with the locking piece 76a, ? gb.

Here, the pivot pin 82 and the insertion hole 84 of the arm are formed, for example, in a circular D: shape with a pair of flat surfaces,
The arm 76 and the pivot pin are integrally and rotatably connected. An operating lever 90 having a recess 88 corresponding to the anti-rotation shape of the pivot pin is connected to the end of the pivot pin 82 extending outward from the arm plate t so as to be interlocked with the arm 76. .

In such a configuration, the operation of the operation lever 90 (in this case, the operation lever and the arm 76 are rotated together, and the locking pin 74 of the link pressed by the locking pieces 76a and 76b of the arm) The seat back 12 is moved along the guide groove 72 of the link while swinging about the shaft 60.The seat back 12 is then swinged about the extension pin 28 and against the arm plate 26.

Note that it is sufficient that the operating lever 10 is provided on at least one of the left and right angle adjustment mechanisms 6. However, the configuration may be such that the operating levers 90 are provided on both the left and right angle adjustment mechanisms 66, respectively.

For example, in the normal seating position of the seat 10 with a reclining device as shown in FIG. 1(A), the locking pin 74 of the link of the angle adjustment mechanism 66 has a torsional Under the bias of the spring 64, the locking piece 76a of the arm is pushed up and is locked to the upper end of the left end 12m of the guide groove 72 in a supported state.

From this state, for example, first, angle adjustment arN
The inclination angle of the seat back 12 with respect to the arm plate 26 is adjusted by operating the operating lever 90 of the sg.

When the operating lever 90 is rotated counterclockwise from the state shown in FIG.
The locking pin 74 is pressed downward against the biasing force of. Then, the locking pin 74 swings the link 58 around the shaft 60 while locking the left end 72a of the guide groove 72.
Move along the guide groove from the top edge of the seat back! 2
is swung counterclockwise around the extension pin 28. Then, when the locking pin 74 of the link moves to the right side of the guide groove 7z and reaches the right end portion 72b, the locking pin is swung under the biasing force of the torsion spring 64, and as shown in FIG.
), it moves to the top of the right end and is locked. Then, the seat back 1 against the arm plate 26
The rocking of No. 2 is inhibited, and as shown in FIG.

The claw 12 is held in a forward-inclined state with respect to the arm plate.

Then, after setting the forward leaning position shown in FIG. 4(A), the reclining lever 42 is operated, and the reclining device M1
When the locking means 30 of No. 4 is unlocked, the seatback I2 is brought into an unlocked state, and the seatback is tilted forward around the hinge 22 of the reclining device.

Then, the seat back 12 is tilted forward with respect to the arm plate 26, and both arm plates are moved forward, so that the seat back does not come into contact with the seat tension at the early stage of the forward movement, as shown in FIG. The seating plate 18 on the back surface of the seat back is set substantially horizontally. And seat back 12 like this
In the forward folded position, the seating plate 18 on the back surface of the seat back is used as a seating surface.

Furthermore, when the reclining device t<-42 is operated in the forward-folding position of the seatback I2 as shown in FIG. It becomes possible to move. Then, the arm plate 26 is swung backward together with the seat back 12 about the first hinge 2z until the locking means 30 of the reclining device is locked in the seated position, as shown in FIG. 4(^). Then, the arm plate is returned to its initial position.

Then, in the state shown in FIGS. 4(A) and 4(B), when the operating lever 90 is operated and the arm 76 is rotated clockwise, the locking piece 76b of the arm engages the locking pin 74 of the link. The guide 7I! is pressed downward, and the locking pin rotates around the shaft 60 while the guide 7I! It is moved along l'12. Then, as the locking pin 74 moves within the guide groove 72 as the arm 7G rotates, the seat backs! 2 is swung clockwise around the second hinge 28. Then, the locking pin 74 of the link is inserted into the guide groove 7.
2 and reaches the left end portion 72a of the guide groove, the locking pin moves into the link 5 under the biasing force of the torsion spring 64.
8, and the locking pin is locked to the upper end of the left end of the guide groove 'Izs, as shown in FIG. 1(B). Then, the swinging force of the seat back 12 relative to the arm plate 26 is blocked, and the seat back is returned to its initial, normal seating position, as shown in FIG. 1(^).

2, according to the seat IO with a reclining device of the present invention, in addition to being able to tilt forward around the first hinge 22 of the reclining device +W14, the seat back! 2 is configured to be swingable relative to the arm plate 26 around a second hinge 28 on the seat back side. An angle adjustment mechanism 66 for swinging the seat back 12 about the second hinge 28 is provided on the arm plate 26 of the reclining device. In other words, the seat back 1z can be tilted forward by the reclining device M14, and the inclination angle of the seat back back surface 2G can be adjusted by the angle adjustment mechanism 66, so that the landing plate 18 on the seat back back surface can be locked and set almost horizontally. Therefore, when using the seating area on the back of the seat back as a seating surface,
A stable sitting posture is always achieved.

Further, the angle adjustment mechanism 66 is provided on the arm plate 26, and since it is sufficient to rotate the operating lever 90 provided on the outside of the arm plate, that is, on the seat back side, the angle adjustment of the seat back back surface 20 is performed. Easy to operate.

Further, the angle adjustment mechanism 66 is configured by fixing a screw 58 having a locking pin 74 to both ends of the shaft 6G of the seat back 12, loosely inserting the locking pin into the guide groove 72 of the base bracket, and connecting it to the operating lever 90. It is sufficient if the locking pin is configured to be movable by the arm 76.

Therefore, the configuration of the angle adjustment mechanism 66 is simplified, and the entire seat can be configured without becoming complicated or large.

In addition, in the embodiment (1), first, the angle adjustment mechanism G6
After the seat back 12 is tilted forward with respect to the arm plate 26, the seat back is tilted forward by the reclining device i\14. However, seat back 12
The procedure for folding the seat back forward is not limited to this, for example, after the seat back is folded forward by the reclining device 14, the angle of the seat back with respect to the arm play) 26 is adjusted to set the seat back's folding forward position. You can.

Further, in the embodiment, the locking means 30 of the reclining device 14 is configured to lock the seatback 12 even when the seatback 14 is folded forward.
is configured to be lockable, but is not limited to this.
The seat back may be locked only when the seat back 12 is in the normal seating position. However, as in the embodiment, if the locking means 30 is formed to be lockable even when the seat back 12 is in the forward folded position, the seat back 12 is prevented from flapping when the seat is seated on the seating plate 18 on the back of the seat back. . Therefore, the seated person is not made to feel uneasy, and a stable sitting posture on the seating plate (seating surface) 1g on the back of the seat back can be obtained.

Although the seat with a reclining device of the present invention is most suitable for a multi-purpose automobile seat, it is not limited to this.
It can also be used as a seat for other cars, trains, airplanes, ships, etc.

The above-mentioned embodiments are for illustrating the present invention, and are not intended to limit the scope of the present invention, and all modifications and modifications within the technical scope of the present invention are also included in the present invention. Needless to say.

〔Effect of the invention〕

As described above, in the seat with a reclining device according to the present invention, in addition to being folded forward around the first hinge of the reclining device, the seat back is tilted forward around the second hinge on the side of the seat back, and the seat back is tilted forward around the second hinge on the side of the seat back. It is configured to be able to swing relative to the base. An angle adjustment mechanism for swinging the seat back about the second hinge is provided on the arm plate of the reclining device. In other words, the angle adjustment mechanism allows the inclination angle of the seat back to be adjusted, and the seating plate on the back of the seat back to be set almost horizontally. Therefore, when the seating plate on the back surface of the seat back is used as a seating surface, a stable seating posture can always be obtained.

In addition, the angle adjustment mechanism is provided on the arm plate, and since it is sufficient to rotate the operating lever provided on the outside of the arm plate, the angle Fx on the back of the seat back can be easily adjusted. .

Furthermore, the angle adjustment mechanism is constructed by fixing a link with a locking pin to both ends of the rotatable shaft of the seat back, loosely inserting the locking pin into a guide groove of the base bracket, and locking it by an arm connected to an operating lever. The stop pin is configured to be movable. With such a configuration, the configuration of the angle adjustment mechanism itself is simplified, and the entire seat can be configured without becoming complicated or large.

[Brief explanation of drawings]

1A and 1B are a side view and a partially enlarged view of the interior of the seat with a reclining device according to the present invention in the seating position, and FIG. 2 is a side view of the seat in the forward folded position. , Figure 3 (
A) and (B) are front views of the reclining device in the seated position and the forward-tilted position. Figures 4 (A) and (B) are side views of the seat in the forward-tilted seating position, and internal views. FIG. 5 is an exploded perspective view of the angle adjustment mechanism, and FIG. 6 is a schematic perspective view of the seat back.

Claims (2)

[Claims] (1) In a seat with a reclining device in which the seat back is attached to the seat cushion so that it can be folded forward via a reclining device, in addition to the first hinge of the reclining device, the seat back is is connected to the arm plate by a second hinge, and an angle adjustment mechanism for swinging the seat back around the second hinge is provided on the arm plate, so that when the seat back is folded forward, the angle adjustment mechanism of the seat back is A seat with a reclining device, characterized in that the back surface can be set almost horizontally. (2) The angle adjustment mechanism includes a shaft that is installed between both sides of the seatback frame and is rotatably supported under biasing force, and a shaft that extends outside of the seatback frame. A pair of locking pins fixed to the terminal via a link, a roughly U-shaped guide groove into which the locking pin can be inserted loosely, and a pair of roughly U-shaped guide grooves fixed to the arm plate with a gap. a base bracket, a pair of arms having a pair of locking pieces capable of locking the locking pin and pivotally supported within the gap between the arm plate and the base bracket; and a pair of arms disposed outside the arm plate; The seat with a reclining device according to claim 1, further comprising: at least one operating lever operatively connected to the arm.